TABLE 1.

Results of the multilevel models conducted for perceptions of pain.

	Baseline trial	Comparison trial	Intercept	Parameter estimate	95% CI	t	p
Main effect of trial	Non-self-control exertion	Short duration self-control exertion	1.76	5.68	4.79, 6.53	3.17	0.002
		Medium duration self-control exertion		5.98	5.10, 6.81	16.40	< 0.001
		Long duration self-control exertion		6.25	5.30, 7.12	0.89	0.376
	Short duration self-control exertion	Medium duration self-control exertion	2.35	5.31	4.39, 6.21	0.66	0.507
		Long duration self-control exertion		5.59	4.59, 6.55	1.16	0.246
	Medium duration self-control exertion	Long duration self-control exertion	2.58	5.28	4.39, 6.16	0.56	0.579
Trial * time interaction	Non-self-control exertion	Short duration self-control exertion	1.76	5.02	4.77, 5.27	0.14	0.892
		Medium duration self-control exertion		4.97	4.71, 5.22	–0.25	0.802
		Long duration self-control exertion		5.29	4.96, 5.61	1.75	0.082
	Short duration self-control exertion	Medium duration self-control exertion	2.35	4.95	4.68, 5.22	–0.36	0.717
		Long duration self-control exertion		5.27	4.94, 5.60	1.58	0.115
	Medium duration self-control exertion	Long duration self-control exertion	2.58	5.32	4.98, 5.65	1.85	0.065
Initial pain	Non-self-control exertion	Short duration self-control exertion	3.59	0.40	−0.35, 1.15	1.04	0.303
		Medium duration self-control exertion		0.77	0.02, 1.52	2.00	0.049
		Long duration self-control exertion		1.19	0.44, 1.94	3.10	0.003
	Short duration self-control exertion	Medium duration self-control exertion	3.99	0.37	−0.38, 1.12	0.96	0.338
		Long duration self-control exertion		0.79	0.04, 1.54	2.06	0.042
	Medium duration self-control exertion	Long duration self-control exertion	4.36	0.42	-0.33, 1.17	1.10	0.275