This experiment demonstrates serial processing of tachistoscopic patterns when all potential artifacts are eliminated. Two nonsense arrays of six letters were tachistoscopically exposed successively at the same positions. Ss identified more letters from the temporally first string on the left of fixation and more from the second on the right, indicating left-to-right serial processing. Variations among Ss in the location of the crossover in curves indicate individual differences in processing time. Therefore, this study demonstrates definitively that tachistoscopic performance at various positions can reflect a sequential left-to-right processing of information, possibly at different rates.
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