A child received an immunization by a doctor who was wearing a white lab coat. Since that time the child experiences fear any time he sees anyone wearing a white garment. This is: acquisition spontaneous recovery stimulus generalization stimulus discrimination.

stimulus generalization

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.