A researcher discovers that extroverts solve problems better than introverts when in a large room, but that introverts do better than extroverts in a small room. Which of the following is true?
A) this outcome describes a main effect for room size
B) this outcome describes a main effect for personality type
C) this outcome describes a person by environment (P x E) interaction
D) in this study, there were two main effects (room size and personality type) but no interaction

Question

Quizplus · Accepted Answer

The outcome describes a person by environment (P x E) interaction, as the effect of personality type on problem-solving depends on the environment (room size). There is no main effect for personality type or room size individually, as extroverts are not always better problem-solvers and larger rooms do not always lead to better performance. Additionally, there is no evidence of two main effects and no interaction, as there is a clear interaction effect observed.

A Researcher Discovers That Extroverts Solve Problems Better Than Introverts