Figure 9
Comparison between the prediction of Model 4 and the experimental results. Probabilities are calculated with \(\sigma _{opt}=1.153\). The probability of perceiving the gradient variation is plotted for window sizes every 5 mm for the 4 gradient value conditions. These data are fitted by sigmoid curves to find the window size thresholds predicted by the model. Thresholds from the experiment are plotted in gray.
