BCS70 Age 34 survey (2004-05)

The BCS70 age 34 survey took place between February 2004 and June 2005.


9,665 cohort members took part in total.


A 50 minute interview comprising a CAPI (Computer-Assisted Personal Interview) and a CASI questionnaire (Computer-Assisted Self Interview).  In addition to the core interview the Age 34 interview also involved:

  • A 40 minute assessment of adult basic skills
  • An additional Parent and Child CAPI module for cohort members with natural or adopted children aged 16 or under in the household. 
  • A ‘Parent’ paper self-completion questionnaire which was completed for each eligible child
  • Child assessments
  • Child self-completion questionnaires

More information about the coverage of each element of the survey and the downloadable questionnaires are provided here. A full description of the design of the age 34 survey is provided here. 


The data are available from the UK Data Service. Guidance on how to use the data is provided here.


Fieldwork was funded by the Economic and Social Research Council (ESRC).

Fast facts:

  • Survey age: Age 34
  • Survey year: February 2004 and June 2005
  • Response: 9,665
  • UK Data Service reference code: 5585
  • PI: Jane Elliott, IOE
  • Fieldwork agency: NatCen
  • Funder: ESRC