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Title: Investigating the speed-accuracy trade-off: better use deadlines or response signals?
Authors: Dambacher, Michael
Hübner, R.
First Published: 9-Jan-2013
Publisher: Springer Verlag; Psychonomic Society
Citation: Behavior Research Methods, 2013, 45 (3), pp. 702-717
Abstract: Deadlines (DLs) and response signals (RSs) are two well-established techniques for investigating speed-accuracy trade-offs (SATs). Methodological differences imply, however, that corresponding data do not necessarily reflect equivalent processes. Specifically, the DL procedure grants knowledge about trial-specific time demands and requires responses before a prespecified period has elapsed. In contrast, RS intervals often vary unpredictably between trials, and responses must be given after an explicit signal. Here, we investigated the effects of these differences in a flanker task. While all conditions yielded robust SAT functions, a right-shift of the curves pointed to reduced performance in RS conditions (Experiment 1, blocked; Experiments 2 and 3, randomized), as compared with DL conditions (Experiments 1-3, blocked), indicating that the detection of the RS imposes additional task demands. Moreover, the flanker effect vanished at long intervals in RS settings, suggesting that stimulus-related effects are absorbed in a slack when decisions are completed prior to the signal. In turn, effects of a flat (Experiment 2) versus a performance-contingent payment (Experiment 3) indicated that susceptibility to response strategies is higher in the DL than in the RS method. Finally, the RS procedure led to a broad range of slow responses and high accuracies, whereas DL conditions resulted in smaller variations in the upper data range (Experiments 1 and 2); with performance-contingent payment (Experiment 3), though, data ranges became similar. Together, the results uncover characteristic procedure-related effects and should help in selection of the appropriate technique.
DOI Link: 10.3758/s13428-012-0303-0
ISSN: 1554-351X
eISSN: 1554-3528
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © Psychonomic Society, Inc. 2013. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website. The final publication is available at Springer via
Appears in Collections:Published Articles, Dept. of Neuroscience, Psychology and Behaviour

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