Answer:
stimulus generalization
Step-by-step explanation:
Stimulus generalization: In psychology, the term stimulus generalization takes place in both operant conditioning and classical conditioning. It refers to the process of responding similarly to identical stimuli of formerly conditioned stimuli.
Example: In the given question, the child tends to experience fear whenever the child sees anyone wearing a white coat because during immunization the doctor was wearing a white coat. Hence, the child is experiencing stimulus generalization.