Fig. 7.

Model parameters vary systematically across visual cortex. A: changes in pRF size. We fit a line relating eccentricity and size for each visual field map. The band around each line indicates a bootstrap estimate of the standard error (see Supporting Fig. F for details). Size increases with eccentricity and increases in extrastriate maps. B: changes in pRF exponent. The median exponent in each map is plotted against the average size at 5° (deg) of eccentricity. In all maps, the median exponent is <1, indicating a compressive nonlinearity. Maps with larger sizes tend to have smaller exponents.