In Watson and Rayner's study, little Albert was conditioned to fear a white rat. Later, Albert showed a fear of similar objects, such as a white rabbit, balls of cotton, and a white stuffed animal. This is an example of stimulus

This is an example of  conditioned stimulus of Generalization.

When two stimuli are paired a learning process occurs which is called as classical conditioning. A classically conditioned response will vary to an extent of only slight difference form those responses that are attained from those things that are the close resemblance of original.

Generalization refers to the occurrence of the stimulus that is very identical to the previously  conditioned stimulus and will be producing the same response as attained from the original stimulus. It is in contracts to the Stimulus discrimination.In the given example, Albert showed a fear of similar objects which are of white. This is an example of generalization of classical conditioning.

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