To discover whether visual serial search time for numbers differed significantly from time for letters, a repeated-measurements design was used with 24 undergraduate women. Performance on number targets 0 to 9 was significantly moe rapid than performance on the letter targets A to J, I to R, or Q to Z. By controlling confounding effects due to redundancy, the possibility that the outcomes might be related to the balance of linear and curvilinear target features was strengthened.
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