A Research Example A 2 X 2 factorial experiment with an interaction and one main effect is
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Question

Quizplus · Accepted Answer

A 2 X 2 factorial experiment with an interaction and one main effect means that the effect of one factor depends on the level of the other factor. Therefore, if we plot the means for each condition, we should observe two lines that are not parallel. Choice A and D both describe two parallel lines, which is not consistent with the presence of an interaction effect. Choice B describes two lines that are separated vertically, which is consistent with a main effect but not an interaction effect. Choice C describes two lines that increase from left to right and the upper line has a steeper slope than the lower line, which is indicative of an interaction effect. Therefore, choice C is the best answer.

A Research Example a 2 X 2 Factorial Experiment with an Interaction