Corrine has mastered this type of problem: if the white house is bigger than the blue house, and the blue house is bigger than the red house, is the white house bigger or smaller than the red house? what stage of piagets cognitive theory does this situation best illustrate

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.        

aren't cheetos good enough to be president?