Research shows that corporal punishment is a(an) ___________ form of discipline in the U.S

Dr. Leung's research in gerontology is focused on plasticity. He works with people who have experienced some decline in cognitive ability and measures how well they can learn and apply new adaptive methods. Which core issue of human development does Dr. Leung's research explore?

a. continuity-discontinuity controversy b. stability-change issue c. nature-nurture issue d. universal versus context-specific controversy

Pessimism and other symptoms of depression can set the

stage for negative life events, but at the same time negative life events can also lead to pessimism and other symptoms of depression. The uncertainty of the direction by which these relationships exist indicates the importance of remembering the principle of A) extraordinary claims. B) replicability. C) correlation versus causation. D) Occam's Razor.