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Series

Survey

Country

Date

Data collector

Question: Harmonised set

Question: Intent

Variable and question bank

The UK Data Service will be closed from 17.00 on Tuesday 23 December 2025. All services will fully resume on Monday 5 January 2026. Online services will run unattended during this period. Season’s Greetings to all our users.

Search and browse variables and questions from survey datasets.

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SQB result

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View all instances of this variable Q13 : Whether colour blind
Question Text: Are you colour blind? SELECT ONE ANSWER ONLY
National Child Development Study: Understanding Individual Behaviour, 2010
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SQB result

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View all instances of this variable Q13 : Are you still in contact with your twin? If so how frequent is this contact?
Question Text: Are you still in contact with your twin? If so how frequent is this contact?
Study of Twins in the National Child Development Study and the 1970 British Cohort Study, 2008
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SQB result

Add to My Variables

View all instances of this variable Q13 : Are you still in contact with your twin? If so how frequent is this contact?
Question Text: Are you still in contact with your twin? If so how frequent is this contact?
Study of Twins in the National Child Development Study and the 1970 British Cohort Study, 2008
View responses...

Displaying 1-3 of 3 results
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We are supported by the University of Essex, University of Manchester, Jisc, UCL and University of Edinburgh. We are funded by UKRI through the Economic and Social Research Council.