Conducted a yes-no reaction time task in which 7 male and 4 female undergraduates decided whether words described the same number as digits. The digits appeared either normally or after 180. rotation around their X, Y, or Z axis, and were read either from left to right or from right to left. Ss were fastest in reading digits rotated around their Z axis. It is argued that these flat stimuli may be processed as 2 or 3 dimensional objects in depth. Spatially transformed digits shown to the left of Ss' point of fixation, and read from right to left, were recognized faster than when shown to the right of fixation, and read from left to right; the reverse was found for normally oriented digits. (PsycINFO Database Record (c) 2006 APA, all rights reserved)