What is it called when people change their behavior because they are being observed?

Dating during adolescence is

A) a natural response to biological changes. B) a universal mechanism for promoting mate choice. C) a cultural custom in North America and some other places. D) a practice that goes back to the Middle Ages and earlier.

Fifty years ago, medical research with human subjects

a) was generally more ethical than mental health research. b) was monitored by review boards in the institutions where the research was being conducted. c) was used as a way of punishing mentally ill prisoners. d) frequently led to serious, harmful consequences to participants.