Type

Journal Article

Authors

Simon P Kelly
Paul M Dockree
Redmond G O'Connell

Subjects

Psychology

Topics
adolescent reaction time auditory perception decision making psychomotor performance female motion perception signal transduction male young adult physiology photic stimulation humans acoustic stimulation

A supramodal accumulation-to-bound signal that determines perceptual decisions in humans. (2012)

Abstract In theoretical accounts of perceptual decision-making, a decision variable integrates noisy sensory evidence and determines action through a boundary-crossing criterion. Signals bearing these very properties have been characterized in single neurons in monkeys, but have yet to be directly identified in humans. Using a gradual target detection task, we isolated a freely evolving decision variable signal in human subjects that exhibited every aspect of the dynamics observed in its single-neuron counterparts. This signal could be continuously tracked in parallel with fully dissociable sensory encoding and motor preparation signals, and could be systematically perturbed mid-flight during decision formation. Furthermore, we found that the signal was completely domain general: it exhibited the same decision-predictive dynamics regardless of sensory modality and stimulus features and tracked cumulative evidence even in the absence of overt action. These findings provide a uniquely clear view on the neural determinants of simple perceptual decisions in humans.
Collections Ireland -> Trinity College Dublin -> PubMed

Full list of authors on original publication

Simon P Kelly, Paul M Dockree, Redmond G O'Connell

Experts in our system

1
Simon P Kelly
University College Dublin
Total Publications: 42
 
2
Paul M Dockree
Trinity College Dublin
Total Publications: 33
 
3
Redmond G O'Connell
Trinity College Dublin
Total Publications: 52