Born together--reared apart: the landmark Minnesota twin study

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.