For an experimental group in a program to reduce anxiety, the mean pretest score is 80 (max = 100). The posttest score is 70. This change was the result of
A)regression
B)program effectiveness
C)maturation
D)any of the above are possible

Question

Quizplus · Accepted Answer

The change in scores could be due to regression to the mean, the effectiveness of the program, or natural maturation over time. Without further information, any of these explanations are possible.

For an Experimental Group in a Program to Reduce Anxiety