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Abstract: Short-term memory was studied on 240 normal humans aged 65-90, in-cluding peasants, workers, cadres and housekeepers, with a control group offifty 20-24 year olds. The results indicate:1. The effciency of memory significantly decreases with aging in the re-production of logical stories, free recall of pictures, digit span and directedmemory. Except in memory span, subjects from 65 to 90 also show a similartendency of memory decline with the increase of age. The performances of thegroups of 65 yr. olds and 75 yr, olds are close to those of the groups aged 70and 80 respectively.2. The fact that the aged have better performances on digit forward andbigber percentage of correct responses on the last item of stimuli series suggestsless loss in their primary memory than in other aspects.3. For the young group, the four performances in short-term memorystand in an orderly series, with the score of memory of pieces of story as thehighest, then the recall of the picture, digit forward, and directed memoryas the lowest. Tbe performances of the aged group, however, do not show sucha clear order. In subjects over 75, the performances on digit forward becomerelatively better than those on the other three tests.4. Under the condition of this study, the performances of memory are sig-nificantly related with education factor, the performances of educated sub-jects are markedly better than those of the non-educated.

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