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Behaviourism Siobhán Dervan Digital Enterprise Research Institute IDA Business Park Lower Dangan, Galway, Ireland Tel: +353 91 495053 E-mail: [email protected] INTRODUCTION Learning theories are utilised in both psychology and education to help us understand and explain the process of learning. As with any other field of research there are many different theoretical perspectives on how people acquire knowledge. Generally speaking there are three basic theories of learning each of which with distinctly different views of the learning process; behaviourism, cognitivism and constructivism. Behaviourism is based on observable changes in behaviour whereas cognitivism focuses on the thought process behind the behaviour and constructivism is founded on the premise that every human constructs their own perspective of the world through individual experiences. The focus of this paper however is on the behaviourist orientation to learning. Behaviourism became one of the dominant areas of research into learning throughout the twentieth century and bbehaviourist learning theories were the first to be used in the development of instructional design. For many years concepts of behavioural theory formed the basis of the majority of the learning theory applied in child rearing and in classrooms. Later when the cognitive approach became more widely popular behaviourist theorists focused their attention on programmed learning and most modern computer-aided instruction is built on the solid foundation laid by behaviourist researchers. Today in many instances parents and teachers still find behavioural principles are often effective, especially with small children and simpler tasks. learning is the concept of rewarded response. In order for learning to take place the desired response must be rewarded. For example in education, advocates of behaviourism have effectively adopted this system of rewards and punishments in their classrooms by rewarding desired behaviours and punishing inappropriate ones. Obviously the rewards vary but they must be important to the learner in some way. Both reinforcement rewards and punishments can either positive or negative. This idea is prone to the common misconception that negative reinforcement is actually punishment but this is not the case. Positive reinforcement gives the learner something to increase desired behaviour e.g. a treat or compliment, whereas negative reinforcement strengthens behaviour through the removal of an unpleasant stimulus e.g. less homework. Positive and negative punishments work in a similar way for example as a positive punishment a learner may receive detention or extra work. Negative punishment removes something from the learner e.g. missing break time. As with all teaching methods, success depends on each particular student's stimulus and response, and on associations made by each learner. There are several general assumptions made by behaviourist theories; Every behaviour has causes that can be understood by scientific methods The same learning principles apply equally to different behaviours and different species. To objectively study learning processes one must focus solely on stimuli and responses. Internal cognitive processes are excluded from scientific study All organisms are born as “blank slates” Learning involves a behaviour change and largely the result of environmental events Basics of behaviourism Behaviourism is primarily concerned with observable and measurable aspects of human and animal behaviour. The theory of behaviourism views the mind as a “black box” and discounts all mental activities or thought processes that may have occurred. This is because of the belief that the only behaviours worthy of study are those that can be directly observed i.e. actions rather than thoughts or emotions. Behaviour theorists define learning as nothing more than the acquisition of new behaviour and this is achieved by repeating a new behavioural pattern until it becomes automatic. Behaviour is directed by stimuli in the external environment; the individual selects one response over another because of prior conditioning and psychological drives existing at the moment of the action. Consequently behaviourists also hold that all behaviours can also be unlearned, and replaced by new behaviours. One of the key factors in the behaviourist theory of KEY BEHAVIOURISM THEORISTS Experiments by behaviourists identify conditioning as a universal learning process. Conditioning is a process of behaviour modification by which a subject comes to associate a desired behaviour with a previously unrelated stimulus. There were four key players in the development of behaviourist theory during the 19th and 20th centuries. Ivan Petrovich Pavlov (1849 - 1936) Pavlov first explored the theory of classical conditioning and was famous for his conditioning experiments with his dogs. Classical conditioning is a learning process which occurs when a natural reflex responds to a stimulus. When a hungry dog sees food he salivates. This is an unconscious, uncontrolled, and unlearned response. Therefore we call the food an "unconditioned" stimulus and the salivation an "unconditioned" response. They are naturally connected. They did not have to be learned, it was already present. Through his canine experiments Pavlov discovered that when an unconditioned stimulus (food) which produces an unconditioned response (salivation) is presented together with a conditioned stimulus (a bell), the unconditioned response (salivation) is eventually produced on the presentation of the conditioned stimulus (the bell) alone, thus becoming a conditioned response. He also discovered that if you stopped the simultaneous ringing of the bell with the food, eventually the dog would cease the connection between the salivation and the bell. It was easy to recover the response if the connection was begun again. Today this concept of learning by association is profusely exploited in advertising and these associations can be chained and generalized for better or for worse, For example "smell of baking" associates with "kitchen at home in childhood" which associates with "love and care". gradually shortened with each try. His realized the animal created a connection between the proper response and the food the cat received. The process of having a particular stimulus-response sequence followed by pleasure allowed the response to be "stamped in". When the stimulus-response was followed by pain, the responses were "stamped out." He established his principle of law of effect from his conclusions in this experiment. John B. Watson (1878 - 1958) Watson is considered the father of behaviourism because the paper he published in 1913 stating his beliefs on psychology later formed the basis for a new branch of psychology, behaviourism. He believed that you should only study those behaviours that could be observed and measured. The study of emotions or thoughts was considered to be an inappropriate area of study because it could not be directly observed. He did not believe that heredity was a significant factor in shaping human behaviour. A behaviourist's goal is to try to see which stimulus will elicit which response Watson is best known for his experiment with Albert, the 9month old baby boy. Albert was classically conditioned to fear a white rat. Initially the child showed no fear towards the rat and allowed the rat to crawl over him. Whenever Albert was playing with the rat, Watson began to sound a loud, deafening noise. The noise scared the child. Watson continued to pair the unpleasant noise with the appearance of the rat. After the two stimuli continued to be paired, Albert began to cry at the sighting of the rat. The child also carried this phobia to other small animals and other rat like objects. B. F. Skinner (1904 - 1990) Edward Lee Thorndike (1874 - 1949) Thorndike was a psychologist who worked on educational psychology and the psychology of animal learning. After studying animal intelligence, he formulated his well known "law of effect" which states behaviours are learned by trial and error or reward and punishment. He also found that having satisfying consequences will enhance the learned behaviour. Thorndike is best known for his experiments with the "puzzle boxes." The experiment placed a hungry cat into a puzzle box. The only way for a cat to escape was to successfully perform certain actions such as pulling a string or pushing a button. After plotting the time it took for several cats to escape, Thorndike found that the time the cat had to spend in the maze was Like Watson, Thorndike and Pavlov before him Skinner believed that psychologists should study predicting and controlling behaviour. His developed the theory of “operant conditioning”, a theory which dealt with the modification of voluntary behaviour through the use of consequences. Skinner was looking for the stimuli that control behaviour. He focused on changes in observable behaviour, ignoring the possibility of any processes occurring in the mind. Once he began to study, he became impressed with the effects of reinforcement and its effects of behaviour. He conducted experiments on animal behaviour using his now infamous “Skinner Box”. The Skinner box was a contraption that would automatically dispense food pellets and electric shocks. In this box a rat was asked to push a lever to receive food. Skinner found that the rat would not do much in the beginning. Skinner would help the rat begin to learn behaviours that would get closer and closer to pressing the lever. He used a process of teaching called “shaping” whereby he used positive reinforcement to reward the rat for “correct” behaviours. Skinner also conceptualized the first ever teaching machine as he felt one teacher was inadequate to properly reinforce thirty or more students in a classroom. His idea was that students could answer questions and the teaching machine would move students to the next level of difficulty depending on the answer. This was the roots of programmed instruction. BEHAVIOURISM IN EDUCATION Until the introduction of cognitivist and constructivist learning theories behaviourist techniques were employed in education to promote behaviour that is desirable and discourage that which is not. It was a widely popular theory because it is a relatively simple theory to understand and its positive and negative reinforcement techniques were found to be very effective both in animals, and in treatments for human disorders such as autism and antisocial behaviour. In addition to modern learning theories certain tools of behaviourism are still used by many teachers today, who reward or punish student behaviours using these reinforcement techniques. Educational implications of behaviourism: Emphasis on behaviour: students should be active respondents; people are most likely to learn when they actually have a chance to behave. Also, student learning must be evaluated; only measurable behaviour changes can confirm that learning has taken place. Drill and practice: repetition of stimulus-response habits strengthens those habits. Breaking habits: one way to break a stimulusresponse habit is to continue to present the stimulus until the individual is too tired to respond in the habitual way, or the exhaustion method. Also, the stimulus can be presented "faintly" so that the individual "learns" over time not to respond in the habitual manner, or the threshold method. Lastly, the incompatible stimulus method, would replace the habit with another habit, where eventually the individual adopts the "new" behaviour in response to the stimulus. Rewards: many theorists emphasize the importance of rewards or reinforcement for learning. Modern applications of behaviourist techniques There are two primary scenarios in which behaviourist learning theories excel. Firstly, the theory works well when the learner is focused on a clear goal and can respond automatically to the cues of that goal. During WWII the American army developed training videos to teach repetitive processes and found this to be an extremely successful technique. They also conditioned their pilots to react to silhouettes of enemy planes and these responses quickly became automatic. Also general skills that require a significant amount of integration between muscle memory and cognitive processing are usually successfully implemented in the behaviourist learning style. Examples would be learning skills such as surgery or learning to fly an airplane in a simulator. CRITICS OF BEHAVIOURISM Despite its success in many areas of application there have however been many critics of behaviourism since its inception. The major areas of dispute surround the limitations it puts on the learner and its inability to account for certain learning phenomena. Behaviourists believe that learning is an independent activity and since behaviourism disregards the activities of the mind, it does not account for all kinds of learning. Behaviourism is unable to explain learning that just occurs on its own when there is no reinforcement mechanism. An example of this would be new language patterns developed by young children. Also if solely dependent on a behaviourist learning style the learner may find themselves in a situation where the stimulus for the correct response does not occur, therefore the learner cannot respond. For example a worker who has been conditioned to respond to a certain cue at work stops production when an anomaly occurs because they do not understand the system. Another issue with behaviourism is that its mechanistic explanations of human behaviour are often perceived as somehow humiliating, an affront to human dignity. REFERENCES 1. Mergel, B. Instructional Design & Learning, 1998. http://www.usask.ca/education/coursework/802papers/ mergel/brenda.htm 2. Sandridge, M. Behaviourism, 2002. Available online: http://www.coe.uga.edu/epltt/Behaviorism.htm 3. Boothe, K. A and Walter, L. B., 1998. Behaviourist theories of learning. Available online: http://www.sil.org/linguaLinks/literacy/ImplementALit eracyProgram/BehavioristTheoriesOfLearning.htm 4. Graham, G., 2005.Behaviourism. In the Stanford Encyclopedia of Philosophy. Available online: http://plato.stanford.edu/entries/behaviorism/ 5. Behavioural Learning Theory. Available online: http://suedstudent.syr.edu/~ebarrett/ide621/behavior.htm 6. Beginning Instructional Design; Behaviourism. http://suedstudent.syr.edu/~ebarrett/ide621/behavior.htm