Pre-post designs are threatened by ____.
A) factors related to the passage of time
B) factors related to differences between groups
C) individual differences
D) differential attrition

Question

Quizplus · Accepted Answer

Pre-post designs are threatened by factors related to the passage of time, such as maturation, history, and regression to the mean. These threats can make it difficult to determine whether changes observed in a group are due to the intervention or other factors. Factors related to differences between groups, individual differences, and differential attrition are threats to other types of study designs, such as randomized controlled trials and cohort studies.

Pre-Post Designs Are Threatened by ____