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Go-stimuli probability influences response bias in the sustained attention to response task: a signal detection theory perspective

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Abstract

The sustained attention to response task (SART) is a popular measure in the psychology and neuroscience of attention. The underlying psychological cause for errors, in particular errors of commission, in the SART is actively disputed. Some researchers have suggested task-disengagement due to mind-wandering or mindlessness, and others have proposed strategic choices. In this study we explored an alternative perspective based on Signal Detection Theory, in which the high rate of commission errors in the SART reflects simply a shift in response bias (criterion) due to the high prevalence of Go-stimuli. We randomly assigned 406 participants to one of ten Go-stimuli prevalence rates (50%, 64%, 74%, 78%, 82%, 86%, 90%, 94%, 98% and 100%). As Go-stimuli prevalence increased reaction times to both Go and No–Go stimuli decreased, omission errors decreased and commission errors increased. These all were predicted from a hypothesized bias shift, but the findings were not compatible with some alternative theories of SART performance. These findings may have implications for similar tasks.

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Data availability statement

The dataset for the current study is not publicly available due the fact that they constitute an excerpt of research in progress but are available from the corresponding author on reasonable request.

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Correspondence to William S. Helton.

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All procedures performed in this study involving human participants were in accordance with the ethical standards of the institutional research committee of the University of Canterbury and with the 1964 Helsinki Declaration and its later amendments.

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Bedi, A., Russell, P.N. & Helton, W.S. Go-stimuli probability influences response bias in the sustained attention to response task: a signal detection theory perspective. Psychological Research 87, 509–518 (2023). https://doi.org/10.1007/s00426-022-01679-7

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  • DOI: https://doi.org/10.1007/s00426-022-01679-7

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