Abstract
Concerning the better display for the visual stimuli, one of the key parameters for the matching with the human short-term memory is the presentation time of the information. We have studied on the optimum-apportionment modes of the presentation time of sequentially presented seven capital alphabet characters on five young males by means of our time-continuous model of the short-term memory. These modes are thought to allow the easiest retention in the short-term memory. The average optimum-apportionment mode, as an average of individual scores of the optimum-apportionment mode, was also obtained. With free-recall experiments on the alphabet, four constants of the model were determined on the subjects, respectively. Then, the theoretical optimum-apportionment modes were calculated with the computer simulation on the model of the individual. By slight modifications on these results, eight types of the apportionment mode were obtained. The most efficient mode for the recall of the alphabets in the free-recall experiment was determined as the optimum-apportionment mode of the individual. As the experimental results, the presentation time in the first several characters was long, while the one for the latter part of the sequence was short. These apportionment modes can be applied to the cases with seven symbols, each of which expresses some information of indication, warning, situation, and so on, which is presented sequentially in the same position.
