A researcher conducting a cross-

Question

Quizplus · Accepted Answer

Including a middle-aged group would help to reduce the age span being compared, which can help control for age-related variables. This would increase the precision of the study and improve the reliability of the statistical inferences that can be drawn from the data. Limiting the young adult group to college students would introduce a bias, as not all young adults are college students. Examining the older adults in a computer lab may not be necessary or relevant to the research question, and paying the college students but not the older adults for participating may introduce a confounding variable related to motivation or expectations.

A Researcher Conducting a Cross-