The main factor responsible for obtained cross-sectional differences in IQ has been shown to be
A) adult age
B) cohort
C) time of measurement
D) all are equally responsible

Question

Quizplus · Accepted Answer

Cross-sectional differences in IQ are mainly due to cohort effects, which refer to the fact that individuals who grew up and were educated in different time periods will have been exposed to different environments, education systems, and cultural values that can influence their cognitive development and test performance. Age and time of measurement may also contribute to some extent, but they are not the primary factors responsible for cross-sectional differences in IQ.

The Main Factor Responsible for Obtained Cross-Sectional Differences in IQ