_____ occurs when people require larger amounts of a drug to experience the same effects experienced during their initial usage

Infants who are wary of exploration, not easily soothed by the attachment figure, and angry or ambivalent about contact are displaying ________ attachment

a. anxious avoidant b. anxious resistant c. disorganized d. secure

In order to counteract the __________variable problem that affects correlational research, a psychologist might use the matched samples or matched pair technique

a. construct b. extraneous c. third d. random