Visual information processing of sequentially presented inputs: II. Effects of list length and interstimulus interval values on subspan storage and retrieval mechanisms

A computer-based, cathode-ray tube display system was employed to study the effect of subspan list length, i.e., 2-, 3-, 4-, 5-, 6-, or 7-decimaldigits, at several interstimulus-interval (ISI) values, i.e., 60, 100, 140, 180, 220, 260, and 300 msec, on visual-information processing, storage, and retrieval mechanisms. Complicated interactions, found in an earlier study employing word strings, were found again in the present study between list length and ISI values, and two fundamental questions raised by these interactions still requiring answers were outlined.