PURPOSE: To investigate whether the metric quality of mental spatial representations of the environment changes with aging, by means of mental scanning of locomotor space. METHOD: Twenty young adults (age 21.1-30.8) and 20 old adults (age 60.4-76.4) were submitted to a battery of psychometric tests to assess the effects of aging on general cognitive functions and specific visuo-spatial abilities, and to determine which cognitive factors correlated with scanning performance. The mental scanning task followed. Participants firstly had to learn a path comprising six positions by walking and observing these; secondly, they had to use mental imagery to scan from a first to a second position, according to different distances. RESULTS: Aging reduces the validity of the metric information incorporated by mental spatial representations. Attentional and working memory resources, ability to manipulate spatial information and a general factor of abstract visuo-spatial reasoning strongly correlated with scanning performance. Finally, aging seemed to have a selective effect on cognitive functioning. CONCLUSIONS: Age differences emerge when demanding storage and processing of information are simultaneously required, as predicted by the Limited Resources view of aged cognition.
PURPOSE: To investigate whether the metric quality of mental spatial representations of the environment changes with aging, by means of mental scanning of locomotor space. METHOD: Twenty young adults (age 21.1-30.8) and 20 old adults (age 60.4-76.4) were submitted to a battery of psychometric tests to assess the effects of aging on general cognitive functions and specific visuo-spatial abilities, and to determine which cognitive factors correlated with scanning performance. The mental scanning task followed. Participants firstly had to learn a path comprising six positions by walking and observing these; secondly, they had to use mental imagery to scan from a first to a second position, according to different distances. RESULTS: Aging reduces the validity of the metric information incorporated by mental spatial representations. Attentional and working memory resources, ability to manipulate spatial information and a general factor of abstract visuo-spatial reasoning strongly correlated with scanning performance. Finally, aging seemed to have a selective effect on cognitive functioning. CONCLUSIONS: Age differences emerge when demanding storage and processing of information are simultaneously required, as predicted by the Limited Resources view of aged cognition.