Figure 4

Preferred Wavelength and stimulus size. Dependence of preferred spatial wavelength on stimulus size. Results from monkey K (data from monkey B are similar). Green line indicates the preferred spatial frequency estimate at a given stimulus size. The gray area denotes the population mean of the individual variances. (A) Normalized preferred spatial wavelength is plotted with respect to absolute stimulus size. Variance of the estimate decreases as stimulus size increases. (B) Normalized preferred spatial wavelength is plotted with respect to normalized stimulus size. The blue line indicates the number of recording sites available for averaging at this particular normalized stimulus size. Variance of the estimate decreases as normalized stimulus size approaches 0, i.e., summation field size, but stays constant for larger stimuli. Significant deviations from preferred spatial wavelength are coded in red.