A researcher for Major League Baseball is interested in visual accuracy of the players.The indicators of visual accuracy are batting average (high vs.low) and a computer "flicker" program that indicates changes in either the central or the noncentral region of a scene.The dependent variable is the time it takes to notice a change during flickers.When the researcher looks at a table of means, the data show that central flicker and high batting average = 40; noncentral flicker and high batting average = 20; central flicker and low batting average = 20; and noncentral flicker and low batting average = 40.Assuming a very powerful statistical test, the researcher should find:
A) a main effect for "flicker" type.
B) a main effect for batting average.
C) no main effects and no interaction.
D) no main effects but a significant interaction.

Question

Quizplus · Accepted Answer

The means for each group suggest that there may be an interaction between flicker type and batting average. Specifically, high batting average players seem to perform better on tasks involving central flicker, while low batting average players perform better on tasks involving noncentral flicker. Since there are no significant main effects for either factor, but there is a significant interaction, the answer is D.

A Researcher for Major League Baseball Is Interested in Visual