Although Külpe (14) used only three subjects in his original experiment on tachistoscopic memory in 1904 his classification of them into colour, form and intermediate types has initiated a substantial amount of psychological research all over the world. Thus investigations into both normal and abnormal personality correlates of reaction to colour and form have been carried out in France (8), Poland (1), Italy (5), (18), Japan (17), Britain (6), (9), (16), America (4), (23), Sweden (2), (15), and Germany (20), (21) to quote but a representative sample.