==== 1954 (aged 8 years) ====
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=== Responding Population ===

The mothers of all eligible study members were contacted: 4,435 mothers of cohort members were interviewed by the health visitor or school nurse.

|Provided information         |4,435|                        | | | | | |
|Cumulative total of deaths   |236  |                        | | | | | |
|Cumulative permanent refusals|1    |                        | | | | | |
|Temporarily living abroad    |40   |                        | | | | | |
|Cumulative emigrated         |259  |                        | | | | | |
|Failure to contact           |391  |                        | | | | | |
|
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=== Data collection ===

School nurses and health visitors interviewed mothers at home about the child’s health and development, school absences, play, the mother’s work, and the home and family circumstances. Teachers administered cognitive tests at school.
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=== Training for data collection ===

Instructions are given at the head of each form.
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=== Contents ===

=== Mother ===

  * Accidents
  * Infectious diseases
  * Admissions to Hospital
  * School clinic and out patient department attendances
  * School Absences
  * Bed Wetting
  * General health and behaviour
  * Schooling
  * Play and hobbies
  * The dwelling
  * The household
  * The mother’s work
  * Subsequent pregnancies
  * Family history

=== Mental ability and scholastic attainment ===

  * Sentence reading test
  * Infectious diseasesMechanical reading and workd comprehension test
  * Picture intelligence test
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=== Questionnaires ===

  * {{ questionnaires : 1954_mother_A4a.pdf|Form A4a }} – Interview of mother by nurse
  * {{ questionnaires : 1954_SM_NF2.pdf|Form NF2 }} - Mental ability and scholastic attainment completed by study member (under teacher supervision)
  * {{ questionnaires : School-Absences-195455-S3.pdf|Form S3 }} – School absence record (1954 – 1955)