At the start of an experiment everyone is excited about their participation.Everyone takes a great deal of care in completing the pretest survey.The experiment takes five hours to complete.At the end of the experiment,a post-test questionnaire is administered.Many of the respondents just want to get home,and so give only superficial answers to the post-test questions.This situation reflects a ________ threat to internal validity.
A)maturation
B)selection
C)mortality
D)testing
E)researcher bias

Question

Quizplus · Accepted Answer

Maturation threats to internal validity occur when changes within the participants themselves (such as getting tired, bored, or less motivated over time) affect the outcome of the study, as described in the scenario.

At the Start of an Experiment Everyone Is Excited About