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
Answer: A
Rationale: One major issue to consider in cross-sectional designs is the potential for cohort effects, which are consequences of being born in a particular year or narrow range of years. In this example, the 60-year-old age cohort did not play video games when they were children, which might explain the difference between themselves and the 20-year-old age cohort.
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