A threat to internal validity in which extreme scores, upon retesting, tend to be less extreme is called

a. a time-series confound

Evolutionary theory tries to explain why

a. many people die in middle adulthood. b. evolution selected for people who lived too close to the maximum age expectancy. c.many diseases that affect older adults have endured evolutionary change. d. body parts wear out after years of use.

Once reactive attachment disorder or disinhibited social engagement disorder is identified, therapeutic support focuses on ____

a. medication and behavioral training b. building emotional security c. reducing maladaptive thinking d. increasing self-efficacy