Journal
TRENDS IN COGNITIVE SCIENCES
Volume 8, Issue 6, Pages 261-265Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tics.2004.04.003
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Funding
- NEI NIH HHS [R01 EY05911] Funding Source: Medline
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The effects of spatial or featural attention on the activity of neurons have been studied in many experiments that have used a variety of neurophysiological approaches. Other experiments have examined how expectations about reward are represented in neuronal activity in various brain regions. Although attention and reward are distinct concepts, I argue here that many neurophysiological experiments on attention and reward do not permit a clean dissociation between the two. This problem arises in part because reward contingencies are the only parameter manipulated in any of these experiments. I describe how attention and reward expectations have been confounded, giving rise to uncertainty about how signals related to attention and reward are distributed in the brain.
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