What are some of the disadvantages associated with longitudinal studies?

In _____, the therapist confronts the feared object or situation while the person suffering from the phobia observes.

A)modeling B)social skills training C)systematic desensitization D)flooding

Your best friend had her baby three months ago. After visiting with them on a couple of occasions, it appears to you that her infant seems sad. You remember from your developmental course that infants can be sad. What else do you suspect?

a. Your friend's marriage is not going well. b. Your friend is likely depressed. c. You are probably mistaken about your friend's infant. d. The sadness is just a temporary phase that all infants pass through.