The Dimension Overlap (DO) model accounts for stimulus-stimulus (S-S) and stimulus-response (S-R) compatibility effects by perceptual, conceptual or structural similarity/conflict between the relevant stimulus dimension, the irrelevant stimulus dimension, and the response dimension of the task (Kornblum et al., 1990; Kornblum, 1992; Kornblum and Stevens, 2002). Here, a geometric representation is given to illuminate the pattern of performance for different stimulus-response configurations of all eight types of stimulus-response ensembles arising under this compatibility "taxonomy". This structural analysis provides qualitative prediction of relative ordering of RTs.
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