Fig. 5

FCD model captures the variation between individuals in the durations of exploration-exploitation. In the FCD circuit (Eqs. (5) and (6)), a single parameter, g, the rate of meaning accumulation, sets the correlation between durations of exploration and exploitation. Shown are different simulation runs, grouped by different α values, while g values vary according to the color bar. Small g values show a thorough slow-to-discover/slow-to-drop behavior, while large g values show a mercurial quick-to-discover/quick-to-drop behavior, both as seen in the behavioral data. The second parameter, α, the attention threshold to saturation increase, controls the perpendicular principal component of behavioral data variation (see Supplementary Fig. 4, for similar simulation of the non-FCD circuit, Eqs. (7) and (8))