Skip to main content
. 2011 Jan 28;5:2. doi: 10.3389/fnins.2011.00002

Figure 2.

Figure 2

(Top) No autocorrelation of biological time (ρ = 0). The discounting curve in biological time is exponential with discount rate equal to 1. It generates the dotted discounting curve in calendar time (“ZeroCorr”). The best exponential (“Exp”) fit in calendar time produces a discount rate of 0.30, and the best hyperbolic fit (“Hyp”) has a discount rate equal to 2.75. (Bottom) Very high autocorrelation of biological time (ρ = 0.97). The discounting curve in biological time is exponential with discount rate equal to 1. It generates the dotted discounting curve in calendar time (“HighCorr”). The best exponential (“Exp”) fit in calendar time produces a discount rate of 0.45, and the best hyperbolic fit (“Hyp”) in calendar time has discount rate equal to 1.75.