Published online by Cambridge University Press: 31 July 2008
Questionnaire data were obtained from the homes of 467 boys and girls in special education classes for educable mentally retarded children and minimally brain injured children which allowed six social class factors to be assessed. For four variables the scores for the two disability groups were significantly different, indicating for the minimally brain injured children a more favourable parental occupation, parental education, and social position, and indicating for the educable mentally retarded children a larger number of children in the family. No differences were apparent between the groups when considering the birth order or the month of birth of the children in the project. The influence of sex as an independent variable was not significant in this research.