According to rosenthal and rosnow, when compared to nonvolunteers, volunteers tend to be: highly educated. of a lower socioeconomic status. less in need of approval. more unsociable.

I believe the correct answer is: highly educated.

     According to the research “The volunteer subject revisited” by Ralph L. Rosnow and Robert Rosenthal, when compared to non-volunteers, volunteers tend to be highly educated. Alongside higher education, volunteers also tend to come from a higher social class and be more social.

- "ethical issues. deception – the participants actually believed they were shocking a real person and were unaware the learner was a confederate of milgram's. however, milgram argued that “illusion is used when necessary in order to set the stage for the revelation of certain difficult-to-get-at-truths.” "

- "milgram's work was conducted in the early 1960s before the current.the studies ignited a debate about the ethical treatment of participants. what appear to be dangerous, if not deadly, electric shocks and the by today's ethical standards, many questions about the research have gone unanswered."

answer; the basal forebrain;