Differences between Welsh and Canadian children on parts of the test of motor impairment.

Four subtests, which measured hand function, were taken from the Test of Motor Impairment and given to 53 10-year-old children of normal intelligence. The results showed a wide variation in achievement with one test at a very inappropriate level of difficulty. Girls were consistently faster than boys, achieving a result which was statistically significant in one instance. It is suggested that this test requires restandardization for use among British populations. The provision of separate norms for the sexes would improve the disciminatory value of this instrument.