. Author manuscript; available in PMC: 2017 Nov 1.

Published in final edited form as: J Exp Anal Behav. 2016 Nov;106(3):242–253. doi: 10.1002/jeab.228

Table 2.

Parameter estimation results based on the two-part mixed effects model for the Enhanced Quit & Win data

Parameter	Estimates	SE	p-value
Part I model parameters
β₀	−2.929	0.079	<.0001
β₁	1.541	0.062	<.0001

Part II model parameters
logQ₀	2.563	0.018	<.0001
k	3.210	0.020	<.0001
α	0.448	0.011	<.0001

Variance parameters
σ_a²	1.459	0.175	<.0001
σ_b²	0.381	0.016	<.0001
σ_c²	0.094	0.005	<.0001
σ_ab	−0.234	0.034	<.0001
σ_ac	0.308	0.023	<.0001
σ_bc	0.047	0.006	<.0001
σ_e²	0.058	0.001	<.0001

Note. SE: standard error.