Cindi was one of a number of children in her third-grade class who wore glasses. Cindi was nearsighted. When variations in growth of the eye cause the lens to focus images in front of the retina, instead of exactly on the retina, this is called ________

To study change over time, researchers use which three basic research designs?

observation, experiments, survey cross-sectional, longitudinal, cross-sequential biological, social, cognitive significance, odds ratio, factor analysis

A Canadian study found that ___ of adolescents reported arguments between parents and teens at least once a week

a. 20% b. 30% c. 40% d. 50%