Fig 7. Descriptive model fits.
A. Psychometric functions for two individual observers who participated in additional experimental sessions, in which the target was presented to the left eye and the competitor presented to the right eye. The corresponding data for right-eye targets are the same as the data reported in Fig 5. Filled dots, psychophysical performance. Curves, best fit Naka-Rushton functions. B. Best-fit c 50 and d'm parameter values for each individual observer. LE represents left-eye target, and RE represents right-eye target. Error bars, bootstrapped 95% confidence intervals.