The mothers of all eligible study members were contacted. In addition the school doctor completed an assessment and the schools were asked to provide various details. The study members were also given a self-completion questionnaire and some tests.

School nurses and health visitors interviewed mothers at home; this was the final interview with the mothers. Teachers completed a postal questionnaire about the study member and administered the cognitive tests. Headteachers completed the postal questionnaire about the school and school doctors carried out the medical examination. Hospitals to which study member children had been admitted were asked to complete a postal questionnaire about health, length of admission, visiting arrangements, diagnosis, treatment and discharge.

Instructions are given at the head of each form.

• Accidents and Illnesses
• Schooling and employment of child
• Parental health
• Parental employment
• Further pregnancies
• The home and family

• Employment ambitions
• Social activities
• Alice Heim (AH4) test
• Watts-Vernon reading test
• Mathematics test
• Occupation preferences

• Class details
• Punctuality and truancy
• attitude to school work
• School leaving plans
• Behaviour
• Habits

• Medical history
• Examination

More detailed information on the topics collected is available here

• School details
• Buildings and Amenities
• Pupil backgrounds

• Form A7 – Interview by nurse
• Form D4 - Examination by Doctor
• Form S8a – Teacher’s Questionnaire
• Form S8b – Headteacher’s Questionnaire
• Form NF4 – Pupils Questionnaire