You are participating in a social psychological research exp…

You are participating in a social psychological research experiment and the researcher reads the instructions to you and the other participants so that all of you hear the same instructions. By standardizing the instructions, the researcher is attempting to control the:

Your psychology professor tells you that she is collecting d…

Your psychology professor tells you that she is collecting data on the amount that students study and their grades (i.e., she is asking each student to report how many hours he/she studies each week, so that she can determine if there is a relationship between hours spent studying and grades). Which type of research is this?