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Review
. 2007 Oct 10;27(41):10919-21.
doi: 10.1523/JNEUROSCI.2957-07.2007.

Does reward modulate actions or bias attention?

Robert J Adam  1 , Sanjay G Manohar
Affiliations
Review

Does reward modulate actions or bias attention?

Robert J Adam et al. J Neurosci. .
No abstract available

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Figures

Figure 1.
Figure 1.
A, Subjects fixated a red central target. After a 400 ms blank period, a rewarded target appeared on the left or right with a probability distribution that remained constant for each block. For 60% of the trials, this is all that occurred. On 30% of trials, a green distractor was presented in one of four locations (here illustrated by open circles), halfway through the waiting period (at 200 ms). Two of these locations were identical to the target locations. The other two were in the midline, above and below center. Saccades to the target were rewarded unless an intervening oculomotor capture (saccade to the distractor) had occurred. B, Additional dual-target trials (10%) were presented in which subjects chose to saccade either to the left or right location (bottom).
Figure 2.
Figure 2.
A, In experiment 2, more distractor locations were used to map the efficacy of capture by distractors. Two (5 × 5) grids of possible distractor locations were used (50 total locations). The center of each represented the real target location. B, The proportion of oculomotor captures decreased as a linear function of absolute distance of the distractor from the target. The gradient of the function decreased with decreasing expected value. C, The locations of distractors and the number of erroneous saccades made to them were used to develop contour maps of the oculomotor captures made at each location. Here, the expected target is to the left with a relative expected value of 0.99.
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