Dr.Morimoto is curious as to whether exposing people to violent video games causes them to be more aggressive.He assigns half his participants to play a video game for 5 minutes and the other half to play for 7 minutes.He finds that there is no relationship between playing the game longer and being more aggressive.What might be to blame for this null effect?
A) A weak manipulation
B) An insensitive measure
C) A reverse confound
D) Too much within-group variance
E) Ceiling effect

Question

Quizplus · Accepted Answer

A weak manipulation could be to blame for the null effect, as the difference in exposure time between the two conditions may not have been significant enough to elicit a measurable effect on aggression.

DrMorimoto Is Curious as to Whether Exposing People to Violent