. Author manuscript; available in PMC: 2015 Apr 1.

Published in final edited form as: J Exp Psychol Gen. 2013 Jul 8;143(2):895–913. doi: 10.1037/a0033580

Table 2.

Linear mixed-effects regression results for fixation duration

		model			Values (ms)			Model comparison
		b	SE	t	low	median	High	AIC+	χ²	p
(Intercept)		259.74	12.32	21.08

word n−1	Frequency	−1.69	.52	−3.24	249	248	247	8	10.59	.001
	Predictability	−1.61	.59	−2.74⁸	249	244	248	5	7.55	.006
	Length	−8.87	1.75	−5.07	248	248	240	16	25.75	.000

word n	Frequency	−3.91	.56	−7.02	254	250	241	47	48.94	.000
	Predictability	−4.42	.64	−6.93	252	241	231	45	47.84	.000
	Length	−8.36	1.62	−5.18	242	251	246	24	26.86	.000

word n+1	Frequency	.36	.53	.68	247	250	247	2	.46	.499
	predictability	−2.13	.60	−3.59³	248	247	247	11	13.00	.000
	Length	2.38	1.69	1.41	247	249	248	0	2.00	.157

character n−1	Frequency	−1.63	.56	−2.89	252	249	246	6	8.40	.004
character n−1	Complexity	−.08	.27	−.31	246	249	249	2	.089	.765

character n	Frequency	−.10	.67	−.15	259	250	244	2	.01	.909
character n	Complexity	1.43	.28	5.04	243	249	255	23	25.48	.000

character n+1	Frequency	.09	.53	.18	252	248	247	2	.02	.887
character n+1	Complexity	.13	.27	.48	247	248	249	2	.22	.638

character n+2	Frequency	1.47	.47	3.13	247	246	249	7	9.85	.002
character n+2	Complexity	.00	.26	.01	248	250	245	1	.55	.457

nearest fixation distance in word position		5.53	.51	10.78	247	252	237	95	95.33	.000
nearest fixation distance in word position		−5.68	1.38	−4.11	248	247	249	15	17.01	.000