Research some of the ethical issues which have occurred in previous studies in Psychology, such as the Stanford Prison Experiment.

The study has received many ethical criticisms, including lack of fully informed consent by participants as Zimbardo himself did not know what would happen in the experiment (it was unpredictable). Also, the prisoners did not consent to being 'arrested' at home.

Explanation:

answer; (true);

the answer to your question is,

old stone age.

-mabel < 3