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117-611: Partial or intermittent negative reinforcement can create an effective climate of fear and doubt. Descartes employed Cartesian doubt as a pre-eminent methodological tool in his fundamental philosophical investigations. Branches of philosophy like logic devote much effort to distinguish the dubious, the probable and the certain. Much of illogic rests on dubious assumptions, dubious data or dubious conclusions, with rhetoric , whitewashing , and deception playing their accustomed roles. In his posthumous work On Certainty (OC), Ludwig Wittgenstein describes how our everyday use of

234-399: A conditioned reinforcer , is a stimulus or situation that has acquired its function as a reinforcer after pairing with a stimulus that functions as a reinforcer. This stimulus may be a primary reinforcer or another conditioned reinforcer (such as money). When trying to distinguish primary and secondary reinforcers in human examples, use the "caveman test." If the stimulus is something that

351-447: A crucial experiment . If the experimental results confirm the predictions, then the hypotheses are considered more likely to be correct, but might still be wrong and continue to be subject to further testing. The experimental control is a technique for dealing with observational error. This technique uses the contrast between multiple samples, or observations, or populations, under differing conditions, to see what varies or what remains

468-410: A 1919 solar eclipse supported General Relativity rather than Newtonian gravitation . [REDACTED] Watson and Crick showed an initial (and incorrect) proposal for the structure of DNA to a team from King's College London – Rosalind Franklin , Maurice Wilkins , and Raymond Gosling . Franklin immediately spotted the flaws which concerned the water content. Later Watson saw Franklin's photo 51 ,

585-399: A behavior from happening again is punishment , not negative reinforcement. The main difference is that reinforcement always increases the likelihood of a behavior (e.g., channel surfing while bored temporarily alleviated boredom; therefore, there will be more channel surfing while bored), whereas punishment decreases it (e.g., hangovers are an unpleasant stimulus, so people learn to avoid

702-441: A book because it is fun and interesting Example: Corporal punishment , such as spanking a child Example: Loss of privileges (e.g., screen time or permission to attend a desired event) if a rule is broken Example: Reading a book because it allows the reader to escape feelings of boredom or unhappiness A primary reinforcer , sometimes called an unconditioned reinforcer , is a stimulus that does not require pairing with

819-401: A brief period after the subject switches to it. When both the concurrent schedules are variable intervals , a quantitative relationship known as the matching law is found between relative response rates in the two schedules and the relative reinforcement rates they deliver; this was first observed by R.J. Herrnstein in 1961. Matching law is a rule for instrumental behavior which states that

936-447: A caveman would naturally find desirable (e.g. candy) then it is a primary reinforcer. If, on the other hand, the caveman would not react to it (e.g. a dollar bill), it is a secondary reinforcer. As with primary reinforcers, an organism can experience satisfaction and deprivation with secondary reinforcers. In his 1967 paper, Arbitrary and Natural Reinforcement , Charles Ferster proposed classifying reinforcement into events that increase

1053-417: A consequence of a behavior and the chance that this behavior will manifest in similar environments increases. For example, if reading a book is fun, then experiencing the fun positively reinforces the behavior of reading fun books. The person who receives the positive reinforcement (i.e., who has fun reading the book) will read more books to have more fun. The high probability instruction (HPI) treatment

1170-518: A controlled setting, such as a laboratory, or made on more or less inaccessible or unmanipulatable objects such as stars or human populations. The measurements often require specialized scientific instruments such as thermometers , spectroscopes , particle accelerators , or voltmeters , and the progress of a scientific field is usually intimately tied to their invention and improvement. I am not accustomed to saying anything with certainty after only one or two observations. The scientific definition of

1287-411: A detailed X-ray diffraction image, which showed an X-shape and was able to confirm the structure was helical. Once predictions are made, they can be sought by experiments. If the test results contradict the predictions, the hypotheses which entailed them are called into question and become less tenable. Sometimes the experiments are conducted incorrectly or are not very well designed when compared to

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1404-409: A different stimulus in order to function as a reinforcer and most likely has obtained this function through the evolution and its role in species' survival. Examples of primary reinforcers include food, water, and sex. Some primary reinforcers, such as certain drugs, may mimic the effects of other primary reinforcers. While these primary reinforcers are fairly stable through life and across individuals,

1521-433: A drug to cure this particular disease?" This stage frequently involves finding and evaluating evidence from previous experiments, personal scientific observations or assertions, as well as the work of other scientists. If the answer is already known, a different question that builds on the evidence can be posed. When applying the scientific method to research, determining a good question can be very difficult and it will affect

1638-431: A guideline for proceeding: The iterative cycle inherent in this step-by-step method goes from point 3 to 6 and back to 3 again. While this schema outlines a typical hypothesis/testing method, many philosophers, historians, and sociologists of science, including Paul Feyerabend , claim that such descriptions of scientific method have little relation to the ways that science is actually practiced. The basic elements of

1755-403: A headache. Reinforcement is an important component of operant conditioning and behavior modification . The concept has been applied in a variety of practical areas, including parenting, coaching, therapy, self-help, education, and management. In the behavioral sciences, the terms "positive" and "negative" refer when used in their strict technical sense to the nature of the action performed by

1872-525: A high school senior could have a choice between going to Stanford University or UCLA, and at the same time have the choice of going into the Army or the Air Force, and simultaneously the choice of taking a job with an internet company or a job with a software company. That is a reinforcement structure of three superimposed concurrent schedules of reinforcement. Superimposed schedules of reinforcement can create

1989-536: A laboratory analogy of social traps , such as when humans overharvest their fisheries or tear down their rainforests. Brechner created a situation where simple reinforcement schedules were superimposed upon each other. In other words, a single response or group of responses by an organism led to multiple consequences. Concurrent schedules of reinforcement can be thought of as "or" schedules, and superimposed schedules of reinforcement can be thought of as "and" schedules. Brechner and Linder (1981) and Brechner (1987) expanded

2106-431: A peck on either. The schedules of reinforcement arranged for pecks on the two keys can be different. They may be independent, or they may be linked so that behavior on one key affects the likelihood of reinforcement on the other. It is not necessary for responses on the two schedules to be physically distinct. In an alternate way of arranging concurrent schedules, introduced by Findley in 1958, both schedules are arranged on

2223-403: A phenomenon under study. Albert Einstein once observed that "there is no logical bridge between phenomena and their theoretical principles." Charles Sanders Peirce , borrowing a page from Aristotle ( Prior Analytics , 2.25 ) described the incipient stages of inquiry , instigated by the "irritation of doubt" to venture a plausible guess, as abductive reasoning . The history of science

2340-434: A plane from New York to Paris is an experiment that tests the aerodynamical hypotheses used for constructing the plane. These institutions thereby reduce the research function to a cost/benefit, which is expressed as money, and the time and attention of the researchers to be expended, in exchange for a report to their constituents. Current large instruments, such as CERN's Large Hadron Collider (LHC), or LIGO , or

2457-406: A positive stance in regard to the existence of god(s), but remain negative. Alternatively, doubt over the existence of god(s) may lead to acceptance of a particular religion: compare Pascal's Wager . Doubt of a specific theology, scriptural or deistic, may bring into question the truth of that theology's set of beliefs. On the other hand, doubt as to some doctrines but acceptance of others may lead to

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2574-410: A predecessor idea, but perhaps more in its ability to stimulate the research that will illuminate ... bald suppositions and areas of vagueness. In general, scientists tend to look for theories that are " elegant " or " beautiful ". Scientists often use these terms to refer to a theory that is following the known facts but is nevertheless relatively simple and easy to handle. Occam's Razor serves as

2691-439: A reinforcer could be delivered after more than one instance of the behavior. For example, a pigeon may be required to peck a button switch ten times before food appears. This is a "ratio schedule". Also, a reinforcer could be delivered after an interval of time passed following a target behavior. An example is a rat that is given a food pellet immediately following the first response that occurs after two minutes has elapsed since

2808-426: A response. The study of reinforcement has produced an enormous body of reproducible experimental results. Reinforcement is the central concept and procedure in special education , applied behavior analysis , and the experimental analysis of behavior and is a core concept in some medical and psychopharmacology models, particularly addiction , dependence , and compulsion . Laboratory research on reinforcement

2925-408: A role, for instance. The history of scientific method considers changes in the methodology of scientific inquiry, not the history of science itself. The development of rules for scientific reasoning has not been straightforward; scientific method has been the subject of intense and recurring debate throughout the history of science, and eminent natural philosophers and scientists have argued for

3042-519: A rule of thumb for choosing the most desirable amongst a group of equally explanatory hypotheses. To minimize the confirmation bias that results from entertaining a single hypothesis, strong inference emphasizes the need for entertaining multiple alternative hypotheses, and avoiding artifacts. [REDACTED] James D. Watson , Francis Crick , and others hypothesized that DNA had a helical structure. This implied that DNA's X-ray diffraction pattern would be 'x shaped'. This prediction followed from

3159-426: A series of behaviors (e.g. showering, drying off, getting dressed) occurring in sequence as a well learned habit. Challenging behaviors seen in individuals with autism and other related disabilities have successfully managed and maintained in studies using a scheduled of chained reinforcements. Functional communication training is an intervention that often uses chained schedules of reinforcement to effectively promote

3276-619: A set of phenomena. Normally, hypotheses have the form of a mathematical model . Sometimes, but not always, they can also be formulated as existential statements , stating that some particular instance of the phenomenon being studied has some characteristic and causal explanations, which have the general form of universal statements , stating that every instance of the phenomenon has a particular characteristic. Scientists are free to use whatever resources they have – their own creativity, ideas from other fields, inductive reasoning , Bayesian inference , and so on – to imagine possible explanations for

3393-406: A single key or other response device, and the subject can respond on a second key to change between the schedules. In such a "Findley concurrent" procedure, a stimulus (e.g., the color of the main key) signals which schedule is in effect. Concurrent schedules often induce rapid alternation between the keys. To prevent this, a "changeover delay" is commonly introduced: each schedule is inactivated for

3510-530: A skeptic Francisco Sanches , by idealists as well as empiricists John Locke , George Berkeley , and David Hume . C. S. Peirce formulated the hypothetico-deductive model in the 20th century, and the model has undergone significant revision since. The term "scientific method" emerged in the 19th century, as a result of significant institutional development of science, and terminologies establishing clear boundaries between science and non-science, such as "scientist" and "pseudoscience", appearing. Throughout

3627-399: A subject's behavior. For example, if a child reads books because they are fun, then the parents' decision to ignore the book reading will not remove the positive reinforcement (i.e., fun) the child receives from reading books. However, if a child engages in a behavior to get attention from the parents, then the parents' decision to ignore the behavior will cause the behavior to go extinct, and

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3744-584: A term sometimes differs substantially from its natural language usage. For example, mass and weight overlap in meaning in common discourse, but have distinct meanings in mechanics . Scientific quantities are often characterized by their units of measure which can later be described in terms of conventional physical units when communicating the work. New theories are sometimes developed after realizing certain terms have not previously been sufficiently clearly defined. For example, Albert Einstein 's first paper on relativity begins by defining simultaneity and

3861-420: A type of compound schedule that evolved from the initial work on simple schedules of reinforcement by B.F. Skinner and his colleagues (Skinner and Ferster, 1957). They demonstrated that reinforcers could be delivered on schedules, and further that organisms behaved differently under different schedules. Rather than a reinforcer, such as food or water, being delivered every time as a consequence of some behavior,

3978-447: A “consequence of behavior that reduces the future probability of that behavior,” and some studies have shown that positive reinforcement and punishment are equally effective in modifying behavior. Research on the effects of positive reinforcement, negative reinforcement and punishment continue today as those concepts are fundamental to learning theory and apply to many practical applications of that theory. The term operant conditioning

4095-425: Is a behaviorist treatment based on the idea of positive reinforcement. Negative reinforcement increases the rate of a behavior that avoids or escapes an aversive situation or stimulus . That is, something unpleasant is already happening, and the behavior helps the person avoid or escape the unpleasantness. In contrast to positive reinforcement, which involves adding a pleasant stimulus, in negative reinforcement,

4212-399: Is also used for food refusal. Food refusal is when an individual has a partial or total aversion to food items. This can be as minimal as being a picky eater to so severe that it can affect an individual's health. Shaping has been used to have a high success rate for food acceptance. Chaining involves linking discrete behaviors together in a series, such that the consequence of each behavior

4329-456: Is an important influence on how the different schedules operate. Many simple and complex schedules were investigated at great length by B.F. Skinner using pigeons . Simple schedules have a single rule to determine when a single type of reinforcer is delivered for a specific response. Simple schedules are utilized in many differential reinforcement procedures: Compound schedules combine two or more different simple schedules in some way using

4446-461: Is at the same time to have doubt. Most criminal cases within an adversarial system require that the prosecution proves its contentions beyond a reasonable doubt — a doctrine also called the " burden of proof ". This means that the State must present propositions which preclude "reasonable doubt" in the mind of a reasonable person as to the guilt of defendant. Some doubt may persist, but only to

4563-399: Is both the reinforcement for the previous behavior, and the antecedent stimulus for the next behavior. There are many ways to teach chaining, such as forward chaining (starting from the first behavior in the chain), backwards chaining (starting from the last behavior) and total task chaining (teaching each behavior in the chain simultaneously). People's morning routines are a typical chain, with

4680-399: Is essential that the outcome of testing such a prediction be currently unknown. Only in this case does a successful outcome increase the probability that the hypothesis is true. If the outcome is already known, it is called a consequence and should have already been considered while formulating the hypothesis . If the predictions are not accessible by observation or experience, the hypothesis

4797-424: Is filled with stories of scientists claiming a "flash of inspiration", or a hunch, which then motivated them to look for evidence to support or refute their idea. Michael Polanyi made such creativity the centerpiece of his discussion of methodology. William Glen observes that the success of a hypothesis, or its service to science, lies not simply in its perceived "truth", or power to displace, subsume or reduce

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4914-483: Is not only methodical doubt, but positive doubt. One can believe only what one has perceived to be true from reasonable grounds, and consequently one must have the courage to continue doubting until one has found reliable grounds to satisfy the reason. Doubt that god(s) exist may form the basis of agnosticism — the belief that one cannot determine the existence or non-existence of god(s). It may also form other brands of skepticism , such as Pyrrhonism , which do not take

5031-417: Is not yet testable and so will remain to that extent unscientific in a strict sense. A new technology or theory might make the necessary experiments feasible. For example, while a hypothesis on the existence of other intelligent species may be convincing with scientifically based speculation, no known experiment can test this hypothesis. Therefore, science itself can have little to say about the possibility. In

5148-418: Is reinforced, and extinction, where no response is reinforced. Between these extremes, more complex schedules of reinforcement specify the rules that determine how and when a response will be followed by a reinforcer. Specific schedules of reinforcement reliably induce specific patterns of response, and these rules apply across many different species. The varying consistency and predictability of reinforcement

5265-442: Is the antecedent, the student's response is the behavior, and the praise and attention are the reinforcements. Consequences that lead to appetitive behavior such as subjective "wanting" and "liking" (desire and pleasure) function as rewards or positive reinforcement . There is also negative reinforcement , which involves taking away an undesirable stimulus. An example of negative reinforcement would be taking an aspirin to relieve

5382-461: Is the process by which science is carried out. As in other areas of inquiry, science (through the scientific method) can build on previous knowledge, and unify understanding of its studied topics over time. This model can be seen to underlie the scientific revolution . The overall process involves making conjectures ( hypotheses ), predicting their logical consequences, then carrying out experiments based on those predictions to determine whether

5499-420: Is used in many training situations, and also for individuals with autism as well as other developmental disabilities. When shaping is combined with other evidence-based practices such as Functional Communication Training (FCT), it can yield positive outcomes for human behavior. Shaping typically uses continuous reinforcement, but the response can later be shifted to an intermittent reinforcement schedule. Shaping

5616-524: Is usually dated from the work of Edward Thorndike , known for his experiments with cats escaping from puzzle boxes. A number of others continued this research, notably B.F. Skinner, who published his seminal work on the topic in The Behavior of Organisms , in 1938, and elaborated this research in many subsequent publications. Notably Skinner argued that positive reinforcement is superior to punishment in shaping behavior. Though punishment may seem just

5733-717: The National Ignition Facility (NIF), or the International Space Station (ISS), or the James Webb Space Telescope (JWST), entail expected costs of billions of dollars, and timeframes extending over decades. These kinds of institutions affect public policy, on a national or even international basis, and the researchers would require shared access to such machines and their adjunct infrastructure . Scientists assume an attitude of openness and accountability on

5850-431: The observation . Scientific inquiry includes creating a testable hypothesis through inductive reasoning , testing it through experiments and statistical analysis, and adjusting or discarding the hypothesis based on the results. Although procedures vary between fields , the underlying process is often similar. In more detail: the scientific method involves making conjectures (hypothetical explanations), predicting

5967-415: The visual system , rather than to study free will , for example. His cautionary example was the gene; the gene was much more poorly understood before Watson and Crick's pioneering discovery of the structure of DNA; it would have been counterproductive to spend much time on the definition of the gene, before them. [REDACTED] Linus Pauling proposed that DNA might be a triple helix . This hypothesis

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6084-589: The "scientific method" and in doing so largely replaced the notion of science as a homogeneous and universal method with that of it being a heterogeneous and local practice. In particular, Paul Feyerabend, in the 1975 first edition of his book Against Method , argued against there being any universal rules of science ; Karl Popper , and Gauch 2003, disagree with Feyerabend's claim. Later stances include physicist Lee Smolin 's 2013 essay "There Is No Scientific Method", in which he espouses two ethical principles , and historian of science Daniel Thurs' chapter in

6201-449: The 1830s and 1850s, when Baconianism was popular, naturalists like William Whewell, John Herschel and John Stuart Mill engaged in debates over "induction" and "facts" and were focused on how to generate knowledge. In the late 19th and early 20th centuries, a debate over realism vs. antirealism was conducted as powerful scientific theories extended beyond the realm of the observable. The term "scientific method" came into popular use in

6318-425: The 2015 book Newton's Apple and Other Myths about Science , which concluded that the scientific method is a myth or, at best, an idealization. As myths are beliefs, they are subject to the narrative fallacy as Taleb points out. Philosophers Robert Nola and Howard Sankey, in their 2007 book Theories of Scientific Method , said that debates over the scientific method continue, and argued that Feyerabend, despite

6435-546: The Earth, while controlled experiments can be seen in the works of al-Battani (853–929 CE) and Alhazen (965–1039 CE). [REDACTED] Watson and Crick then produced their model, using this information along with the previously known information about DNA's composition, especially Chargaff's rules of base pairing. After considerable fruitless experimentation, being discouraged by their superior from continuing, and numerous false starts, Watson and Crick were able to infer

6552-565: The Los Angeles County storm drain system (Brechner, 2010). In operant conditioning , concurrent schedules of reinforcement are schedules of reinforcement that are simultaneously available to an animal subject or human participant, so that the subject or participant can respond on either schedule. For example, in a two-alternative forced choice task, a pigeon in a Skinner box is faced with two pecking keys; pecking responses can be made on either, and food reinforcement might follow

6669-411: The appropriate and desired functional communication response. Scientific method The scientific method is an empirical method for acquiring knowledge that has been referred to while doing science since at least the 17th century. The scientific method involves careful observation coupled with rigorous scepticism , because cognitive assumptions can distort the interpretation of

6786-446: The basic method used for scientific inquiry. The scientific community and philosophers of science generally agree on the following classification of method components. These methodological elements and organization of procedures tend to be more characteristic of experimental sciences than social sciences . Nonetheless, the cycle of formulating hypotheses, testing and analyzing the results, and formulating new hypotheses, will resemble

6903-481: The behavior that led to that unpleasant stimulus). Extinction occurs when a given behavior is ignored (i.e. followed up with no consequence). Behaviors disappear over time when they continuously receive no reinforcement. During a deliberate extinction, the targeted behavior spikes first (in an attempt to produce the expected, previously reinforced effects), and then declines over time. Neither reinforcement nor extinction need to be deliberate in order to have an effect on

7020-478: The behavior. Another example is a social situation that will generally result from a specific behavior once it has met a certain criterion. Behavior is not always reinforced every time it is emitted, and the pattern of reinforcement strongly affects how fast an operant response is learned, what its rate is at any given time, and how long it continues when reinforcement ceases. The simplest rules controlling reinforcement are continuous reinforcement, where every response

7137-483: The child will find a different behavior to get their parents' attention. Reinforcers serve to increase behaviors whereas punishers serve to decrease behaviors; thus, positive reinforcers are stimuli that the subject will work to attain, and negative reinforcers are stimuli that the subject will work to be rid of or to end. The table below illustrates the adding and subtracting of stimuli (pleasant or aversive) in relation to reinforcement vs. punishment. Example: Reading

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7254-587: The concept to describe how superimposed schedules and the social trap analogy could be used to analyze the way energy flows through systems . Superimposed schedules of reinforcement have many real-world applications in addition to generating social traps . Many different human individual and social situations can be created by superimposing simple reinforcement schedules. For example, a human being could have simultaneous tobacco and alcohol addictions. Even more complex situations can be created or simulated by superimposing two or more concurrent schedules. For example,

7371-440: The conditioner rather than to the responding operant's evaluation of that action and its consequence(s). "Positive" actions are those that add a factor, be it pleasant or unpleasant, to the environment, whereas "negative" actions are those that remove or withhold from the environment a factor of either type. In turn, the strict sense of "reinforcement" refers only to reward-based conditioning; the introduction of unpleasant factors and

7488-467: The contrary, if the astronomically massive, the feather-light, and the extremely fast are removed from Einstein's theories – all phenomena Newton could not have observed – Newton's equations are what remain. Einstein's theories are expansions and refinements of Newton's theories and, thus, increase confidence in Newton's work. An iterative, pragmatic scheme of the four points above is sometimes offered as

7605-412: The cookie cannot be considered reinforcing. The sole criterion that determines if a stimulus is reinforcing is the change in probability of a behavior after administration of that potential reinforcer. Other theories may focus on additional factors such as whether the person expected a behavior to produce a given outcome, but in the behavioral theory, reinforcement is defined by an increased probability of

7722-553: The cycle described below. The scientific method is an iterative, cyclical process through which information is continually revised. It is generally recognized to develop advances in knowledge through the following elements, in varying combinations or contributions: Each element of the scientific method is subject to peer review for possible mistakes. These activities do not describe all that scientists do but apply mostly to experimental sciences (e.g., physics, chemistry, biology, and psychology). The elements above are often taught in

7839-411: The desirable response by presenting a reflex eliciting stimulus, the unconditional stimulus (UCS), which they pair (precede) with a neutral stimulus, the conditional stimulus (CS). Reinforcement is a basic term in operant conditioning. For the punishment aspect of operant conditioning, see punishment (psychology) . Positive reinforcement occurs when a desirable event or stimulus is presented as

7956-499: The doubt is the rational part of a person's thought involved in weighing evidence, without which the belief would have no real substance. Belief is not a decision based on evidence that, say, certain beliefs about God are true or a certain person is worthy of love. No such evidence could ever be enough to pragmatically justify the kind of total commitment involved in true theological belief or romantic love. Belief involves making that commitment anyway. Kierkegaard thought that to have belief

8073-557: The educational system as "the scientific method". The scientific method is not a single recipe: it requires intelligence, imagination, and creativity. In this sense, it is not a mindless set of standards and procedures to follow but is rather an ongoing cycle , constantly developing more useful, accurate, and comprehensive models and methods. For example, when Einstein developed the Special and General Theories of Relativity, he did not in any way refute or discount Newton's Principia . On

8190-402: The essential structure of DNA by concrete modeling of the physical shapes of the nucleotides which comprise it. They were guided by the bond lengths which had been deduced by Linus Pauling and by Rosalind Franklin 's X-ray diffraction images. The scientific method is iterative. At any stage, it is possible to refine its accuracy and precision , so that some consideration will lead

8307-448: The experimental method, the hypothesis, or the definition of the subject. This manner of iteration can span decades and sometimes centuries. Published papers can be built upon. For example: By 1027, Alhazen , based on his measurements of the refraction of light, was able to deduce that outer space was less dense than air , that is: "the body of the heavens is rarer than the body of air". In 1079 Ibn Mu'adh 's Treatise On Twilight

8424-469: The extent that it would not affect a "reasonable person's" belief in the defendant's guilt. If the doubt raised does affect a "reasonable person's" belief, the jury is not satisfied beyond a "reasonable doubt". The jurisprudence of the applicable jurisdiction usually defines the precise meaning of words such as "reasonable" and "doubt" for such purposes. To doubt everything or to believe everything are two equally convenient solutions; both dispense with

8541-423: The focus is on the removal of an unpleasant situation or stimulus. For example, if someone feels unhappy, then they might engage in a behavior (e.g., reading books) to escape from the aversive situation (e.g., their unhappy feelings). The success of that avoidant or escapist behavior in removing the unpleasant situation or stimulus reinforces the behavior. Doing something unpleasant to people to prevent or remove

8658-413: The frequency of an operant behavior as a natural consequence of the behavior itself, and events that affect frequency by their requirement of human mediation, such as in a token economy where subjects are rewarded for certain behavior by the therapist. In 1970, Baer and Wolf developed the concept of "behavioral traps." A behavioral trap requires only a simple response to enter the trap, yet once entered,

8775-402: The front door is rewarded by a big kiss on the lips by the person's spouse and a rip in the pants from the family dog jumping enthusiastically. Another example of superimposed schedules of reinforcement is a pigeon in an experimental cage pecking at a button. The pecks deliver a hopper of grain every 20th peck, and access to water after every 200 pecks. Superimposed schedules of reinforcement are

8892-427: The furthering of empiricism by Francis Bacon and Robert Hooke , the rationalist approach described by René Descartes and inductivism , brought to particular prominence by Isaac Newton and those who followed him. Experiments were advocated by Francis Bacon , and performed by Giambattista della Porta , Johannes Kepler , and Galileo Galilei . There was particular development aided by theoretical works by

9009-468: The future, a new technique may allow for an experimental test and the speculation would then become part of accepted science. For example, Einstein's theory of general relativity makes several specific predictions about the observable structure of spacetime , such as that light bends in a gravitational field , and that the amount of bending depends in a precise way on the strength of that gravitational field. Arthur Eddington 's observations made during

9126-450: The growth of heresy and/or the splitting off of sects or groups of thought. Thus proto-Protestants doubted papal authority , and substituted alternative methods of governance in their new (but still recognizably similar) churches. Christian existentialists such as Søren Kierkegaard suggest that for one to truly have belief in God, one would also have to doubt one's beliefs about God;

9243-435: The hypothesis; otherwise, the hypothesis cannot be meaningfully tested. While the scientific method is often presented as a fixed sequence of steps, it actually represents a set of general principles. Not all steps take place in every scientific inquiry (nor to the same degree), and they are not always in the same order. Numerous discoveries have not followed the textbook model of the scientific method and chance has played

9360-419: The last lever press. This is called an "interval schedule". In addition, ratio schedules can deliver reinforcement following fixed or variable number of behaviors by the individual organism. Likewise, interval schedules can deliver reinforcement following fixed or variable intervals of time following a single response by the organism. Individual behaviors tend to generate response rates that differ based upon how

9477-442: The lever is reinforced at first. Then, only turning and stepping toward it is reinforced. Eventually the rat will be reinforced for pressing the lever. The successful attainment of one behavior starts the shaping process for the next. As training progresses, the response becomes progressively more like the desired behavior, with each subsequent behavior becoming a closer approximation of the final behavior. The intervention of shaping

9594-425: The logical consequences of hypothesis, then carrying out experiments or empirical observations based on those predictions. A hypothesis is a conjecture based on knowledge obtained while seeking answers to the question. Hypotheses can be very specific or broad but must be falsifiable , implying that it is possible to identify a possible outcome of an experiment or observation that conflicts with predictions deduced from

9711-526: The means for determining length . These ideas were skipped over by Isaac Newton with, "I do not define time , space, place and motion , as being well known to all." Einstein's paper then demonstrates that they (viz., absolute time and length independent of motion) were approximations. Francis Crick cautions us that when characterizing a subject, however, it can be premature to define something when it remains ill-understood. In Crick's study of consciousness , he actually found it easier to study awareness in

9828-535: The mechanism of storing genetic information (i.e., genes) in DNA was unclear. Researchers in Bragg's laboratory at Cambridge University made X-ray diffraction pictures of various molecules , starting with crystals of salt , and proceeding to more complicated substances. Using clues painstakingly assembled over decades, beginning with its chemical composition, it was determined that it should be possible to characterize

9945-407: The necessity of reflection. — Henri Poincaré , Science and Hypothesis (1905) (from Dover abridged edition of 1952) The scientific method regularly quantifies doubt, and uses it to determine whether further research is needed . Isaac Asimov , in his 1962 essay collection Fact and Fancy , described science as a system for causing and resolving intelligent doubt. Charles Peirce saw doubt as

10062-451: The opposite of reinforcement, Skinner claimed that they differ immensely, saying that positive reinforcement results in lasting behavioral modification (long-term) whereas punishment changes behavior only temporarily (short-term) and has many detrimental side-effects. A great many researchers subsequently expanded our understanding of reinforcement and challenged some of Skinner's conclusions. For example, Azrin and Holz defined punishment as

10179-405: The original conjecture was correct. However, there are difficulties in a formulaic statement of method. Though the scientific method is often presented as a fixed sequence of steps, these actions are more accurately general principles. Not all steps take place in every scientific inquiry (nor to the same degree), and they are not always done in the same order. There are different ways of outlining

10296-431: The outcome of the investigation. The systematic, careful collection of measurements or counts of relevant quantities is often the critical difference between pseudo-sciences , such as alchemy, and science, such as chemistry or biology. Scientific measurements are usually tabulated, graphed, or mapped, and statistical manipulations, such as correlation and regression , performed on them. The measurements might be made in

10413-403: The part of those experimenting. Detailed record-keeping is essential, to aid in recording and reporting on the experimental results, and supports the effectiveness and integrity of the procedure. They will also assist in reproducing the experimental results, likely by others. Traces of this approach can be seen in the work of Hipparchus (190–120 BCE), when determining a value for the precession of

10530-403: The pertinent properties of the subjects, careful thought may also entail some definitions and observations ; these observations often demand careful measurements and/or counting can take the form of expansive empirical research . A scientific question can refer to the explanation of a specific observation , as in "Why is the sky blue?" but can also be open-ended, as in "How can I design

10647-588: The physical structure of DNA, and the X-ray images would be the vehicle. The scientific method depends upon increasingly sophisticated characterizations of the subjects of investigation. (The subjects can also be called unsolved problems or the unknowns .) For example, Benjamin Franklin conjectured, correctly, that St. Elmo's fire was electrical in nature , but it has taken a long series of experiments and theoretical changes to establish this. While seeking

10764-450: The presence of a particular antecedent stimulus . For example, a rat can be trained to push a lever to receive food whenever a light is turned on. In this example, the light is the antecedent stimulus, the lever pushing is the operant behavior, and the food is the reinforcer. Likewise, a student that receives attention and praise when answering a teacher's question will be more likely to answer future questions in class. The teacher's question

10881-421: The primacy of various approaches to establishing scientific knowledge. Different early expressions of empiricism and the scientific method can be found throughout history, for instance with the ancient Stoics , Epicurus , Alhazen , Avicenna , Al-Biruni , Roger Bacon , and William of Ockham . In the scientific revolution of the 16th and 17th centuries some of the most important developments were

10998-424: The process at any stage. They might adopt the characterization and formulate their own hypothesis, or they might adopt the hypothesis and deduce their own predictions. Often the experiment is not done by the person who made the prediction, and the characterization is based on experiments done by someone else. Published results of experiments can also serve as a hypothesis predicting their own reproducibility. Science

11115-466: The reinforcement schedule is created. Much subsequent research in many labs examined the effects on behaviors of scheduling reinforcers. If an organism is offered the opportunity to choose between or among two or more simple schedules of reinforcement at the same time, the reinforcement structure is called a "concurrent schedule of reinforcement". Brechner (1974, 1977) introduced the concept of superimposed schedules of reinforcement in an attempt to create

11232-416: The reinforcing value of different primary reinforcers varies due to multiple factors (e.g., genetics, experience). Thus, one person may prefer one type of food while another avoids it. Or one person may eat much food while another eats very little. So even though food is a primary reinforcer for both individuals, the value of food as a reinforcer differs between them. A secondary reinforcer , sometimes called

11349-406: The relative rate of responding on a particular response alternative equals the relative rate of reinforcement for that response (rate of behavior = rate of reinforcement). Animals and humans have a tendency to prefer choice in schedules. Shaping is the reinforcement of successive approximations to a desired instrumental response. In training a rat to press a lever, for example, simply turning toward

11466-419: The removal or withholding of a pleasant factor. This usage is at odds with some non-technical usages of the four term combinations, especially in the case of the term "negative reinforcement", which is often used to denote what technical parlance would describe as "positive punishment" in that the non-technical usage interprets "reinforcement" as subsuming both reward and punishment and "negative" as referring to

11583-445: The removal or withholding of pleasant factors are instead referred to as "punishment", which when used in its strict sense thus stands in contradistinction to "reinforcement". Thus, "positive reinforcement" refers to the addition of a pleasant factor, "positive punishment" refers to the addition of an unpleasant factor, "negative reinforcement" refers to the removal or withholding of an unpleasant factor, and "negative punishment" refers to

11700-532: The responding operant's evaluation of the factor being introduced. By contrast, technical parlance would use the term "negative reinforcement" to describe encouragement of a given behavior by creating a scenario in which an unpleasant factor is or will be present but engaging in the behavior results in either escaping from that factor or preventing its occurrence, as in Martin Seligman’s experimente involving dogs learning to avoid electric shocks . B.F. Skinner

11817-475: The response preceding them). Stimuli, settings, and activities only fit the definition of reinforcers if the behavior that immediately precedes the potential reinforcer increases in similar situations in the future; for example, a child who receives a cookie when he or she asks for one. If the frequency of "cookie-requesting behavior" increases, the cookie can be seen as reinforcing "cookie-requesting behavior". If however, "cookie-requesting behavior" does not increase

11934-416: The same reinforcer for the same behavior. There are many possibilities; among those most often used are: The psychology term superimposed schedules of reinforcement refers to a structure of rewards where two or more simple schedules of reinforcement operate simultaneously. Reinforcers can be positive, negative, or both. An example is a person who comes home after a long day at work. The behavior of opening

12051-461: The same. We vary the conditions for the acts of measurement, to help isolate what has changed. Mill's canons can then help us figure out what the important factor is. Factor analysis is one technique for discovering the important factor in an effect. Depending on the predictions, the experiments can have different shapes. It could be a classical experiment in a laboratory setting, a double-blind study or an archaeological excavation . Even taking

12168-422: The scientific method are illustrated by the following example (which occurred from 1944 to 1953) from the discovery of the structure of DNA (marked with [REDACTED] and indented). [REDACTED] In 1950, it was known that genetic inheritance had a mathematical description, starting with the studies of Gregor Mendel , and that DNA contained genetic information (Oswald Avery's transforming principle ). But

12285-413: The scientist to repeat an earlier part of the process. Failure to develop an interesting hypothesis may lead a scientist to re-define the subject under consideration. Failure of a hypothesis to produce interesting and testable predictions may lead to reconsideration of the hypothesis or of the definition of the subject. Failure of an experiment to produce interesting results may lead a scientist to reconsider

12402-411: The specific pairing we have postulated immediately suggests a possible copying mechanism for the genetic material". Any useful hypothesis will enable predictions , by reasoning including deductive reasoning . It might predict the outcome of an experiment in a laboratory setting or the observation of a phenomenon in nature. The prediction can also be statistical and deal only with probabilities. It

12519-464: The starting point of any scientific investigation. Karl Popper deployed scientific doubt as an essential tool: scientists working in the Popperian paradigm doubt any theory so thoroughly that they strive to falsify that theory. Reinforcement In behavioral psychology , reinforcement refers to consequences that increase the likelihood of an organism's future behavior, typically in

12636-456: The three classic conflict situations (approach–approach conflict, approach–avoidance conflict , and avoidance–avoidance conflict) described by Kurt Lewin (1935) and can operationalize other Lewinian situations analyzed by his force field analysis . Other examples of the use of superimposed schedules of reinforcement as an analytical tool are its application to the contingencies of rent control (Brechner, 2003) and problem of toxic waste dumping in

12753-582: The title of Against Method , accepted certain rules of method and attempted to justify those rules with a meta methodology. Staddon (2017) argues it is a mistake to try following rules in the absence of an algorithmic scientific method; in that case, "science is best understood through examples". But algorithmic methods, such as disproof of existing theory by experiment have been used since Alhacen (1027) and his Book of Optics , and Galileo (1638) and his Two New Sciences , and The Assayer , which still stand as scientific method. The scientific method

12870-431: The trap cannot be resisted in creating general behavior change. It is the use of a behavioral trap that increases a person's repertoire, by exposing them to the naturally occurring reinforcement of that behavior. Behavioral traps have four characteristics: Thus, artificial reinforcement can be used to build or develop generalizable skills, eventually transitioning to naturally occurring reinforcement to maintain or increase

12987-416: The twentieth century; Dewey's 1910 book , How We Think , inspired popular guidelines , appearing in dictionaries and science textbooks, although there was little consensus over its meaning. Although there was growth through the middle of the twentieth century, by the 1960s and 1970s numerous influential philosophers of science such as Thomas Kuhn and Paul Feyerabend had questioned the universality of

13104-531: The words ‘doubt’ and ‘certainty’ function. The two concepts are interwoven into our daily lives such that if we cannot be certain of any fact, then we cannot be certain of the meaning of our words either. (OC §114). Doubt as a path towards (deeper) belief lies at the heart of the story of Saint Thomas the Apostle . Note in this respect the theological views of Georg Hermes : ... the starting-point and chief principle of every science, and hence of theology also,

13221-434: The work of Cochran, Crick and Vand (and independently by Stokes). The Cochran-Crick-Vand-Stokes theorem provided a mathematical explanation for the empirical observation that diffraction from helical structures produces x-shaped patterns. In their first paper, Watson and Crick also noted that the double helix structure they proposed provided a simple mechanism for DNA replication , writing, "It has not escaped our notice that

13338-457: Was a well-known and influential researcher who articulated many of the theoretical constructs of reinforcement and behaviorism . Skinner defined reinforcers according to the change in response strength (response rate) rather than to more subjective criteria, such as what is pleasurable or valuable to someone. Accordingly, activities, foods or items considered pleasant or enjoyable may not necessarily be reinforcing (because they produce no increase in

13455-405: Was able to infer that Earth's atmosphere was 50 miles thick, based on atmospheric refraction of the sun's rays. This is why the scientific method is often represented as circular – new information leads to new characterisations, and the cycle of science continues. Measurements collected can be archived , passed onwards and used by others. Other scientists may start their own research and enter

13572-409: Was also considered by Francis Crick and James D. Watson but discarded. When Watson and Crick learned of Pauling's hypothesis, they understood from existing data that Pauling was wrong. and that Pauling would soon admit his difficulties with that structure. A hypothesis is a suggested explanation of a phenomenon, or alternately a reasoned proposal suggesting a possible correlation between or among

13689-403: Was introduced by Skinner to indicate that in his experimental paradigm, the organism is free to operate on the environment. In this paradigm, the experimenter cannot trigger the desirable response; the experimenter waits for the response to occur (to be emitted by the organism) and then a potential reinforcer is delivered. In the classical conditioning paradigm, the experimenter triggers (elicits)

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