Various studies have found that ¬¬¬¬____ of American emerging adults report having sex outside of a romantic partnership

An accumulation of problems that make a person vulnerable to serious disease is

allostatic load weathering life expectancy mortality

The main reason that psychological researchers use the experimental method is to

a. make claims concerning causality. b. eliminate operational definitions. c. suggest possible confounding variables. d. determine whether two variables are related.