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Gepubliceerd in: Psychological Research 4/2014

01-07-2014 | Original Article

The role of temporal delay and repeated prospective memory cue exposure on the deactivation of completed intentions

Auteurs: Moritz Walser, Franziska Plessow, Thomas Goschke, Rico Fischer

Gepubliceerd in: Psychological Research | Uitgave 4/2014

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Abstract

Previous studies have shown that completed prospective memory (PM) intentions entail aftereffects in terms of ongoing-task-performance decrements in trials containing repeated PM cues which previously served as PM cues triggering the intended action. Previous research reported that PM aftereffects decrease over time, thus revealing a specific time course of PM aftereffects. In the present study, we tested two accounts for this pattern, assuming either that the decline of aftereffects is related to the temporal distance to PM task completion or may be a result of the repeated exposure of repeated PM cues in the ongoing task. In three experiments, we manipulated both the temporal distance to PM task completion and the frequency of repeated PM cues and demonstrated that aftereffects of completed intentions declined with repeated exposure of formerly relevant PM cues. In addition, effects of repeated exposure were not only limited to the repetition of specific PM-cue exemplars but also generalized to other semantically related PM cues within the PM-cue category. Together, findings show that decreased aftereffects of completed intentions are not related to the temporal duration of the subsequent test block, but crucially depend on the repeated exposure of the previously relevant PM cues.
Voetnoten
1
The repeated cycles of PM and Test blocks differ to other approaches such as single-cycle paradigms (e.g., Scullin & Bugg, 2013). One could argue, e.g., that using repeated cycles, PM aftereffects may be overestimated when participants are ambiguous whether the intention has really finished and persist monitoring (Walser et al., 2012). In contrast, aftereffects may also be underestimated, because over the course of the experimental session, participants might learn to increasingly shield the ongoing task from deviant PMREPEATED and oddball stimuli during the Test blocks.
 
2
Sixteen participants participated in the experiment (1 male, age M = 22.56 years, SD = 4.08). In Test block 1, RTs on PM AREPEATED trials (M = 609 ms, SD = 121 ms) were slower than on oddball A trials (M = 550 ms, SD = 89 ms), F(1, 15) = 28.65, p < .001, η 2 = .66, indicating aftereffects of completed intentions (M = 59 ms). In Test block 2, no aftereffects were found for A-items (6 ms, PM AREPEATED trials: M = 553 ms, SD = 88 ms; oddball A: M = 547 ms, SD = 85 ms) nor for B-items (10 ms, PM BREPEATED trials: M = 548 ms, SD = 79 ms; oddball B: M = 538 ms, SD = 80 ms). The factor trial type was not significant. Also, Trial type × Item set did not interact, both Fs < 1.
 
3
We thank Julie Bugg for suggesting this analysis.
 
4
Although not significant, the at least numerically somewhat larger aftereffects in the 4 compared to the 12 PMREPEATED trials condition may be due to the task structure, as we cannot control for a potential imbalance of encountered oddball trials prior to the first 4 PMREPEATED trials in both conditions. It is conceivable, e.g., that in the 12 PMREPEATED trials condition participants have an increased experience of task-irrelevant deviants prior to the first 4 PMREPEATED trials, which should decrease aftereffects and RTs in trials including deviants in general (oddball trials and PMREPEATED trials alike). In fact, this is supported by a main effect of frequency, with faster responses to deviant trials in the high-frequency (12 repeat) condition compared to the low-frequency (4 repeat) condition.
 
5
This might have been caused by the increased number of post-deviant standard trials (i.e., 24) following the 24 deviant stimuli (12 PMREPEATED, 12 oddballs) in the high-frequency condition compared to the 8 post-deviant standard trials following the 8 deviant stimuli (4 PMREPEATED, 4 oddballs). Switching attention back from deviant stimuli to subsequent standard trials might have caused reorientation costs (see also Meier & Rey-Mermet, 2012). Re-analyzing standard trial RTs while excluding post-deviant standard trials strongly diminished the RT difference between low- and high-frequent conditions to a non-significant level, F(1, 23) = 2.71, p = .113, η 2 = .10.
 
6
We thank Michael Ziessler for raising this point.
 
7
We thank Julie Bugg for this suggestion.
 
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Metagegevens
Titel
The role of temporal delay and repeated prospective memory cue exposure on the deactivation of completed intentions
Auteurs
Moritz Walser
Franziska Plessow
Thomas Goschke
Rico Fischer
Publicatiedatum
01-07-2014
Uitgeverij
Springer Berlin Heidelberg
Gepubliceerd in
Psychological Research / Uitgave 4/2014
Print ISSN: 0340-0727
Elektronisch ISSN: 1430-2772
DOI
https://doi.org/10.1007/s00426-013-0510-z

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