Selah Is Aware That Playing Certain Types of Computer Games

Multiple Choice

Selah is aware that playing certain types of computer games can have an impact on mood,and she wonders whether these effects might vary with age.She recruits a group of college-age adults,a group of middle-aged adults,and a group of elderly adults to test her hypothesis.Selah's research is best described as ____.

A) longitudinal
B) cross-sectional
C) repeated measures
D) time series