​Dr. Sweedey is conducting research that examines 5 year olds and their aggressive behaviors. She follows up with these same participants 10 years later to measure their reactivity to stress. She is using a ___________ design.

A) ​cross-sectional
B) ​experimental
C) ​longitudinal
D) ​ex post facto

Longitudinal Design

A research strategy that involves repeated observations of the same variables (e.g., people) over short or long periods of time.

Aggressive Behaviors

Actions intended to cause harm or discomfort to another, often as a response to perceived threats or frustrations.

Reactivity To Stress

The manner in which individuals respond or adapt to stress, highlighting the differences in coping mechanisms and physiological changes.