Participants were presented with this screen to allow them to practise the symbol digit test before the live timed segment began.

This resource be downloaded or viewed using the link: hm_symdig_pract.png

If you have wget available (typically on linux systems), then you can also obtain a copy using the command

 wget  -nd  biobank.ctsu.ox.ac.uk/ukb/ukb/images/hm_symdig_pract.png