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Lecture 3

Lecture 3- September 13th.docx

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PSYC 2330
Francesco Leri

Tues Sept 13 2012 According to Hull, S-R associations become stronger as a function of how often they are followed by: a. stimuli that have weak incentive value b. stimuli that produce a drive c. stimuli that satisfy a need and reduce a drive  correct answer d. stimuli that are unexpected e. novel stimuli Drive Theory (Clark Hull)  Hulls model of behavior is mechanistic and based on homeostatic drive reduction  Habits (stimulus-response associations) become stronger as a function of how often they are followed by satisfying events. The reduction of a drive is satisfying  Drive-reduction model – all you try to do in life is to eliminate drives  Every time you satisfy a need and reduce a drive it is satisfying  Strength of behavior may be measured for e.g. as speed of consumption  The strength of behavior is the strength of the learned response multiplied by strength of drive  Number of reinforcement repetitions (R) = amount of training  Number of reactions to produce extinction (N) = how long will they persist once you remove the food, this will depend on how much training they receive  Drive is a general pool of energy that can activate innate and learned behaviors  There are several sources of drive,
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