A Researcher Performs a Cross-Sectional Study Comparing the Video-Game Playing

Multiple Choice

A researcher performs a cross-sectional study comparing the video-game playing ability of 20-year-olds to 60-year-olds.The results indicate that the 20-year-olds learned to play a new game much faster than the 60-year-olds.However,the researchers are uncertain whether this indicates that the 20-year-olds' ability will decrease over time,or whether the 60-year-olds had more difficulty because they grew up before there were video games.What issue is this an example of?

A) cohort effects
B) attrition
C) sampling bias
D) scaffolding effects