To investigate the effects of birth order, parents' education, and parents' occupation on four dimensions of the Junior Eysenck Personality Questionnaire, 262 elementary school students (100 boys and 162 girls) were selected randomly from four elementary schools in Shiraz. Analyses showed the main effects of birth order were significant on Neuroticism and Lie scales. Further, the effects of mothers' occupation on the Lie scale and fathers' education on the Neuroticism scale were significant.
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