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We moved them to The National Archives website, to keep this website as responsive as possible.
Please note: all historical data is still on this website.
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Metrics used to give an indication of data quality between our test’s groups. This includes whether documentation was used and what proportion of respondents rounded their answers. Unit and item non-response are also reported.
Operational factors such as length of time taken to complete survey and how data were entered, by treatment group.
Comparison of proxy levels (where an individual completes the survey, but their responses are provided by another household member) and recontact permission rates, by treatment group.
Breakoff as a percentage of those who entered the section for household and individual level questions.
The proportion of selected households that engaged with the survey (by logging into it) and responded to the survey (by completing it), by treatment group.
Comparison of basic demographic information achieved by the survey against other similar sources.
