Composition of the CoPS suite of subtests

The composition of the final suite of subtests in CoPS is shown in Table 5. To the eight subtests giving the most useful prediction of later literacy difficulties and dyslexia, a ninth supplementary subtest (Clown) was added, in order to assess colour discrimination. The purpose of this was to determine cases where students may score low on either or both of the two visual memory tests Crayons and Toybox, which depend on the student having competent colour discrimination (although not necessarily the ability to name colours). In such cases, if the student experiences colour discrimination difficulties then these, rather than memory limitations, could result in low scores.


Table 5. The nine subtests in CoPS