This image is a montage containing reduced size copies of the 3 images (indexed 1-3) used in the practise stage prior to the matrix pattern recognition test. The thumbnails are 20% of the original bitmap pixel resolution.

This resource can be downloaded or viewed using the link: matimg_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/matimg_pract.png