Abstract
With regard to the better display of visual stimuli, one of the key parameters to match with human short-term memory is the presentation time of the information. The optimum apportionment of the presentation time of eight randomly-selected Roman alphabet letters sequentially presented through a visual display is determined for four young models by means of our time-continuous model of short-term memory. These apportionments are thought to allow for the easiest retention by short-term memory. The average optimum apportionment, as an average of individual scores of the optimum-apportionment, was also obtained. This apportionment has shown the same tendency as that in the case of eight randomly-selected Roman sounds. That is, the presentation time of the alphabet letters present in the first part is long and presentation time of the alphabet letters presented in the letter part is short. Individual differences in the optimum apportionment appear in the middle part, from the third to seventh alphabet letters, where the presentation time of one or two alphabet letters is longer than that of the previous alphabet letter and the following alphabet letter.
