Oxytocin plays a broad role in regulating many behaviors generally involved in happiness, including pregnancy, parenthood, sexual activity, social bonding, trust, and the reduction of stress reactions, and is released by the __________ gland

In a ________ study, both the researchers and the participants are unaware of the group assignments.

A. control B. double-blind C. pilot D. randomly assigned

With respect to the criteria used to label behavior as "abnormal,"

a. none of the criteria are necessary conditions shared by all cases of abnormality. b. only the criterion of "statistical rarity" is common to all cases of abnormal behavior. c. only the criterion of "personal distress or disabled functioning" is a necessary condition shared by all cases of abnormality. d. the criterion of "maladaptiveness" is a sufficient condition, but not a necessary condition shared by all cases of abnormality.