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

This resource can 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.ndph.ox.ac.uk/ukb/ukb/images/hm_symdig_pract.png