Accumulating evidence about what prospective memory costs actually reveal

Strickland, Luke, Heathcote, Andrew, Remington, Roger W and Loft, Shayne (2017) Accumulating evidence about what prospective memory costs actually reveal. Journal of experimental psychology. Learning, memory, and cognition, 43 10: 1616-1629. doi:10.1037/xlm0000400

Author Strickland, Luke
Heathcote, Andrew
Remington, Roger W
Loft, Shayne
Title Accumulating evidence about what prospective memory costs actually reveal
Journal name Journal of experimental psychology. Learning, memory, and cognition   Check publisher's open access policy
ISSN 1939-1285
Publication date 2017-10-01
Year available 2017
Sub-type Article (original research)
DOI 10.1037/xlm0000400
Open Access Status Not yet assessed
Volume 43
Issue 10
Start page 1616
End page 1629
Total pages 14
Place of publication Washington, DC United States
Publisher American Psychological Association
Language eng
Abstract Event-based prospective memory (PM) tasks require participants to substitute an atypical PM response for an ongoing task response when presented with PM targets. Responses to ongoing tasks are often slower with the addition of PM demands ("PM costs"). Prominent PM theories attribute costs to capacity-sharing between the ongoing and PM tasks, which reduces the rate of processing of the ongoing task. We modeled PM costs using the Linear Ballistic Accumulator and the Diffusion Decision Model in a lexical-decision task with nonfocal PM targets defined by semantic categories. Previous decision modeling, which attributed costs to changes in caution rather than rate of processing (Heathcote et al., 2015; Horn & Bayen, 2015), could be criticized on the grounds that the PM tasks included did not sufficiently promote capacity-sharing. Our semantic PM task was potentially more dependent on lexical decision resources than previous tasks (Marsh, Hicks, & Cook, 2005), yet costs were again driven by changes in threshold and not by changes in processing speed (drift rate). Costs resulting from a single target focal PM task were also driven by threshold changes. The increased thresholds underlying nonfocal and focal costs were larger for word trials than nonword trials. As PM targets were always words, this suggests that threshold increases are used to extend the time available for retrieval on PM trials. Under nonfocal conditions, but not focal conditions, the nonword threshold also increased. Thus, it seems that only nonfocal instructions cause a global threshold increase because of greater perceived task complexity. (PsycINFO Database Record
Keyword Nonfocal Prospective Memory
Task Interference
Executive Control
Ongoing Task
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID DP160101891
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Psychology Publications
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Created: Wed, 15 Nov 2017, 12:39:48 EST