The most serious confounding that occurs in the longitudinal design is between:
A) age and treatment
B) age and generation
C) age and time of test
D) generation and time of test

Question

Quizplus · Accepted Answer

In longitudinal designs, the same individuals are tested over time, so age and time of test are confounded because changes could be due to aging or the specific time period when the test is conducted.

The Most Serious Confounding That Occurs in the Longitudinal Design