Table 1.

GLMER model of caffeine effects on EEfRT choice behavior (n = 18).

Fixed effects	B (log odds of HC/HR choice)	SE	z-value	p
Drug	−0.06	0.14	0.44	0.66
Probability
Linear	2.14	0.11	19.53	<0.001
Quadratic	0.39	0.09	4.28	<0.001
Reward value	1.14	0.05	21.39	<0.001
Expected value
(Probability×Reward value)
Linear probability×Reward value	0.12	0.12	0.99	0.32
Quadratic probability×Reward value	0.30	0.11	2.76	0.006
Drug×Probability
Drug×Linear probability	−0.34	0.33	1.05	0.29
Drug×Quadratic probability	−0.01	0.29	0.04	0.97
Drug×Reward value	−0.07	0.16	0.42	0.67
Drug×Expected value
Drug×Linear     probability×Reward value	0.18	0.38	0.47	0.64
Drug×Quadratic     probability×Reward value	0.01	0.35	0.03	0.97
Session
Linear	0.63	0.12	5.46	<0.001
Quadratic	−0.28	0.10	2.87	0.004
Trial order	−0.008	0.003	2.89	0.004