Table 2.

Decision preferences and discount rates: partial correlations [95% BCa CI] controlling for age

Decision feature	1	2	3	4	5
1) Preferences for effort
2) Preferences for probability	0.007 [–0.208, 0.232]
3) Preferences for time	0.317 [0.15, 0.462]	–0.032 [–0.23, 0.188]
4) Effort log (k + 1)	0.865 [0.721, 0.915]	–0.032 [–0.232, 0.207]	0.254 [0.091, 0.415]
5) Probability log (k + 1)	–0.038 [–0.24, 0.154]	0.838 [0.734, 0.889]	–0.04 [–0.253, 0.171]	–0.088 [–0.282, 0.124]
6) Time log (k + 1)	0.216 [–0.005, 0.424]	–0.044 [–0.219, 0.148]	0.862 [0.76, 0.926]	0.103 [–0.095, 0.299]	–0.037 [–0.211, 0.126]

Notes: Decision preferences quantified as the proportion of lower effort/higher probability/sooner choices. Discount rates are k parameter values from the softmax hyperbolic discounting function. Because of their skewed distribution, discount rates are log-transformed. Significant correlations are denoted in bold typeface. Bias-corrected and accelerated bootstrapped confidence intervals (DiCiccio et al., 1996) were computed using 2000 replications.