Hofling et al study in which nurses were to instructed over the phone by a doctor (the researcher) to give patients a does of a unfamiliar drug which was also a higher doses of what they should actually take. The findings of this where that 21 out of 22 nurses obeyed, supporting the proximity variation, decreased proximity allows people to psychologically distance themselves from the consequences of their actions, and because the doctor had more authority they just obeyed and did as they were instructed to do.