Abstract: Test for assessing a test subject's sensory-motor abilities consisting of presenting to the test subject a number of symbols (4) on a screen (5) and requiring the test subject to identify one or more preselected characteristics of the symbols; the tests are repeated many times with a varying arrangement of symbols and the results are recorded; in addition, the test may require the test subject to simultaneously carry out a random tracking test in which the test subject is required to steer a controllable second symbol (7) along a varying route (6) using manual controls simultaneously with identifying a preselected characteristic of the first symbols (4).