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 five minutes and the other half to play for seven 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?

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

are there actual statements because if not my answer would be: that using the five senses the author can create a sense of worth in an object to appeal to the reader and create meaning.

no questions on whether they are allowed that right