In an experimental study of the effects of exercise on stress, subjects are randomly assigned to either the no exercise group or the exercise group. These groups represent the _____ and the _____, respectively

________ means that there is a relationship between two or more variables.

A. cause-and-effect B. correlation C. reliability D. validity

Of the seven conflicts Erikson believed adolescents must resolved in order to achieve identity, which did he refer to as the "search for fidelity"?

A) Leadership and followership vs. authority confusion B) Ideological commitment vs. confusion of values C) Role experimentation vs. role fixation D) Apprenticeship vs. work paralysis