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.