Figure 6 shows the results from our simulations.
Figure 6a shows how simulated average dominance durations for the V rival pattern (solid lines) and the D rival pattern (dotted lines) vary as a function of adaptation rate of the V pattern, i.e.,
g(
V); the adaptation rate for the D pattern remains constant. The different colored lines denote stimulus conditions in which the V pattern is assigned different values of
σ ɛ , i.e., different degrees of recurrent excitatory spread of the V pattern (shown by the colored gradients within the figures). When
g(
V) is 0, adaptation rate is 1 (i.e., the original version of the Wilson et al. model); for these parameter values, the simulated dominance durations associated with the V pattern increase and dominance durations of the D pattern decrease as the spatial extent of recurrent excitation broadens. Of particular relevance, note that predicted dominance durations for V are always longer than predicted durations for D, an outcome that, in fact, is not observed empirically (recall
Figure 5 and the results from Alais et al.,
2006). For non-zero values of
g(
V), however, simulated dominance durations of the V pattern systematically decrease whereas simulated dominance durations of the D pattern increase. Note that there is a value of
g(
V) where the dominance durations for the D and V patterns are comparable, i.e., the pattern of results found by us and by Alais et al. (
2006).
Figure 6b shows the same pattern of results for simulations of dominance durations for rivalry between the H pattern (solid lines) and the D pattern (dotted lines). Now when
g(
H) is 0 (i.e.,
γ = 1.0), dominance durations for the H pattern are consistently less than dominance durations for the D pattern, contrary to our findings. For non-zero values of
g(
H), dominance durations for D and for H patterns are inversely affected, and once again there is an adaptation rate value at which those two patterns produce comparable simulated dominance durations. The patterns of simulated results in
Figures 6a and
6b thus confirm that pattern-dependent adaptation rate brings the behavior of this model in line with empirical results. Moreover, it is worth noting that the values of
g(
V) and
g(
H) that yield comparable dominance durations for V and D patterns and for D and H patterns, respectively, approximate the values of
g(
V) and
g(
H) that reproduce the traveling wave speed results from
Experiment 1 (see
Figure 4d).