Abstract
Rationale
The 5-choice serial reaction time task (5-CSRTT) is commonly used to assess attention in rodents. Manipulation of this task by decreasing the light stimulus duration is often used to probe attentional capacity and causes a decrease in accuracy and an increase in omissions. However, although a decrease in response accuracy is commonly interpreted as a decrease in attention, it is more difficult to interpret an increase in omissions in terms of attentional performance.
Methods
Here we present a series of experiments in rats that seeks to investigate the origins of these key behavioral measures of attention in the 5-CSRTT. After an initial training in the 5-CSRTT, rats were tested in a variable stimulus duration procedure to increase task difficulty and probe visual attentional capacity under several specific controlled conditions.
Conclusions
We found that response accuracy reflects visuospatial sustained attentional processing, as commonly interpreted, while response omission reflects rats’ ignorance about the stimulus location, presumably due to failure to pay attention to the curved wall during its presentation. Moreover, when rats lack of relevant information, they choose not to respond instead of responding randomly. Finally, pretreatment with nicotine selectively decreased response omissions, without affecting response accuracy, particularly when the attentional demand was high. Overall, our results indicate that response accuracy and response omission thus correspond to two distinct attentional states.
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Acknowledgements
This work was supported by the French Research Council (CNRS), the Université de Bordeaux, and the French National Agency (ANR- 15-CE37-0008-01; K.G.).
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K.G. and S.H.A designed research and experiments; C.V.M, A.D. and K.G. performed behavioral experiments and associated data analysis; K.G. and S.H.A. wrote the paper.
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Vouillac-Mendoza, C., Durand, A., Ahmed, S.H. et al. Knowledge by omission: the significance of omissions in the 5-choice serial reaction time task. Psychopharmacology (2024). https://doi.org/10.1007/s00213-024-06564-2
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DOI: https://doi.org/10.1007/s00213-024-06564-2