What occurs when baseline measures change in the same direction as during an intervention phase, although the intervention has not yet been implemented with that dependent variable?
A)covariance
B)replication
C)verification
D)prediction

Question

Quizplus · Accepted Answer

This is an example of a potential threat to internal validity known as the "history effect," where an external factor other than the intervention may be influencing the outcome. The covariance between the baseline measures and the intervention phase could be due to this history effect rather than the actual intervention.

What Occurs When Baseline Measures Change in the Same Direction