Wendy wants to study how easily people make friends. She assigns people to talk with a stranger for either five minutes or ten minutes, and assigns people who are more outgoing to the "five-minute" condition, and shy people to the "ten-minute" condition. Which of the following is the threat to the internal validity in this study?

Question

Quizplus · Accepted Answer

Wendy did not use random assignment, which can lead to confounding variables and affect the internal validity of the study. Assigning outgoing people to one condition and shy people to another could also introduce a confounding variable, but this does not appear to be a listed option. The other options (A-C) do not accurately describe the threat to internal validity in this study.

Wendy Wants to Study How Easily People Make Friends