As the Twig Is Bent? The Myth of Child‐Rearing Influences on Personality Development

Social scientists and laypersons alike believe that child‐rearing styles and family environments are formative of personality traits such as shyness and activity level, intellectual traits such as IQ, and psychopathology. After 100 years of behavioral genetic research, however, including new studies of twins raised apart and together, little factual support for this “common sense” proposition can be found. Nonintellectual traits seem to be determined instead by genetic influences and by relatively specific environmental influences, most of which are not particularly tied to the family or parental treatments. Intellectual traits show modest family environmental influence, but that influence may diminish in importance after childhood. I conclude that parents should be given less credit for children who turn out well and should take less blame for children who turn out poorly. Counselors who blame parents less for children's behavioral outcomes—especially extreme traits and psychopathology—may find those parents to be more willing helpers in those intervention processes that have been shown to work.