Games like "Peek-a-Boo" and "Hide-and-Seek" are especially worthwhile activities for babies because they help them develop a sense of ______

Color blindness and color afterimages are best explained by what theory of color vision?

A) trichromatic theory B) visible hue theory C) Opponent-process theory D) dichromatic theory E) binocular disparity theory

The College Board's Validity Study Service reported a correlation of +.42 between college grade-point average and SAT scores. Which statement is most consistent with this report?

a) SAT scores cause grade-point averages to rise. b) The relation means SAT scores can be used to predict grade-point average. c) There is little relation between SAT scores and grade-point average for most college students. d) The relation is not based on sound scientific principles of investigation and should not influence admissions decisions.