—Dr Schneider's critique of the Serial Sevens Test is well taken. As he points out, there is considerable question as to what the test actually measures. Hayman's original control group was composed of children, and he demonstrated a correlation between the errors they made on the Serial Sevens Test and their grade in school.1 It would thus seem reasonable to conclude that the Serial Sevens Test measures arithmetic learning and performance. I agree that, because of its variable application and the incorrect and inappropriate interpretations made from it, we should probably eliminate the Serial Sevens Test from the standard mental examination. As has been said previously, if something is not worth doing, it is not worth doing well.