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. Author manuscript; available in PMC: 2011 Sep 16.
Published in final edited form as: J Neurosci. 2011 Mar 16;31(11):3968–3980. doi: 10.1523/JNEUROSCI.5373-10.2011

Figure 6.

Figure 6

Abstract relative-distance tuning. (A) A feature-distance index varied from −1.0, which indicated complete selectivity for trials in which the red stimulus appeared farther from the reference, to +1.0, which indicated complete selectivity for trials in which the blue stimulus appeared farther, with 0.0 indicating no selectivity. For most cells, the selectivity for blue-farther trials changed little when the blue circle had appeared above the reference (abscissa) or below the reference (ordinate) (461of 509, 90.1%, in PA; 98 of 107, 91.6%, in PFdl). A minority of cells showed a preference for the downward stimulus (upper left quadrant) or upward (lower right quadrant) being farther (48 of 509, 9.4%, in PA; 9 of 107, 8.4%, in PFdl). (B) As in A, but for the order-distance index. Order-distance coding changed little based on stimulus position (391 of 428, 91.3% in PA; 75 of 85, 88.2%, in PFdl). A minority of cells coded whether the upward stimulus (lower right quadrant) or downward stimulus (upper left quadrant) had been farther from the reference (37 of 428, 8.6%, in PA; 10 of 85, 11.8%, in PFdl). In parenthesis the correlation r between indexes for up and down trials.