TABLE 2.

Results of the multilevel models conducted for motivation.

	Baseline trial	Comparison trial	Intercept	Parameter estimate	95% CI	t	p
Main effect of trial	Non-self-control exertion	Short duration self-control exertion	7.52	–3.43	−2.47, −4.54	–2.73	0.007
		Medium duration self-control exertion		–3.78	−2.76, −4.92	–2.09	0.037
		Long duration self-control exertion		–3.34	−2.32, −4.56	–2.65	0.008
	Short duration self-control exertion	Medium duration self-control exertion	6.13	5.38	4.18, 6.53	0.62	0.537
		Long duration self-control exertion		–4.90	−3.63, −6.19	–0.15	0.884
	Medium duration self-control exertion	Long duration self-control exertion	6.48	–4.53	−3.29, −5.83	–0.71	0.476
Trial * time interaction	Non-self-control exertion	Short duration self-control exertion	7.52	5.02	4.69, 5.34	0.11	0.916
		Medium duration self-control exertion		–4.98	−4.64, −5.31	–0.15	0.885
		Long duration self-control exertion		–4.51	−4.10, −4.93	–2.29	0.022
	Short duration self-control exertion	Medium duration self-control exertion	6.13	–4.96	−4.61, −5.31	–0.24	0.815
		Long duration self-control exertion		–4.94	−4.51, −5.38	–2.28	0.023
	Medium duration self-control exertion	Long duration self-control exertion	6.48	–4.54	−4.10, −4.98	–2.08	0.039
Initial pain	Non-self-control exertion	Short duration self-control exertion	6.49	–1.53	−0.63, −2.44	–3.32	0.001
		Medium duration self-control exertion		–1.52	−0.62, −2.43	–3.29	0.001
		Long duration self-control exertion		–2.33	−1.43, −3.24	–5.04	<0.001
	Short duration self-control exertion	Medium duration self-control exertion	4.95	0.01	−0.90, 0.92	0.02	0.982
		Long duration self-control exertion		–0.80	−1.71, 0.11	–1.73	0.088
	Medium duration self-control exertion	Long duration self-control exertion	4.96	–0.81	−1.72, 0.10	–1.75	0.084