Availability of related long-term memory during and after attention focus in working memory

Woltz, Dan J.; Was, Christopher A. · 2006 · OpenAlex-citations

DOI: 10.3758/bf03193587

archive: archived pipeline: cataloged verified

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Summary

This study investigates the relationship between attention-driven working memory (WM) processes and the temporary availability of semantically related long-term memory (ALTM). Motivated by theoretical models that propose WM includes not only information in the focus of attention but also activated, unattended LTM structures, the authors sought to determine if the magnitude and pattern of indirect semantic priming reflect the specific type of attention processing in WM. The research addresses a gap in prior literature, which often failed to distinguish between the availability of just-processed information and the accessibility of related domain knowledge during complex cognitive tasks. The researchers conducted four experiments using a novel task combining short-term verbal retention with semantic priming measures. Participants were presented with a memory load of four words from two semantic categories. They received instructions to focus attention on one category (the "focused" category) while ignoring the other. After recalling the focused items, participants performed same-different category membership comparisons using new exemplars from the focused category, the ignored category, and an unprimed control category. This design allowed the authors to measure ALTM via response speed and accuracy on the priming trials, assessing whether attention-driven processing increased the accessibility of related LTM structures. The experiments varied the timing of attention demands relative to the priming measures to test if ALTM processes require additional cognitive resources. The results demonstrated that attention-driven processing in WM significantly increased the availability of semantically related LTM. Participants showed faster and more accurate responses for comparisons involving the focused category compared to the unprimed category, confirming that WM operations facilitate access to related memory structures. Crucially, the patterns of priming were equivalent whether attention demands occurred prior to or concurrent with the priming measures. This suggests that ALTM processes either do not require additional cognitive resources or rely on resources independent of those underlying effortful WM maintenance. The study found that the amount and type of attention-driven processing directly influenced the accessibility of semantically related memory, supporting the view that WM capacity is defined by both attentional focus and automatic LTM activation. These findings support alternative WM models, such as those by Cowan and Oberauer, which incorporate active but unattended information as part of a limited-capacity cognitive workspace. The study provides empirical evidence that LTM activation processes are distinct from attention-driven WM processes in terms of resource constraints. By demonstrating that related LTM becomes available without competing for the same resources as active maintenance, the research clarifies the functional relationship between WM and LTM. This has implications for understanding complex cognitive activities like language comprehension, where the integration of new information with existing knowledge structures relies on the simultaneous availability of attended and unattended memory elements.

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Topics

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• working memory
• long term semantic memory