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Spatial working memory in individuals with intellectual disabilities: Effects of task presentation format

[Speaker] Oi, Yuhei:1
[Co-author] Okuzumi, Hideyuki:1, Kokubun, Mitsuru:1
1:Tokyo Gakugei University (Japan)

Recent studies have demonstrated that individuals with genetic etiologies of intellectual disabilities have different spatial working memory performance depending on the task presentation format. This study compared 25 individuals with intellectual disabilities of unknown etiology (ID group: 6 female; mean age 31.9 years) to 25 typically developing children matched for nonverbal mental age (TD group: 6 female; mean age 5.5 years) in spatial working memory tasks of two types. In the spatial-simultaneous working memory task, participants were asked to remember a series of locations presented simultaneously on a matrix; in the spatial-sequential task, locations to be remembered were presented one-by-one. Results showed that the ID group outperformed the TD group in the spatial-simultaneous task, although their results of the spatial-sequential task were not mutually different. These findings suggest that individuals with intellectual disabilities of unknown etiology have an atypical pattern of development in different components of spatial working memory.
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