Research conducted by Andy Meltzoff supports the conclusion that infants have the ability to imitate live facial expressions from what age?

Coleen goes to therapy because she is feeling sad. She often has periods of extreme sadness, and they typically last from six to eight months. During these times, she overeats, has trouble sleeping, feels exhausted all the time, and thinks a lot about dying. At other times, however, Coleen says she feels wonderful. During these periods, which last about a week, she gets a lot done, feels as if she can do anything, talks a lot and quickly, and doesn't sleep, or feel tired. She says her "up" times are great and have never caused her any trouble. Coleen's most likely diagnosis is __________.

A. major depressive disorder B. persistent depressive disorder C. bipolar I D. bipolar II

Most studies show that only 10% of college students and adults achieve formal operational thinking completely

Indicate whether the statement is true or false