If I wanted to see if a correlation coefficient was different from zero, I would use a:

Seven-month-old Lydia looked away and started to fuss when her mother's college roommate, who hadn't visited since Lydia was born, got Lydia up from her nap. Lydia's reaction is most likely the result of

a. social referencing. c. insecure attachment. b. systematic desensitization. d. stranger wariness.

Piaget believed that __________ leads to internal images of experience, which children then label with words

A) imagination B) intentional behavior C) sensorimotor activity D) role playing