<Li> An experiment by Stanley Milgram raised questions about the ethics of scientific experimentation because of the extreme emotional stress suffered by the participants . It measured the willingness of study participants to obey an authority figure who instructed them to perform acts that conflicted with their personal conscience . </Li> <Li> Comparative psychologist Harry Harlow drew moral condemnation for isolation experiments on rhesus macaque monkeys at the University of Wisconsin--Madison in the 1970s . The aim of the research was to produce an animal model of clinical depression . Harlow also devised what he called a "rape rack", to which the female isolates were tied in normal monkey mating posture . In 1974, American literary critic Wayne C. Booth wrote that, "Harry Harlow and his colleagues go on torturing their nonhuman primates decade after decade, invariably proving what we all knew in advance--that social creatures can be destroyed by destroying their social ties ." He writes that Harlow made no mention of the criticism of the morality of his work . </Li>

Who asserted that psychology is directly concerned with human behaviour