In the Alameda study on health and aging, only ________ and ________ were found to be unrelated to mortality

A researcher who selects a sample of people of varying ages and studies them at one point in time is, by definition, using the ______ method

a. longitudinal c. cross-sectional b. correlational d. biographical study

Based on the opponent-process theory of color vision, you could predict that if an individual stared at a picture of the American flag then shifted his or her eyes to a white surface, the afterimage of the flag would appear to be:

a. red, white, and blue b. green, white, and blue c. green, black, and yellow d. completely yellow