Figure 4.
Predicted weights and fit quality of the weighted-sum model. (A) The complete stimulus set: gratings of different contrasts and their combinations (plaids). Population responses to plaids are fitted by the weighted sum of the responses to the component gratings (weighted-sum model, curves). Error bars indicate ± 1 SE of responses across sites in each bin. (B–G) Predicted weights (left) and average fit quality (right) for N = 9 experiments, for the weighted-sum model with best-fitting weights (B–C), equal weights (D–E), and winner-take-all weights (F–G) presented in the same format as (A). Plaid angle was 90 deg in 5 experiments, 45 deg in 2 experiments, and 30 deg in 2 experiments. Data in (A) are from experiment 82-6-3, plaid angle = 90 deg.