Ch11_ppt_-_Motivation_and_Emotion

Novapdfcom 11302009 fraternal birth order effect

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Unformatted text preview: terminants of Sexual Orientation Prenatal-sex-hormone activity & brain neural pattern hormone predispose preferences One theory Male fetuses with androgen insensitivity develop female anatomy; Raised as girls (Socialization processes processes influence orientation) Another theory Heredity Heredity affects orientation indirectly; Personality style ► Gender-conforming/nonconforming conforming/nonconforming Yet another theory activities ► Affects attraction 17 Create PDF files without this message by purchasing novaPDF printer (http://www.novapdf.com) 11/30/2009 Fraternal Birth Order Effect Greater Greater # older brothers (NOT sisters) ↑probability to have have homosexual orientation, Why? – Incestuous sexual encounter – If older brother is homosexual Not likely Raises awareness • Maternal immune hypothesis (biological): fetus has (biological): H-Y antigen guiding brain to male-typical pattern, typical but but sometimes goes to mom’s bloodstream Antibodies prevent fetal brain from developing ntibodies patte...
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