A hyperbolic decay of subjective probability of obtaining delayed rewards

Table 2 Each subject's delay (k_d) and probability (k_p) discount rates and decay rate k_spof subjective probability of obtaining delayed rewards (SP).

Subject's ID	k _d	k _p	k _sp	Subject's ID	k _d	k _p	k _sp
1	0.000620	1.3047	n.a.	16	0.001757	0.9972	0.012409
2	0.000320	1.5601	0.025945	17	0.000455	1.0612	0.027894
3	0.002862	1.3140	0.007099	18	0.000928	1.0243	0.000631
4	0.000385	1.1339	n.a.	19	n.a.	0.4244	0.000116
5	0.004214	1.1543	0.025158	20	0.000144	1.4166	n.a.
6	0.000388	0.3495	0.022878	21	0.000053	0.6046	0.000333
7	0.000645	1.6229	0.002207	22	0.000378	0.5443	0.013914
8	0.004837	2.8802	0.002156	23	0.000224	24.9100	0.225340
9	0.001377	0.5892	0.000737	24	0.000115	0.8915	0.000031
10	0.021098	1.4429	0.000059	25	0.000170	1.3478	0.000002
11	0.008886	1.1245	0.017660	26	0.001646	3.4975	0.000026
12	0.035444	1.5373	0.028255	27	0.054930	0.9969	0.027064
13	0.000131	2.1120	0.000030	28	0.000052	0.7414	0.000347
14	0.000035	0.6274	0.000038	29	0.004808	0.0337	0.312700
15	0.000000062	0.5930	0.000640	30	0.001757	1.0714	0.015360
				Median	0.000489	1.0170	0.001395

Note that all k parameters were estimated with hyperbolic functions (not with exponential functions). n.a. indicates failure in estimating parameters in nonlinear regression [20].

ISSN: 1744-9081