Bill conducted an experiment to determine the effectiveness of a drug prevention program in high school.This group was compared to students at another high school that did not take part in the program.The students were given an exam before and after taking part in the program.As the students completed the posttest,many realized that it was the same test they took before the program and put in random answers,as teenagers would.This is a case of what invalidity problem?
A)history
B)maturation
C)instrumentation
D)testing
E)mortality

Question

Quizplus · Accepted Answer

This is an example of the testing invalidity problem, where taking the pretest affects the results of the posttest. In this case, the students recognized the test and put in random answers, which would not accurately reflect their knowledge or understanding of the material.

Bill Conducted an Experiment to Determine the Effectiveness of a Drug