Monday, February 16, 2009

GUTHRIE THEORY

GUTHRIE THEORY

Law of Contiguity:

Guthrie's law of contiguity states that a combination of stimuli which has accompanied a movement will on its recurrence tend to be followed by that movement (Guthrie, 1952). He said that all learning is based on a stimulus-response association. Movements are small stimulus- response combinations. These movements make up an act. A learned behavior is a series of movements. It takes time for the movements to develop into an act. He believed that learning is incremental. Some behavior involves repetition of movements and what is learned are movements, not behaviors (Internet, 1999).

Guthrie stated that each movement produces stimuli and the stimuli then become conditioned. Every motion serves as a stimulus to many sense organs in muscles, tendons and joints. Stimuli which are acting at the time of a response become conditioners of that response.

Movement-produced stimuli have become conditioners of the succession of movements. The movements form a series often referred to as a habit. Our movements are often classified as forms of conditioning or association. Some behavior involves the repetition of movements, so that conditioning can occur long after the original stimulus.

Guthrie rejected the law of frequency. He believed in one-trial learning. One-trial learning states that a stimulus pattern gains its full associative strength on the occasion of its first pairing with a response. He did not believe that learning is dependent on reinforcement. He defined reinforcement as anything that alters the stimulus situation for the learner (Thorne and Henley, 1997). He rejected reinforcement because it occurs after the association between the stimulus and the response has occurred. He believed that learning is the process of establishing new stimuli as cues for some specified response (Sills, 1968).

Guthrie believed that the recency principle plays an integral role in the learning process. This principle states that which was done last in the presence of a set of stimuli will be that which is done when the stimulus combination occurs again. He believed that it is the time relation between the substitute stimulus and the response that count. Associative strength is greater when the association is novel. When two associations are present with the same cue, the more recent will prevail. The stimulus-response connections tend to grow weaker with elapsed time.

Contiguity theory implies that forgetting is a form of retroactive or associative inhibition. Associative inhibition occurs when one habit prevents another due to some stronger stimuli. Guthrie stated that forgetting is due to interference because the stimuli become associated with new responses (Internet, 1999). He believed that you can use sidetracking to change previous conditioning. This involves discovering the initial cues for the habit and associating other behavior with those cues. Sidetracking causes the internal associations to break up. It is easier to sidetrack than to break a habit. Other methods used to break habits include threshold, fatigue, and the incompatible response method. Fatigue is a change in behavior-altered chemical states in the muscle and blood stream. It has the effect of decreasing the conditioned response. The stimulus conditions the other responses thus inhibiting the response.

The threshold method involves presenting cues at such low levels that the response does not occur. The stimulus is then increased thus raising the response threshold. The incompatible stimulus method involves presenting the stimulus for the behavior we want to remove when other aspects of the situation will prevent the response from occurring (Thorne and Henley, 1997). Excitement facilitates learning and also the stereotyping of a habit. It is the conflict responsible for the excitement that breaks up the old habit. Breaking up a habit involves finding the cues that initiate the action and practicing another response to such cues.

GUTHRIE EXPERIMENT


GUTHRIE EXPERIMENT


Guthrie did a collaborative study with George P. Horton which involved the stereotyped behavior of cats in the puzzle box. Horton set up the trials and supervised the photography, while Guthrie took notes in shorthand. The Guthrie-Horton experiment illustrated the associative theory of learning. They used a glass paneled box which allowed them to photograph the cats' movements. The box was constructed so that the cat could open the door by touching a post. It took approximately 15 minutes for the cat to touch the post.

The second time, the cat had the tendency to duplicate its first behavior. The photographs showed that the cats repeated the same sequence of movements associated with their previous escape from the box. This showed an example of stereotyped behavior. The Guthrie-Horton experiment allows us to assume than an animal learns an association between a stimulus and a behavioral act after only one experience. Guthrie stated that numerous trials are not duplications, but learning to respond to similar stimulus complexes. Only after we form several associations can the behavioral criterion of learning be achieved

EDWIN R.GUTHRIE IMPLICATIONS

EDWIN R.GUTHRIE IMPLICATIONS

Guthrie used the contiguity theory while teaching at the University of Washington. "We learn only what we ourselves do" . The responses we wish to cue to various stimuli must be made by the individual himself in the presence of those stimuli . He extends this philosophy when emphasizing that circumstances must be changed in order to further learning. Teachers often limit their involvement in the classroom in order to further student learning.

By doing this, they allow the student to make the desired responses without stimuli from the teacher. Guthrie had a large interest in the evaluation of teaching ability. He stressed the idea that the circumstances under which he wishes the desired response to be made in the future should be approximated as closely as possible by the present circumstances .

Although Guthrie's theory of contiguity has been criticized for its simplicity, it remains popular to many psychologists due to its use of simple terms in illustrating complex ideas.


Sunday, February 15, 2009

KURT LEWIN :INTRODUCTION


KURT LEWIN :INTRODUCTION

· Born on September 9, 1890
· 1914 - Joined the German army.
· 1916 - Earned a Ph.D. from the University of Berlin.
· 1921 - Became a lecturer at the Psychological Institute of the University of Berlin.
· 1932 - Emigrated to the United States.
· 1935 - Became a professor at the University of Iowa; published A Dynamic Theory of Personality.
· 1944 - Established research center at MIT.
· Died at age 57 on February 12, 1947 of a heart attack.

Kurt Lewin's Early Life:

Born in Prussia to a middle-class Jewish family, Kurt Lewin moved to Berlin at age 15 to attend the Gymnasium. He enrolled at the University of Frieberg in 1909 to study medicine before transferring to the University of Munich to study biology. He eventually completed a doctoral degree at the University of Berlin.

It was during his studies that he first developed an interest in Gestalt psychology. He volunteered for the German army in 1914 and was later injured in combat. These early experiences had a major impact on the development of his Field Theory and later study of group dynamics.

Career:

In 1921, Kurt Lewin began lecturing on philosophy and psychology at the Psychological Institute of the University of Berlin. His popularity with students and prolific writing drew the attention of Stanford University, which invited him to be a visiting professor in 1930. Eventually, Lewin emigrated to the U.S. and took a teaching position at the University of Iowa, where he worked until 1944.

While Lewin emphasized the importance of theory, he also believed that theories needed to have practical applications. He began applying his research to the war effort, working for the U.S. government. Lewin also established the Group Dynamics at Massachusetts Institute of Technology (MIT) and the National Training Laboratories (NTL). Lewin died of a heart attack in 1947.

LEWIN'S FIELD THEORY


LEWIN'S FIELD THEORY

"Field theory," an application derived from Gestalt theory involving a view of social activities and personality dynamics, received a most articulate expression in Kurt Lewin’s work. In the Gestalt tradition, Lewin argued that personality should be viewed in the context of a dynamic field of individual-environmental interactions.

Lewin believed this "field" to be a Gestalt psychological environment existing in an individual's or in the collective group’s mind at a certain point in time that can be mathematically described in a topological constellation of constructs. Lewin’s model of the "interactive field" of an individual is based on his notion of "hodological space," which is defined as a geometrical system emphasizing a) movement along psychologically directed pathways, b) the dynamics of person-environment interactions, and c) the person’s behavior at environmental obstacles or barriers. The person is viewed in terms of an individual life space, containing not only the predominance of the present hodological space with psychologically directed pathways of movement, but also representations of the past experiences and future expectations.

This "field" is very dynamic, changing with time and experience. When fully constructed, an individual's "field" (Lewin used the term "life space") describes that person's motives, values, needs, moods, goals, anxieties, and ideals. Lewin believed that changes of an individual's "life space" depend upon that individual's internalization of external stimuli (from the physical and social world) into the "life space."

Although Lewin did not use the word "experiential," (see experiential learning) he nonetheless believed that interaction (experience) of the "life space" with "external stimuli" (at what he called the "boundary zone") were important for development (or regression). For Lewin, development (including regression) of an individual occurs when their "life space" has a "boundary zone" experience with external stimuli. It is not merely the experience that causes change in the "life space," but the acceptance (internalization) of external stimuli.

LEWIN'S APPROACH TO PERSONALITY

LEWIN'S APPROACH TO PERSONALITY

Lewin emphasized the explanation of human behavior in terms of the forces and tensions that move us to action. Unlike Wertheimer, Kohler, and Koffka, who started with perception and then moved to behavior, Lewin began with behavior and what produces it, and then moved on to the problems of how people perceived their own and others' behavior. When a perceptual set (described below) affected the way learned associations were expressed, Lewin saw it as conflict between competing determining tendencies. In both laboratory and world, he held, a person's behavior is always oriented toward some goal. The person is always trying to do something. That intention or determining tendency is what matters most.

Associations, held Lewin, are not sources of energy,but just links or connections "like the couplings between the cars of railroad train which do nothing except transmit the energy supplied by the locomotiveLewin declared, "Psychology cannot try to explain eerything with a single construct, such as association, instinct, or gestalt. A variety of constructs has to be used. They should be interrelated, however, in a logically precise manner. "
Intentions and intentional actions, he held, do not result from simply a stimulus here or a reinforcer there. They follow "field principles." We have to look for psychological forces and intensions that arise from motives, and at goals, and at how people perceive the situation,.
Lewin did not try to relate psychological forces to physical forces, except in the descriptive names like "vector." He did not address the question of how motives originate, whether in insinct or previous experience, but rather focused on how they operate.

Lewin viewed the person as system containing subsystems that are more or less separate and more or less able to interact and combine with each other. "One subsystem," writes Woodworth, "might be friendship for a certain person; another might be love for a certain sport. When a person is intent on reaching a goal, one of his subsystem is in a state of tension". If he is interrupted, this subsystem remains tense for some time and cause him to resume the activity once the interruption is gone. Or if it can't be resumed, an activity that's somehow similar can substitute for it and drain off the tension. A repetitive task will eventually drain off all the tension in its subsystem, leaving a state of satiation. With continued activity this spreads to related subsystems. ("Cosatiation.")

The structure of a person includes an outer region called the perceptual-motor region that is in contact with the psychological environment, and a central portion called the inner-personal region. Thhe inner-personal region is divided into cells that represent tension systems.
As a child develops, the personality system expands and differentiates. His view of the psychological environment is subject to cognitive restructuring--it becomes better understood and he does a better job of distinguishing between the real world and the "irreal" world of wishes and fears. The child finds new social roles and learns new social norms and codes.

KURT LEWIN'S: LIFE SPACE


KURT LEWIN'S: LIFE SPACE



What do you include in your field of perception and action? If you're lucky, to some degree your life space is determined by you. For others, it's largely determined by your environment and the people you're in association with.

Life space includes:
The places where you physically go, the people and events that occur there, and your feelings about the place and people. One part of this is the places you inhabit every day, or at least regularly. Another part is places you've been to, but go only very occasionally or may never go back to again.

Your vicarious life-space (my term, not Lewin's), includes the world you travel into through reading, movies, TV, what other people say, etc.

Then there is also your own personal mental life space--the places you habit in your mind, your fantasy world, etc. This was of great concern to Jung, although he did not use this term for it, but of less interest to Lewin who was most interested in our social world.

you're planning what to do tomorrow, your life-space is not the room you're in now but the place where you expect to be tomorrow. Your present locomotion in that expected environment involves deciding on one course of action rather than another, as a result of vectors that impel you in one or another direction.

The person and the psychological environment are divided into regions that undergo differentiation. Regions are connected when a person can perform a locomotion between them. Locomotion includes any kind of approach or withdrawal--even looking at a pretty object or away from an ugly one, or listening to liked music and avoiding disliked or uninteresting music. They are said to be connected when communication can take place between them. The region that lies just outside the life-space is the foreign hull. The person is a differentiated region in the life space, set apart from the psychological environment by a boundary. A barrier may block the locomotion called for by vectors. A barrier exerts no force until force is exerted on it. Then it may yield, or resist strongly. How rigid it is you can find out only by exploration. You may have a plan that another person doesn't like, but you don't know how strongly he'll resist your carrying it out until you try. An impassible barrier is likely to acquire a negative valence and may lead to cursing or attacking it.

An awakened need is a state of tension, a readiness for action but without specific direction. When a suitable object is found, it acquires positive valence, and a vector then directs locomotion toward the object. Excessive tension may blur the person's perception of the environment, so that he doesn't find a suitable object to reduce the tension.

(I sometimes do an activity in which people have big sheets of paper and draw their own physical life-spaces, complete with an indication of how they feel in each place. Then each person explains his or her drawing to half-a-dozen or so others. This tends to give group members an understanding of the others that they might never have had otherwise.)

Your perception of yourself and your relationship with yourself shifts as your life-space shifts.
How do you go about changing your life-space when you do so? If you're a member of a group, your life-space as a member of the group is a developmental process of some kind.

A limitation of Lewin's method of diagramming the life space was difficulty representing B's life space as a factor operating in A's life-space.