1. Results of Poor Design Inaccurate assessment of the prevalence of homosexuality based on human sexuality research by Kinsey, et al.

2. Complete Details in Kinsey, Sex, and Fraud by Reisman and Eichel

3. In 1988, health officials in New York reduced the estimated number of male homosexuals in New York City from 500,000 to 100,000. The larger number consistently led to large overestimates of the number of HIV-infected males in the city.

4. Where did the erroneous number of 500,000 come from? It was based on erroneous estimates of the frequency of homosexuality from the original 1948 Kinsey report on male sexual behavior.

5. Kinsey’s estimates for white males: 10% are homosexual for 3 or more years between ages 16 and 55 4% are exclusively homosexual throughout life (post adolescence) Better estimates 2% and less than 1%.

6. How did the Kinsey research arrive at estimates that were 5 times too high? - Volunteer bias - Disproportionate sampling from some groups (strata) with high rates - Inappropriate analytical methods - Misleading definitions - Possibly, intentional fraud due to personal bias.

7. Volunteer Bias Certain personality types are more likely to volunteer than others People with strong opinions are more likely to take surveys than those who are indifferent Those who “agree” with the views of a survey’s designer are more likely to take part than are those who “disagree”

8. Disproportionate Sampling Kinsey seems to have sought out the unconventional 20% to 25% of the sample had “prison experience” and 44% of these had homosexual contacts while in prison may have sought out “sex offenders” 5% or more of his sample may have been male prostitutes

9. Disproportionate Sampling Goal : not to estimate frequency of unconventional behavior, but to document the existence of unconventional behavior Sometimes asked “interesting” people if they knew of others that the team should interview

10. Is Fraud a Serious Possibility? Problems with Kinsey’s methods were reported to him by eminent statisticians through peer review processes Kinsey persisted in reporting biased rates of homosexuality based on seriously flawed methods

11. Social Consequences So what? Why would inaccurate data be a problem? Did overestimates of the AIDS epidemic do any real damage? Some sex education programs in schools actively promoted the false 10% number (e.g., Project 10 - L.A. Unified School District)

12. A Basic Question Should people seek truth, or should they seek results that please them? Should public policy be based on solid science? If not, who gets to decide?