A graph of a two-factor study indicates an interaction when the lines on the graph
A)are parallel.
B)cross or converge.
C)are steep in slope.
D)none of the other three choices demonstrate an interaction.

Question

Quizplus · Accepted Answer

When the lines on the graph cross or converge, it indicates that the effect of one factor on the dependent variable depends on the level of the other factor, which is the definition of an interaction. Therefore, option B is the correct answer. Option A (parallel lines) indicates no interaction, option C (steep lines) may indicate a main effect but not necessarily an interaction, and option D is not correct because option B demonstrates an interaction.

A Graph of a Two-Factor Study Indicates an Interaction When