MRC LHA & NSHD > Data collection

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Data Collection

Since the Maternity Survey, the NSHD study members have been followed up 24 times. The data has been collected through a combination of paper questionnaires and visits by health visitors or nurses in the home or in a clinic. Until 1965 a combination of the mothers, teachers, school nurses and doctors completed the questionnaires, while the study members completed tests of cognitive ability. Since 1965 the study members have completed their own questionnaires and nurses have conducted tests and examinations in study members' homes or in clinics.