Individuals with low working memory spans show greater interference from irrelevant information because of poor source monitoring, not greater activation

Journal article


Lilienthal, Lindsey, Rose, Nathan S., Tamez, Elaine, Myerson, Joel and Hale, Sandra. (2015). Individuals with low working memory spans show greater interference from irrelevant information because of poor source monitoring, not greater activation. Memory & Cognition (online version). 43(3), pp. 357 - 366. https://doi.org/10.3758/s13421-014-0465-3
AuthorsLilienthal, Lindsey, Rose, Nathan S., Tamez, Elaine, Myerson, Joel and Hale, Sandra
Abstract

Although individuals with high and low working memory (WM) span appear to differ in the extent to which irrelevant information interferes with their performance on WM tasks, the locus of this interference is not clear. The present study investigated whether, when performing a WM task, high- and low-span individuals differ in the activation of formerly relevant, but now irrelevant items, and/or in their ability to correctly identify such irrelevant items. This was done in two experiments, both of which used modified complex WM span tasks. In Experiment 1, the span task included an embedded lexical decision task designed to obtain an implicit measure of the activation of both currently and formerly relevant items. In Experiment 2, the span task included an embedded recognition judgment task designed to obtain an explicit measure of both item and source recognition ability. The results of these experiments indicate that low-span individuals do not hold irrelevant information in a more active state in memory than high-span individuals, but rather that low-span individuals are significantly poorer at identifying such information as irrelevant at the time of retrieval. These results suggest that differences in the ability to monitor the source of information, rather than differences in the activation of irrelevant information, are the more important determinant of performance on WM tasks.

Year2015
JournalMemory & Cognition (online version)
Journal citation43 (3), pp. 357 - 366
ISSN1532-5946
Digital Object Identifier (DOI)https://doi.org/10.3758/s13421-014-0465-3
Page range357 - 366
Publisher's version
File Access Level
Controlled
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