Mehmet is conducting a study aimed at improving the problem solving abilities of older adults.Prior to the intervention,all of the participants are given a series of problems to solve and,in the process of trying to solve them,many of the participants refine their approaches to problem solving.As a result,Mehmet's study has a(n)____ threat.
A)history
B)maturation
C)instrumentation
D)testing

Question

Quizplus · Accepted Answer

The correct answer is D) testing, because the participants' problem-solving abilities may have improved simply due to the practice they received while attempting to solve the initial series of problems, rather than as a result of the intervention Mehmet is studying. This is known as a testing effect, where the pre-test influences the outcomes of the post-test.

Mehmet Is Conducting a Study Aimed at Improving the Problem