PSYCH 2GG3 Lecture 3: Effects of Behaviour: Hull’s variables
Document Summary
Graphic summary of hull"s system input variables (red)- intervening variables (green and purple) output variables (blue) input variables: predictors. Input variables (stimuli): the information the psychologist needs to correctly predict how a person will respond. The reward attached to responding (w) intervening variables: Determine whether a response will occur for a stimulus. These intervening variables (what we cannot account for) is what results in different results in different individuals. Most important of hull"s intervening variables include: habit strength. Habit strength (shr), is defined as the strength of the bond between a specific stimulus and response: drive. Drive (d) is a motivational concept closely tied with reinforcement. Drive has three central functions in hull"s theory: The physical intensity of a stimulus increases the probability that a response will occur (pavlov). Stimulus-intensity (v) dynamism interacts with habit strength and drive to determine the probability of a response: incentive motivation. Previous reinforcements can change the incentive value of subsequent rewards.
