Author Question: When there is a significant time lapse between pretest and posttest measures, the confounding ... (Read 106 times)

serike · **on:** Aug 4, 2018

When there is a significant time lapse between pretest and posttest measures, the confounding variable most likely to affect results would be

A) history.
B) regression to the mean.
C) instrumentation.
D) selection.

Question 2

Threats to internal validity due to ________ are greatest when a long time has passed between pretest and posttest measurements.

A) regression to the mean
B) history
C) effects of testing
D) scoring errors

Fill in the blank with the correct answer.