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Absolute difference of AIC for the fitted linear (blue, locations where linear model has smaller AICs) and exponential (red, locations where nonlinear has smaller AICs) models at each location in the 24-2 VF. The size of each circle corresponds to the magnitude of the absolute value of the AIC difference, with larger circles indicating bigger differences (left); estimates of the mean rate of VF change in dB/y at each test location (right).
