Clown is a test of colour discrimination. A student who is having difficulties on Clown will probably have colour discrimination problems (but not necessarily so – see below), and may be colour blind. The student can be referred via the GP for full assessment for colour blindness.
The main function of Clown is to rule out colour discrimination difficulties in cases of students with a low performance on Toybox and Crayons. Hence, when students do score low on those subtests, if Clown has not already been administered to the student, then it should always be given as a precaution, before attempting to interpret the results of Toybox and Crayons. Clown need not be given if the teacher is confident that the student’s colour discrimination is satisfactory. On the other hand, many teachers find Clown is a good introduction to the suite of subtests because most students find it very easy but enjoyable nonetheless.
The colour discriminations tested in Clown are:
- Light Blue
- Dark blue
These are the colours used in Toybox and Crayons. Of these colours, the most likely confusion in a student who is colour blind will be when trying to distinguish red and green. About 7.5% of males and less than 1% of females are colour blind, which reflects a sex-linked recessive inheritance.