Personality and Heredity: An Introduction to Psychogenetics

abnormalities accept achieve activity actual animals apparently argued argument associated basis become behaviour biological capacity cause chapter characteristics chromosomes circumstances common compared concerned concordance considerable correlations course cultural deal depend determined differences differentiation difficult disorder effects environment environmental equally evidence example exist expected experience experimental fact factors females findings follow functioning genes genetic given greater human ideas important individual influences inheritance intellectual intelligence interest involved issue learning least less limited male manic-depressive matter means measures mental nature nevertheless normal observations occur origin pairs parents particular perhaps personality physical possible present principles problems processes produce proved psychogenetics psychological qualities question range rates reason refer relation relationships relative schizophrenia scientific seems selected sexual significance similar simply social sort sources species studies suggest tend tests theories twins