Question

Dr. Dawson is conducting a study with military veterans from the Vietnam and Gulf wars. He plans to evaluate them every year for 10 years to see if those with PTSD have a more pronounced decline in mental abilities and overall memory. This is a(n) ________ study.

a) longitudinal
b) experimental
c) cross-sectional
d) chronological

Answer 1

a) longitudinal

Step-by-step explanation:

• Studies can be observational (when no intervention happens) or experimental (when a variable is manipulated, an experiment is conducted).
• Observational studies, based on time, are classified as longitudinal or cross-sectional.

1. Longitudinal studies follow the same group of people during a determined period of time.
2. Cross-sectional studies are defined as "snap shots", they compare different groups of people at one specific moment of time.