ABSTRACT
The sample used for the 'Both schools' survey, as its name implies, was composed of ex-pupils of secondary schools (excluding secondary modern) who had attended both a co-educational and a single-sex school. They were all students in colleges of education again scattered widely throughout England and Wales. A research questionnaire and paper and pencil tests of temperament were given in 1964 to pupils in co-educational and single-sex grammar schools in South Wales and the West Riding of Yorkshire. As some of the early results from the Schools project showed smaller differences between the opposing girls' groups than those found in earlier surveys a 'check' investigation was made amongst all girls in each school who were in the 11-plus age group and had not been included in the Schools project.
