A reply to a study by Mann and Boring (see 28: 315), which attempted to show that the different results obtained by Mann and Witkin are explicable on the grounds of differences in instructions. Witkin notes that the Mann-Boring study does not reproduce accurately the instructions used by him, and that neither individual differences in mode of space orientation nor the greater influence of the visual field can be explained in terms of instructions given the Ss. (PsycINFO Database Record (c) 2006 APA, all rights reserved)