Suppose that the sample regression equation of a model is 
.If we examine the relationship between x1 and y for four different values of x2,we observe that the four equations produced differ only in the intercept term.
Definitions:
Disinhibition
When the conditioned stimulus elicits a conditioned response (CR) after a novel stimulus is presented during extinction
Novel Stimulus
A new or unfamiliar stimulus that has not been previously experienced by an organism.
Conditioned Response
A response that is acquired due to the association of a neutral stimulus with an unconditioned stimulus, leading to a conditioned reaction.
Behavioral Contrast
A phenomenon where the rate of response to a stimulus changes when the conditions of reinforcement for another stimulus are altered.
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