Individual differences in the ordered recall of list of digits are examined experimentally. The resulting evidence argues that neither differences in rehearsal strategies nor differences in the tendency to group and chunk the digits are major determinants of differences in digit span size. Further experiments attempt to pinpoint the source of…

One of the basic problems in relating learning theories to instructional strategies is that traditionally learning theory has researched the micro unit whereas the instructional environment studies the macro unit. Traditionally, instructional strategy research and development takes the learner as he comes, an integrated organism. In learning…

The work of a three-year series of experimental studies of human cognition is summarized in this report. Proglem solving and learning in man-machine interaction was investigated, as well as relevant variables and processes. The work included four separate projects: (1) computer-aided problem solving, (2) computer-aided instruction techniques, (3)…