Figure 3.

(A) The model mean MSTd population activation yields a linear (R² = 1) separation between the peak timings in the near (165 ms), behaviorally relevant (192 ms), and far (219 ms) conditions, respectively. In these respective conditions, the model simulates the increasing distance attention traveled between the fixation and FoE locations. (B) Summary of the population peak timing in the near, behaviorally relevant, and far conditions as a function of the type of attention modeled. Additive, multiplicative, and multiplicative gain attention types all produced a linear peak timing (R² > 0.98). Modifying the sigmoidal signal function in model MSTd, as described in the text, yielded the best timing correspondence to the Dubin and Duffy (2009) data (gray line).