Adam is part of a group organized to increase blood donations in a local community. as a social psychologist, adam has a relevant background in persuasion tactics, but his group members fail to realize the important contributions he could make. this scenario is an example of

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.        

answer; in small towns;