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A. Duration as a function of the index of difficulty (ID) for 3 distances (10, 20 and 30 cm) and different values of vigor and discount (see legend). B. Typical spatiotemporal variability (s.d. of position). C. Endpoint variability for different values of the discount factor. Color is for the level of vigor (legend in A). Results obtained with Object II. Parameters: distance = 30 cm, r = 1, ρ/ε = 100, γ = 2, σSINs = .001, σSDNm = 1.
