Attention and performance XIV (silver jubilee volume)
Common Neural Substrates for Response Selection across Modalities and Mapping Paradigms
Journal of Cognitive Neuroscience
Dissociating the Neural Mechanisms of Visual Attention in Change Detection Using Functional MRI
Journal of Cognitive Neuroscience
The Constraints Functional Neuroimaging Places on Classical Models of Auditory Word Processing
Journal of Cognitive Neuroscience
Neural Activation During Response Competition
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Imaging Cognition II: An Empirical Review of 275 PET and fMRI Studies
Journal of Cognitive Neuroscience
Common blood flow changes across visual tasks: Ii. decreases in cerebral cortex
Journal of Cognitive Neuroscience
fMRI of Past Tense Processing: The Effects of Phonological Complexity and Task Difficulty
Journal of Cognitive Neuroscience
Neural Mechanisms for Response Selection: Representation Specific or Modality Independent?
Journal of Cognitive Neuroscience
Common Neural Substrates for Response Selection across Modalities and Mapping Paradigms
Journal of Cognitive Neuroscience
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Behavioral evidence supports a dissociation between response selection (RS; stimulus-to-response [S-R] mapping) and perceptual discrimination (PD): The former may be subject to a central processing bottleneck, whereas the latter is not (Pashler, 1994). We previously (Jiang & Kanwisher, 2003) identified a set of frontal and parietal regions involved in RS as those that produce a stronger signal when subjects follow a difficult S-R mapping rule than an easy mapping rule. Here, we test whether any of these regions are selectively activated by RS and not perceptual processing, as predicted by the central bottleneck view. In Experiment 1, subjects indicated which of four parallel lines was unique in length; PD was indexed by a higher BOLD response when the discrimination was difficult versus easy. Stimuli and responses were closely matched across conditions. We found that all regions-of-interest (ROIs) engaged by RS were also engaged by perceptual processing, arguing against the existence of mechanisms exclusively involved in RS. In Experiments 2 and 3, we asked what processes might go on in these ROIs, such that they could be recruited by both RS and perceptual processing. Our data argue against an account of this common activation in terms of spatial processing or general task difficulty. Thus, PD may recruit the same central processes that are engaged by RS.