We found four peak drift rates for orientations 15° away from the vertical and horizontal axes.
Mean firing rate for each orientation was calculated between response onset (40 100 msec) and response offset.
The firing rate for each orientation was averaged from 25 ms to 90ms after the onset of the grating.
If surround stimuli reduce firing rates for non-preferred orientation stimuli to zero, a fit to those data may yield 'apparently' more narrow tuning curves, as cells cannot exhibit negative firing rates.
The ultimate stress strain behavior with respect to change in strain rates for various fiber orientations has been studied in depth.
Figure 2 presents the error rates and reaction times separately for orientation (Figure 2a) and color targets (Figure 2b).
It was measured using raw tuning curves, by dividing the firing rate at the orthogonal orientations by the firing rate for the preferred orientation, and subtracting the result from one [42], [43].
This was attributable to slightly higher firing rates for gratings of the preferred orientation, but substantially lower firing rates for gratings of orientations close to the non-preferred orientation, when compared with the plaid pattern.
Furthermore, error rates were overall higher for color than for orientation targets (5.6% vs. 3.6%), F 1,11) = 27.3, p<.0003, with the effect of the feature contrast manipulation being more pronounced for the color than for orientation: F 2,22) = 3.8, p<.04.
The refusal rate for the sexual orientation identity question was low, particularly in the web survey, and differences in how this question was administered were not found to influence results materially.
