Professor Higgins is concerned about the findings of a longitudinal study on childhood depression that she conducted between 1985 and 2015 in New York because many of the participants witnessed the terrorist attacks on the World Trade Center.Professor Higgins is concerned about __________ effects.
A) practice
B) cross-sectional
C) dropout
D) cohort

Question

Quizplus · Accepted Answer

The concern is related to the fact that the participants were all part of the same cohort and were exposed to a common event (9/11). This makes the answer choice D, cohort effects, the most relevant option. Practice effects refer to changes in performance due to repeated testing, cross-sectional effects refer to differences between groups at different ages, and dropout effects refer to differences between those who remain in a study and those who drop out. While these factors may have played a role in the study, they are not directly related to the specific concern raised by Professor Higgins.

Professor Higgins Is Concerned About the Findings of a Longitudinal