nature vs nurture The concept of nature vs nurture is one of the cornerstones of psychological theory and research in fact, some human development textbooks use nature-nurture.
{"Image DocumentName": "Nature vs. Nurture Debate", "Image ImageDescription": "Are people born gay or do they become gay? Homosexuality was considered a mental illness by the American Psychological Association until 1973 when it was removed from the DSM; public statement made in Medical Studies: Pillard & Bailey. Northwestern University; early 1990s >> largely biologically determined. Examined identical & fraternal twin brothers & non-related, adopted brothers. If one identical twin was gay, 52% of the time so was his twin. 22% for fraternal twins. 5% for adopted brothers. Findings have since been debated. Also identified a familial link. No gay gene has been found, but studies have proven some links in families with multiple gay sons. More biological older brothers >> more likelihood of being gay.   DSM = Diagnostic & Statistic Manual of Psychology. Pillard himself is gay & so are many members of his family. Gay Gene XQ28 chromosome \u2013 also headlines about alcoholism gene, warrior gene, etc. Genes cannot always control behavior though. This genetic marker is just very likely in families with two homosexual brothers.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}