Flashcards in Stimulus Control and Generalization Deck (28):
Stimulus control occurs when...
the rate, latency, duration of response is altered in the presence of an antecedent stimulus.
Stimulus control is acquired when...
Responses are reinforced in the presence of a specific stimulus (Sd) and not in the presence of other stimuli (S^).
Sd -> response -> Sr+
phone rings -> pick up phone -> conversation
S^ -> response -> S
doorbell -> pick up phone -> no conversation
A class of behaviour created through differential reinforcement with respect to stimulus properties.
Events that precede operants and set the occasion for the behaviour to occur.
Two antecedent stimuli (Sd and S^).
Responses that occur in presence of Sd are reinforced, and responses that occur in presence of S^ are not.
Stimuli that share similar physical characteristics with the controlling stimulus evokes the same behaviour as the controlling stimulus.
The spread of effects of reinforcement during one stimulus to another stimulus differing from the original along one or more physical dimensions.
Little discrimination =
Greater discrimination =
Sd and S^ alternate usually randomly
Sd and S^ presented at the same time
select from two or more comparison stimuli.
3 elements of simple discrimination
Discriminative stimulus, response, and consequence
4 elements of conditional discrimination
Conditional stimuli, antecedent stimuli, responses, and consequences.
Researcher decides the links between the stimuli
Physical similarity controls the response.
Error-less discrimination training
Start with the Sd and gradually introduce S^
Stimulus generalization within a class of stimuli and stimulus discrimination between classes of stimuli
Pigeons tested with novel pictures of people and trees. Showed concept-formation
Herrnstein et al (1976)
Chickens and grey coloured squares
Feature stimulus class
Share common physical forms, relative relationship and developed through stimulus generalization.
Arbitrary stimulus class
No common features, developed using stimulus equivalence.
A prerequisite skill for stimulus control. May need to be taught before stimulus control procedures are implemented.
Prominence of the stimulus in the environment. Increases rate of acquisition.
Mask a response due to your previous history with that stimulus