Dabbs and Leventhal Point to Several Factors That They Did

Dabbs and Leventhal point to several factors that they did not systematically control, which could have affected their results. Among these factors are:

A) the order of presentation of the manipulations of fear, effectiveness, and pain.
B) the subjects' direct experience with medical practices and techniques.
C) the subjects' academic field of study-science and pre-med students may have been more knowledgeable about inoculation procedures than students majoring in the humanities or social sciences.
D) the effects of not giving all subjects in the experiment specific instructions on how to get a tetanus shot.