Garrick Wants to Understand How Soldiers Are Affected by Their

Multiple Choice

Garrick wants to understand how soldiers are affected by their time at war. To do this, he assesses military personal as they complete boot camp and then again after they complete their first tour of duty. Garrick has chosen to use which type of research design?

A) between-subjects
B) nonexperimental
C) cross-sectional
D) longitudinal