Shyers (1992a, 1992b), in the most thorough study of home-schooled children’s social behavior to date, tested 70 children who had been entirely home-schooled and 70 children who had always attended traditional schools. The two groups were matched in age (all were 8-10 years old), race, gender, family size, socioeconomic status, and number and frequency of extracurricular activities. Shyers measured self-concept and assertiveness and found no significant differences between the two groups.
The observers used the Direct Observation Form of the Child Behavior Checklist . . . , a checklist of 97 problem behaviors such as argues, brags or boasts, doesn’t pay attention long, cries, disturbs other children, isolates self from others, shy or timimd, and shows off. The results were striking — the mean problem behavior score for children attending conventional schools was more than eight times higher than that of the home-schooled group.
via Joanne.