From a study in which college students were subjects in a computer dating experiment, the primary determinant of how much subjects initially liked their date was

answer; ///(c) i believe that the correct answer is ethnic relations bear many similarities across different global; good luck

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.