Current neuroscientific theories identify biological causes for sexual orientation. What early-twentieth century sex researcher agreed with this theory?

Richard von Krafft-Ebing's book Psychopathia Sexualis was based on

A man has developed a fetish for women's clothing. His therapist believes this is due to repressed memories of an event that occurred in his childhood. His therapist has been influenced by the ideas of

An early theory that sexual desires are focused in the unconscious mind, especially during childhood, was proposed by

The principle of informed consent includes all of the following, EXCEPT:

Masters and Johnson's results differ from surveys of sexual behavior because:

A sex researcher is interested in conducting a study on the sexual behavior of African-American individuals in polyamorous relationships and manages to contact 60 such individuals to participate in the study. In research terms, this group of participants is the researcher's:

A sex researcher is interested in understanding the trends in contraceptive use among sexually active 21 year-old females living in the United States and manages to obtain a sample of 70 such individuals. However, upon closer investigation, it was discovered that all the participants had one characteristic in common-they all had engaged in intercourse before the age of 15. Based on this we may conclude:

A researcher is studying the incidence of child sexual abuse in public schools, and she sends a questionnaire to 1,000 randomly selected students' homes. The questions ask how frequently parents currently abuse their children and how often they abused them in previous years. 500 questionnaires are returned. Which of the following are significant problems with this research study?

What type of research can best address the question "What causes physical sexual arousal?"