Apsychologist attributes a boy's poor social skills to his lack of contact with children who model appropriate behavior. the psychologist is using which approach to

behavioral/social learning.                                                                                                                      

Explanation:  

Social learning approach or theory was proposed by Albert Bandura and is defined as social behavior and learning process theory that states a new behavior in an organism including humans and animals are acquired or gained through imitating or observing another person or animal.

In social learning or behavioral learning, an individual tend to learn specific thing via modeling process of another person.

In the question above, the given statement signifies the importance of social and behavioral learning.