Table 1.

AIC_c (Akaike Information Criterion with small sample correction) for exponential and hyperbolic functions in delay and probability discounting, and SP (subjective probability of obtaining delayed rewards)

	Exponential	Hyperbolic
Delay discounting	92.33	86.49
Probability discounting	90.59	82.33
SP (subjective probability)	-6.7	- 14.37

Hyperbolic functions better fit behavioral data in delay and probability discounting and SP. Note that smaller AIC_c indicates better fitting.