Abstract
The aim of the present study was to extend previous lifespan research to a wide age range (5 to 80 year olds) and investigate any potential differences in the development and decline of working memory functions. To that end, measures of both verbal and visuo-spatial working memory were included in a cross-sectional study. The findings indicated that there is considerable growth in childhood–on average 23 standard points; with performance peaking in 30-year olds. There was relatively little change in working memory performance in older adults, with 70 to 80 year olds performing at comparable levels to teenagers (13–19 year olds) in verbal working memory tests. Confirmatory factor analyses suggest that working memory skills across the lifespan are driven by domain differences (i.e., verbal or visuo-spatial stimuli), rather than functional differences (maintenance and manipulation of information).
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