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PREDOMINANTLY NEOUROPHYSIOLOGOCAL THEORY (Donald Olding Hebb)


PREDOMINANTLY  NEOUROPHYSIOLOGOCAL THEORY
Donald Olding Hebb

Donald Olding Hebb (July 22, 1904 – August 20, 1985) was a Canadian psychologist who was influential in the area of neuropsychology, where he sought to understand how the function of neurons contributed to psychological processes such as learning. He has been described as the father of neuropsychology and neural networks.[citation needed]
Early life
Donald Hebb was born in Chester, Nova Scotia, the oldest of four children of Arthur M. and M. Clara (Olding) Hebb, and lived there until the age of 16, when his parents moved to Dartmouth, Nova Scotia.
Donald's parents were both physicians. Donald's mother was heavily influenced by the ideas of Maria Montessori, and she home schooled him until the age of 8. He performed so well in elementary school that he was promoted to the 7th grade at 10 years of age. Although his rebellious attitude and disrespect for authority may have contributed to his failing the 11th grade, he graduated from the 12th grade two years later. (At that time in Chester, the 9th, 10th and 11th grades were taught in the same classroom by the same teacher. The year Donald failed the 11th grade, most (almost all?) of the students in the three grades failed the provincial exams and hence their year. Those failing the 9th and 10th years were moved to the next grade despite their failures. There was no 12th grade in Chester for Donald to be moved to and so he repeated the 11th grade. The following year, then living in Dartmouth, he successfully completed the 12th grade at Halifax County Academy in Halifax.)
The older of Donald's younger brothers, Andrew, obtained a law degree but went on to a career in journalism and then insurance. Donald's youngest brother, Peter, became a physician like his parents. And his sister, Catherine, eventually became a prominent physiologist. But Donald, early in life, had no aspirations toward psychology or the medical field; rather, he wanted to be a writer. He entered Dalhousie University aiming to become a novelist. He wasn't an exceptional student (his best subjects were math and science) but he graduated with a Bachelor of Arts degree in 1925. Afterward, he became a teacher, teaching at his old school in Chester. Later, he became a farmer in Alberta and then traveled around, working as a laborer in Quebec. During his travels he encountered the works of Sigmund Freud (which he regarded as "not too rigorous"), William James, and John B. Watson which made him consider joining the field of psychology.
At the age of 23, he asked William Dunlop Tait, the chairman of the psychology department at McGill University (a post Hebb would one day hold) what he'd have to do to get in and was given a reading list and told to come back in a year's time. During this year of study, he went back to teaching.
 Career
In 1928, he became a part-time graduate student at McGill University. But, at the same time, he was appointed headmaster of a troubled school in the suburbs of Montreal. He worked with two colleagues from the university, Kellogg and Clarke, to improve the situation. He took a more innovative approach to education—for example, assigning more interesting schoolwork and sending anyone misbehaving outside (making schoolwork a privilege).
In 1931, Hebb became bedridden because of tuberculosis in his hip. He used the time to read Charles Scott Sherrington's The Integrative Action of the Nervous System and Ivan Pavlov's Conditioned Reflexes. His master's thesis, written later that year, titled Conditioned and Unconditioned Reflexes and Inhibition, tried to show that skeletal reflexes were due to cellular learning. This he later dismissed as "nonsense, but no immediate disproof was available at the time." And yet, one of the men who later approved the thesis, Boris Babkin, had worked with Pavlov himself. At the very least, the thesis demonstrated the start of a thought process that would later lead to the Hebb synapse. Hebb passed cum laude. Babkin arranged for Hebb to do research on conditioning with Leonid Andreyev, another former member of Pavlov's laboratory.
Between 1933 and 1934, Hebb wrote a booklet titled Scientific Method in Psychology: A Theory of Epistemology Based on Objective Psychology. It was never published, but it contained many ideas that would become part of his later work.
By the beginning of 1934, Hebb's life was in a slump. His wife had died, following a car accident, on his twenty-ninth birthday (July 22, 1933). His work at the Montreal school was going badly. In his words, it was "defeated by the rigidity of the curriculum in Quebec's protestant schools." The focus of study at McGill was more in the direction of education and intelligence, and Hebb was now more interested in physiological psychology and was critical of the methodology of the experiments there.
He decided to leave Montreal and wrote to Robert Yerkes at Yale where he was offered a position to study for a PhD. Babkin, however, convinced Hebb to go study with Karl Lashley instead.
In July 1934, Hebb was accepted to study under Karl Lashley at the University of Chicago. His thesis was titled "The problem of spatial orientation and place learning". Hebb, along with two other students, followed Lashley to Harvard University in September, 1935. Here, he had to change his thesis. At Harvard, he did his thesis research on the effects of early visual deprivation upon size and brightness perception in a rat. That is, he raised rats in the dark and some in the light and compared their brains. In 1936, he got his PhD from Harvard.
The next year he worked as a research assistant to Lashley and as a teaching assistant in introductory psychology for Edwin G. Boring at Radcliffe College. His Harvard thesis was soon published, and he finished the thesis he started at University of Chicago.
In 1937, Hebb married his second wife, Elizabeth Nichols Donovan. That same year, on a tip from his sister Catherine (herself a PhD student with Babkin at McGill University), he applied to work with Wilder Penfield at the Montreal Neurological Institute. Here he researched the effect of brain surgery and injury on human brain function. He saw that the brain of a child could regain partial or full function when a portion of it is removed but that similar damage in an adult could be far more damaging, even catastrophic. From this, he deduced the prominent role that external stimulation played in the thought processes of adults. In fact, the lack of this stimulation, he showed, caused diminished function and sometimes hallucinations.
He also became critical of the Stanford-Binet and Wechsler intelligence tests for use with brain surgery patients. These tests were designed to measure overall intelligence, whereas Hebb believed tests should be designed to measure more specific effects that surgery could have had on the patient. Together with N.W. Morton, he created the Adult Comprehension Test and the Picture Anomaly Test.
Putting the Picture Anomaly Test to use, he provided the first indication that the right temporal lobe was involved in visual recognition. He also showed that removal of large parts of the frontal lobe had little effect on intelligence. In fact, in one adult patient, who had a large portion of his frontal lobes removed in order to treat his epilepsy, he noted "a striking post-operative improvement in personality and intellectual capacity." From these sorts of results, he started to believe that the frontal lobes were instrumental in learning only early in life.
In 1939, he was appointed to a teaching position at Queen's University. In order to test his theory of the changing role of the frontal lobes with age, he designed a variable path maze for rats with Kenneth Williams called the Hebb-Williams maze, a method for testing animal intelligence later used in countless studies. He used the maze to test the intelligence of rats blinded at different developmental stages, showing that "there is a lasting effect of infant experience on the problem-solving ability of the adult rat." This became one of the main principles of developmental psychology, later helping those arguing the importance of the proposed Head Start programs for preschool children in economically poor neighborhoods.
In 1942, he moved to Orange Park, Florida to once again work with Karl Lashley who had replaced Yerkes as the Director of the Yerkes Laboratories of Primate Biology at the Yerkes National Primate Research Center. Here, studying primate behavior, Hebb developed emotional tests for chimpanzees. The experiments were somewhat unsuccessful, however because chimpanzees turned out to be hard to teach. During the course of the work there, Hebb wrote The Organization of Behavior: A Neuropsychological Theory, his ground-breaking book that set forth the theory that the only way to explain behavior was in terms of brain function.
Afterward, he returned to McGill University to become a professor of psychology in 1947 and was made chairman of the department in 1948. Here he once again worked with Penfield, but this time through his students, which included Mortimer Mishkin, Haldor Enger Rosvold, and Brenda Milner, all of whom extended his earlier work with Penfield on the human brain.
His wife Elizabeth died in 1962. In 1966, Hebb married his third wife, Margaret Doreen Wright (née Williamson), a widow.
Hebb remained at McGill until retirement in 1972. He remained at McGill after retirement for a few years, in the Department of Psychology as an emeritus professor, conducting a seminar course required of all department graduate students. Afterward, in 1980, he returned to Dalhousie University as professor emeritus of psychology.
Donald Hebb died in 1985, two years after his wife, in Nova Scotia. He was survived by two daughters (both by his second marriage), Mary Ellen Hebb and Jane Hebb Paul.
 Honours and awards
Hebb was a member of the American Psychological Association (APA) and was its president in 1960. He won the APA Distinguished Scientific Contribution Award in 1961.
He was elected a Fellow of the Royal Society in March, 1966.
The Donald O. Hebb Award, named in his honor, is awarded to distinguished Canadian scientists.
 Work
 The Organization of Behavior (1949)
"The Organization of Behavior" is considered Hebb's most important book. A combination of his years of work in brain surgery mixed with his study of human behavior, it finally brought together the two realms of human perception that for a long time could not be connected properly. That is, it connected the biological function of the brain as an organ together with the higher function of the mind.
There were many theories on how the brain and the mind were connected. Pavlovian theories, for example, were based on a theory of stimulus and response, based on the belief that a path existed from sensory organs to the mind, which then made a response. The problem with the theory was that it was assumed that signals travel one way to the brain. It could not explain all the extra processing that adds to the input signals of human senses. Perhaps this was based on the fact that neurons themselves transmit in only one direction, but connections between various neurons are not necessarily one-way.
In 1929, Hans Berger discovered that the mind exhibits continuous electrical activity and cast doubt on the Pavlovian model of perception and response because, now, there appeared to be something going on in the brain even without much stimulus.
At the same time, there were many mysteries. For example, if there was a method for the brain to recognize a circle, how does it recognize circles of various sizes or imperfect roundness? To accommodate every single possible circle that could exist, the brain would need a far greater capacity than it has.
Another theory, the Gestalt theory, stated that signals to the brain established a sort of field. The form of this field depended only on the pattern of the inputs, but it still could not explain how this field was understood by the mind.
The behaviorist theories at the time did well at explaining how the processing of patterns happened. However, they could not account for how these patterns made it into the mind.
Hebb combined up-to-date data about behavior and the mind into a single theory. And, while the understanding of the anatomy of the brain did not advance much since the development of the older theories on the operation of the brain, he was still able to piece together a theory that got a lot of the important functions of the brain right.
His theory became known as Hebbian theory and the models which follow this theory are said to exhibit Hebbian learning. This method of learning is best expressed by this quote from the book:
When an axon of cell A is near enough to excite cell B and repeatedly or persistently takes part in firing it, some growth process or metabolic change takes place in one or both cells such that A's efficiency, as one of the cells firing B, is increased
This is often paraphrased as "Neurons that fire together wire together." It is commonly referred to as Hebb's Law.
The combination of neurons which could be grouped together as one processing unit, Hebb referred to as "cell-assemblies". And their combination of connections made up the ever-changing algorithm which dictated the brain's response to stimuli.
Not only did Hebb's model for the working of the mind influence how psychologists understood the processing of stimuli within the mind but also it opened up the way for the creation of computational machines that mimicked the biological processes of a living nervous system. And while the dominant form of synaptic transmission in the nervous system was later found to be chemical, modern artificial neural networks are still based on the transmission of signals via electrical impulses that Hebbian theory was first designed around.
 Hebb as an educator
Throughout his life Hebb enjoyed teaching and was very successful as a teacher. Both in his early years as a teacher and a headmaster in a Montreal school and in his later years at McGill University, he proved to be a very effective educator and a great influence on the scientific minds which were then his students.
As a professor at McGill, he believed that one could not teach motivation, but rather create the conditions necessary for students under which to do their study and research. One could train them to write, help them choose a problem to study, and even help keep them from being distracted, but the motivation and passion for research and study had to come from the students themselves. He believed that students should be evaluated on their ability to think and create rather than their ability to memorize and reprocess older ideas.
Hebb believed in a very objective study of the human mind, more as a study of a biological science. This attitude toward psychology and the way it is taught made McGill University a prominent center of psychological study.
Hebb also came up with the A/S ratio, a value that measures the brain complexity of an organism.
 Controversial Research
Hebb's name has often been invoked in discussions of the involvement of psychological researchers in interrogation techniques, including the use of sensory deprivation, because of his research into this field. Speaking at a Harvard symposium on sensory deprivation in June, 1958, Dr. Hebb is quoted as remarking:
The work that we have done at McGill University began, actually, with the problem of brainwashing. We were not permitted to say so in the first publishing.... The chief impetus, of course, was the dismay at the kind of “confessions” being produced at the Russian Communist trials. “Brainwashing” was a term that came a little later, applied to Chinese procedures. We did not know what the Russian procedures were, but it seemed that they were producing some peculiar changes of attitude. How? One possible factor was perceptual isolation and we concentrated on that
Recent research has argued that Dr. Hebb's sensory deprivation research was funded by and coordinated with the CIA (McCoy, 2007). Some of this research was done in secret, and the results were initially shared only with U.S. authorities. Some of this research involved volunteers who spent hours in sensory deprivation conditions that some argue should be considered torture,  although the subjects in his studies were university student volunteers[citation needed], not patients, and were free to quit the experiment at any time. Similar procedures, involving isolation chambers filled with heavily salted, neutrally buoyant water kept at body temperature, also served as the basis for techniques developed to enhance relaxation and meditation, which are still in use.

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Donald A. Norman


Donald A. Norman
Donald Arthur Norman (born December 25, 1935), is an academic in the field of cognitive science, design and usability and a co-founder and consultant with the Nielsen Norman Group. He is the author of the book The Design of Everyday Things.
Much of Norman's work involves the advocacy of Human Centered Design. His books all have the underlying purpose of furthering the field of design - from doors to computers. Norman has recently taken a controversial stance in saying that the design research community has had little impact in the innovation of products, and that whereas academics can help in refining existing products, it is technologists that accomplish the breakthroughs.
Norman splits his time between co-directing the dual-degree MBA and Engineering program Northwestern University and consulting with the Nielsen Norman Group. Dr. Norman announced that he will no longer teach full-time after the 2009-2010 academic year.
Norman is an active Distinguished Visiting Professor at the Korea Advanced Institute of Science & Technology where he spends two months a year teaching. He also holds the title of Professor Emeritus of Cognitive Science at the University of California, San Diego.
He is on numerous educational, private, and public sector advisory boards including the editorial board of Encyclopædia Britannica.
Early academics
In 1957 Norman received an Bachelor of Science in Electrical Engineering and Computer Science (EECS) from MIT. Norman continued through college until 1962, in the process earning M.S. in EECS and a Doctorate of Philosophy in Psychology from the University of Pennsylvania.
After graduating, Norman took up a Postdoctoral Fellowship at the Center for Cognitive Studies at Harvard University and within a year became a Lecturer.
After four years with the Center, Norman took a position as an Associate Professor in the Psychology Department at University of California, San Diego (UCSD). Although he started as an experimental and mathematical psychologist, Norman's focus shifted to cognitive science. Norman eventually became founding chair of the Department of Cognitive Science and chair of the Department of Psychology.
At UCSD, Norman was a founder of the Institute for Cognitive Science and one of the organizers of the Cognitive Science Society (along with Roger Schank, Allan Collins, and others), which held its first meeting at the UCSD campus in 1979.
 Cognitive engineering career
Norman made the transition from cognitive science to cognitive engineering by entering the field as a consultant and writer. The article "The Trouble with Unix" in Datamation catapulted him to a position of prominence in the computer world . Soon after, his career took off outside of academia, although he still remained active at UCSD until 1993. Norman continued his work to further human centered design by serving on numerous University and Government advisory boards such as with the Defense Advanced Research Projects Agency (DARPA). He currently serves on numerous committees and advisory boards like at Motorola, the Toyota Information Technology Center, TED Conference, Panasonic, Encyclopædia Britannica and many more.
Norman published several important books during his time at UCSD, one of which, User Centered System Design, obliquely referred to the university in the initials of its title.
In 1995, Norman left UCSD to join Apple Computer, initially as an Apple Fellow as a User Experience Architect (The first to use the phrase User Experience in a title), and then as the Vice President of the Advanced Technology Group. He later worked for Hewlett-Packard before joining with Jakob Nielsen to form the Nielsen Norman Group in 1998. He returned to academia as a professor of computer science at Northwestern University where he is co-Director of the Segal Design Institute.
Norman has received many awards for his work. He received an honorary degree from the University of Padua in Padua, Italy. In 2001 he was inducted as a Fellow of the Association for Computing Machinery, and in 2006 received the Benjamin Franklin Medal in Computer and Cognitive Science.
 User centered design
In his book The Design of Everyday Things, originally titled The Psychology of Everyday Things, Norman describes the psychology behind what he deems good and bad design, through case studies, and proposes design principles. He exalts the importance of design in our everyday lives, and the consequences of errors caused by bad design.
In the book, Norman uses the term "user-centered design" to describe design based on the needs of the user, leaving aside what he deems secondary issues like aesthetics. User-centered design involves simplifying the structure of tasks, making things visible, getting the mapping right, exploiting the powers of constraint, designing for error, explaining affordances and seven stages of action.

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Albert Bandura

Albert Bandura

Albert Bandura (born December 4, 1925, in Mundare, Alberta, Canada) is a psychologist and the David Starr Jordan Professor Emeritus of Social Science in Psychology at Stanford University. Over a career spanning almost six decades, Bandura has been responsible for groundbreaking contributions to many fields of psychology, including social cognitive theory, therapy and personality psychology, and was also influential in the transition between behaviorism and cognitive psychology. He is known as the originator of social learning theory and the theory of self-efficacy, and is also responsible for the influential 1961 Bobo Doll experiment.

A 2002 survey ranked Bandura as the fourth most-frequently cited psychologist of all time, behind B.F. Skinner, Sigmund Freud, and Jean Piaget, and as the most cited living one. Bandura is widely described as the greatest living psychologist,  and as one of the most influential psychologists of all time. 

In 2008 Bandura won the Grawemeyer Award in Psychology.

Personal life


Bandura was born in Mundare, in Alberta, a small town of roughly four hundred inhabitants, as the youngest child, and only son, in a family of eight. Bandura is of Ukrainian and Polish descent.

The summer after finishing high school, Bandura worked in the Yukon to protect the Alaska Highway against sinking. Bandura later credited his work in the northern tundra as the origin of his interest in human psychopathology.

Bandura is married and has two children.

 Education and academic career


Bandura's introduction to academic psychology came about by chance; as a student with little to do in the early mornings, he took a psychology course to pass the time, and became enamored of the subject. Bandura graduated in three years, in 1949, with a B.A. from the University of British Columbia, winning the Bolocan Award in psychology, and then moved to the then-epicenter of theoretical psychology, the University of Iowa, from where he obtained his M.A. in 1951 and Ph.D. in 1952. Arthur Benton was his academic adviser at Iowa, giving Bandura a direct academic descent from William James, while Clark Hull and Kenneth Spence were influential collaborators. During his Iowa years, Bandura came to support a style of psychology which sought to investigate psychological phenomena through repeatable, experimental testing. His inclusion of such mental phenomena as imagery and representation, and his concept of reciprocal determinism, which postulated a relationship of mutual influence between an agent and its environment, marked a radical departure from the dominant behaviorism of the time. Bandura's expanded array of conceptual tools allowed for more potent modeling of such phenomena as observational learning and self-regulation, and provided psychologists with a practical way in which to theorize about mental processes, in opposition to the mentalistic constructs of psychoanalysis and personology.

 Post-doctoral work


Upon graduation, he participated in a clinical internship with the Wichita Kansas Guidance Center. The following year, he accepted a teaching position at Stanford University in 1953, which he holds to this day.  In 1974 the American Psychological Association elected him as its president.

 Research


Bandura was initially influenced by Robert Sears' work on familial antecedents of social behavior and identificatory learning, Bandura directed his initial research to the role of social modeling in human motivation, thought, and action. In collaboration with Richard Walters, his first doctoral student, Bandura engaged in studies of social learning and aggression. Their joint efforts illustrated the critical role of modeling in human behavior and led to a program of research into the determinants and mechanisms of observational learning.

 Social Learning Theory


The initial phase of Bandura's research analyzed the foundations of human learning and the propensity of children and adults to imitate behavior observed in others. (It is a common mistake, even among psychologists, to confuse the words 'imitate' and 'model.' For example, a child patterns, but does not 'model' his behavior after someone else; he displays or imitates new behavior acquired by observing a model.)

 Analysis of aggression


Bandura's research with Walters led to his first book, Adolescent Aggression in 1959, and to a subsequent book, Aggression: A Social Learning Analysis in 1973. During a period dominated by behaviorism in the mold of B.F. Skinner, Bandura believed the sole behavioral modifiers of reward and punishment in classical operant conditioning were inadequate as a framework, and that many human behaviors were learnt from other humans. Bandura began to analyze means of treating unduly aggressive children by identifying sources of violence in their lives. Initial research in the area had begun in the 1940s under Neal Miller and John Dollard; Bandura's continued work in this line eventually culminated in the Bobo doll experiment, and in 1977's enormously influential treatise, Social Learning Theory.  Many of Bandura's innovations came from his focus on empirical investigation and reproducible investigation, which were alien to a field of psychology dominated by the theories of Freud.

 The Bobo Doll experiment

In 1961 Bandura conducted a controversial experiment known as the Bobo doll experiment, to study patterns of behavior associated with aggression. Bandura hoped that the experiment would prove that aggression can be explained, at least in part, by social learning theory, and that similar behaviors were learned by individuals shaping their own behavior after the actions of models. The experiment was criticized by some on ethical grounds, for training children towards aggression. Bandura's results from the Bobo Doll Experiment changed the course of modern psychology, and were widely credited for helping shift the focus in academic psychology from pure behaviorism to cognitive psychology. The experiment is among the most lauded and celebrated of psychological experiments.

 Social cognitive theory


By the mid-1980s, Bandura's research had taken a more holistic bent, and his analyses tended towards giving a more comprehensive overview of human cognition in the context of social learning. The theory he expanded from social learning theory soon became known as social cognitive theory.

 Social Foundations of Thought and Action


In 1986, Bandura published Social Foundations of Thought and Action: A Social Cognitive Theory (see article), in which he reconceptualized individuals as self-organizing, proactive, self-reflecting, and self-regulating, in opposition to the orthodox conception of humans as governed by external forces. Bandura advanced concepts of triadic reciprocality, which determined the connections between human behavior, environmental factors, and personal factors such as cognitive, affective, and biological events, and of reciprocal determinism, governing the causal relations between such factors. Bandura's emphasis on the capacity of agents to self-organize and self-regulate would eventually give rise to his later work on self-efficacy.

 Self-efficacy


In 1963 Bandura published Social Learning and Personality Development. In 1974 Stanford University awarded him an endowed chair and he became David Starr Jordan Professor of Social Science in Psychology. In 1977, Bandura published the ambitious Social Learning Theory, a book that altered the direction psychology took in the 1980s.[citation needed]

In the course of investigating the processes by which modeling alleviates phobic disorders in snake-phobics, Bandura found that self-efficacy beliefs (which the phobic individuals had in their own capabilities to alleviate their phobia) mediated changes in behavior and in fear-arousal. He then launched a major program of research examining the influential role of self-referent thought in psychological functioning. Although he continued to explore and write on theoretical problems relating to myriad topics, from the late 1970s he devoted much attention to exploring the role that self-efficacy beliefs play in human functioning.

In 1986 Bandura published Social Foundations of Thought and Action: A Social Cognitive Theory (see article), a book in which he offered a social cognitive theory of human functioning that accords a central role to cognitive, vicarious, self-regulatory and self-reflective processes in human adaptation and change. This theory has its roots in an agentic perspective that views people as self-organizing, proactive, self-reflecting and self-regulating, not just as reactive organisms shaped by environmental forces or driven by inner impulses. Self-efficacy: The exercise of control was published in 1997.

 Awards


Bandura has received more than sixteen honorary degrees, including those from the University of British Columbia, Alfred University, the University of Rome, the University of Lethbridge, the University of Salamanca in Spain, Indiana University, the University of New Brunswick, Penn State University, Leiden University, and Freie Universitat Berlin, the Graduate Center of the City University of New York, Universitat Jaume I in Spain, the University of Athens and the University of Catania. In 1999 he received the Thorndike Award for Distinguished Contributions of Psychology to Education from the American Psychological Association, and in 2001, he received the Lifetime Achievement Award from the Association for the Advancement of Behavior Therapy. He is also the recipient of the Outstanding Lifetime Contribution to Psychology Award from the American Psychological Association and the Lifetime Achievement Award from the Western Psychological Association, the James McKeen Cattell Award from the American Psychological Society, and the Gold Medal Award for Distinguished Lifetime Contribution to Psychological Science from the American Psychological Foundation. In 2008, he received the Grawemeyer Award for contributions to psychology.

 



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Edward Chace Tolman


Edward Chace Tolman
Edward Chace Tolman (April 14, 1886 – November 19, 1959) was an American psychologist. He was most famous for his studies on behavioral psychology.
Born in West Newton, Massachusetts, brother of CalTech physicist Richard Chace Tolman, Edward C. Tolman studied at the Massachusetts Institute of Technology, and received his Ph.D. from Harvard University in 1915. Most of his career was spent at the University of California, Berkeley (from 1918 to 1954), where he taught psychology.
Tolman is best known for his studies of learning in rats using mazes, and he published many experimental articles, of which his paper with Ritchie and Kalish in 1946 was probably the most influential. His major theoretical contributions came in his 1932 book, Purposive Behavior in Animals and Men, and in a series of papers in the Psychological Review, "The determinants of behavior at a choice point" (1938), "Cognitive maps in rats and men" (1948) and "Principles of performance" (1955). 
Although Tolman was firmly behaviorist in his methodology, he was not a radical behaviorist like B. F. Skinner. As the title of his 1932 book indicates, he wanted to use behavioral methods to gain an understanding of the mental processes of humans and other animals. In his studies of learning in rats, Tolman sought to demonstrate that animals could learn facts about the world that they could subsequently use in a flexible manner, rather than simply learning automatic responses that were triggered off by environmental stimuli. In the language of the time, Tolman was an "S-S" (stimulus-stimulus), non-reinforcement theorist: he drew on Gestalt psychology to argue that animals could learn the connections between stimuli and did not need any explicit biologically significant event to make learning occur. This is known as latent learning. The rival theory, the much more mechanistic "S-R" (stimulus-response) reinforcement-driven view, was taken up by Clark L. Hull.
A key paper by Tolman, Ritchie and Kalish in 1946 demonstrated that rats that had explored a maze that contained food while they were not hungry were able to run it correctly on the first trial when they entered it having now been made hungry. However, Hull and his followers were able to produce alternative explanations of Tolman's findings, and the debate between S-S and S-R learning theories became increasingly convoluted and sterile. Skinner's iconoclastic paper of 1950, entitled "Are theories of learning necessary?" persuaded many psychologists interested in animal learning that it was more productive to focus on the behavior itself rather than using it to make hypotheses about mental states. The influence of Tolman's ideas declined rapidly in the later 1950s and 1960s. However, his achievements had been considerable. His 1938 and 1955 papers, produced to answer Hull's charge that he left the rat "buried in thought" in the maze, unable to respond, anticipated and prepared the ground for much later work in cognitive psychology, as psychologists began to discover and apply decision theory - a stream of work that was recognized by the award of a Nobel prize to Daniel Kahneman in 2002. And his 1948 paper introduced the concept of a cognitive map, which has found extensive application in almost every field of psychology, frequently among scientists who have no idea that they are using ideas first formulated to explain the behavior of rats in mazes.
Furthermore, when in the last quarter of the twentieth century animal psychologists took a cue from the success of human cognitive psychology, and began to renew the study of animal cognition, many of them turned to Tolman's ideas and to his maze techniques. Of the three great figures of animal psychology of the middle twentieth century, Tolman, Hull and Skinner, it can reasonably be claimed that it is Tolman's legacy that is currently the liveliest, certainly in terms of academic research.[citation needed] He was elected a Fellow of the American Academy of Arts and Sciences in 1949.
Tolman was much concerned that psychology should be applied to try and solve human problems, and in addition to his technical publications, he wrote a book called Drives Toward War. He was one of the senior professors whom the University of California sought to dismiss in the McCarthyite era of the early 1950s, because he refused to sign a loyalty oath - not because of any lack of felt loyalty to the United States but because it infringed on academic freedom. Tolman was a leader of the resistance of the oath, and when the Regents of the University of California sought to fire him, he sued. The resulting court case, Tolman v. Underhill, led to the California Supreme Court in 1955 overturning the oath and forcing the reinstatement of all those who had refused to sign it. In 1963, at the insistence of the then President of the University of California Clark Kerr, the University named its newly constructed Education and Psychology faculty building at Berkeley "Tolman Hall" in his honor; his widow was present at the dedication ceremony. His portrait hangs in the entrance hall of the building.


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