Figure 5.

Parameter estimates from the model in Equation 1. Each column shows values for one observer. The two rows correspond to values for surround strength and neural phase difference, respectively. In the top row, surround strength R_S is on the vertical axis and temporal frequency is on the horizontal axis. Monocular (dichoptic) surround strengths are shown by red (green) circles, with solid and dashed lines corresponding to the 0.025 and 0.05 Michelson contrast surrounds, respectively. In the bottom row, phase shift φ is on the vertical axis and temporal frequency is on the horizontal axis. Symbol coding is the same as for the panels in the top row. Surround strengths and phases were estimated using Equation 2. The standard errors for each parameter estimate (shown by the vertical bars) were calculated using a bootstrapping method as described in the text.