Introduction -- The Jim twins (February-March 1979) -- 15,000 questions x 137 pairs -- Early findings (1979-1983) -- Sexual orientation, cognition, and medical traits (1984-1987) -- Pivotal papers: personality and IQ (1988 and 1990) -- Job satisfaction, cardiac characteristics, and more (1989-1990) -- Psychopathology and religiosity (1990) -- Dental traits, allergies, and vocational interests (1991-1992) -- Creativity, work values, and evolution (1992-1993) -- Family environments, happiness, sensation seeking, and the MMPI (1994-1997) -- "Larks" and "owls," ego development, and authoritarianism (1998-2002) -- Twin relationships, social attitudes, and mental abilities (2003-2005) -- Sexual development, fluctuating asymmetry, body size, and the structure of intelligence (2006 and beyond) -- Questions, answers, and twin studies of the future.
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.