In a certain study,different interviewers are used in a pretest from those used in the posttest and this produces different results in the study.This is an example of a(n)____.
A)history effect
B)mortality effect
C)instrumentation effect
D)cohort effect

Question

Quizplus · Accepted Answer

The use of different interviewers in the pretest and the posttest can lead to an instrumentation effect, where the measuring instrument changes between the two tests, leading to different results. This is a type of measurement error that can affect the validity of the study. History effect refers to external events that can influence the outcome of the study, mortality effect refers to participants dropping out of the study, and cohort effect refers to differences due to the age, generational, or other differences between groups being studied. None of these options fit the scenario described in the question.

In a Certain Study,different Interviewers Are Used in a Pretest