Eye movement patterns during a scanning cask were compared for Ss with over 100 hr. practice in tachistoscopic experiments and Ss with no such practice. The task consisted of scanning numeric matrices to determine the frequency of appearance (0–7) of a predesignated digit. The tachistoscopically practiced group scanned more quickly and made significantly fewer fixations per matrix, but made significantly more errors. Both groups showed significant variation in scan time as a function of the particular digit scanned for and as a function of frequency of appearance of the digit being scanned for.
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