Of the thousands of infants and parents observed in the Strange Situation procedure, approximately _____ percent show secure attachment

Around _____ percent of all adults may experience an episode of severe unipolar depression at some point in their lives.

A) 6 B) 18 C) 28 D) 42

Which of these relationships would be least likely to be investigated with a

correlational approach? (a) between IQs of identical twins (b) between ACT scores and SAT scores on the same set of people (c) between the heights and weights of the players on a basketball team (d) between the dosage of a drug and the intensity of the response (e) between age and general health