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选取１９６名老年人，分４个年龄组，考察老年个体在７种基本日常活动上日常认知变化的年龄特征和个体差异。结果发现：年龄组Ⅲ（６５～６９岁）之后，日常认知的总体水平和单项水平均呈现出明显的下降趋势。其次，４个年龄组中，个体的日常认知在其总体及单项水平上均表现出一定程度的个体差异。较之前３个年龄段，组Ⅳ（７０～７９岁）个体差异的幅度最大。因而认为：成人晚期日常认知的退行性变化是不可避免的，但其退行性变化的速度和幅度却往往因人而异，表现出明显的个体差异。
A total of 196 elderly people were selected and divided into 4 age groups to investigate the age characteristics and individual differences of daily cognition changes in 7 kinds of daily activities of the elderly. The results showed that: After the age group Ⅲ (65-69 years old), the daily cognition level and the individual level showed a significant downward trend. Second, in the four age groups, individuals’ daily cognition showed a certain degree of individual differences at the overall and individual level. Compared with the previous three age groups, group IV (70-79 years old) had the largest individual differences. Therefore, it is unavoidable that the degenerative changes of daily cognition in late adult are unavoidable, but the speed and range of degenerative changes often vary from person to person, showing obvious individual differences.