UK Data Service variable record for:
| Variable | BCSID | 
| Label | research case identifier | 
| Disclaimer | Please note that these frequencies are not weighted. | 
| Location | 1970 British Cohort Study: Sixteen Year Follow-up, Reading and Matrices Tests, 1986 | 
| Universe | The instrument was sent out to every school in Great Britain at which anyone born in April 1970 was likely to be attending.;National | 
| Sampling | No sampling (total universe) | 
| Study Type | Longitudinal/panel/cohort; Cross-sectional element of the BCS70 longitudinal study |