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. Author manuscript; available in PMC: 2022 Sep 1.

Published in final edited form as: Dev Psychol. 2021 Sep;57(9):1471–1486. doi: 10.1037/dev0001235

Table 3.

Multilevel Model Selection Procedures

	Self-Soothing			Bidding			Distraction

	Intercept	+Linear	+Quadratic	Intercept	+Linear	+Quadratic	Intercept	+Linear	+Quadratic
Frequency
AIC	2092.572	2035.273	1997.083	2934.475	2900.460	2895.963	2522.835	2456.977	2446.718
BIC	2104.839	2042.063	2042.063	2946.742	2929.083	2940.942	2535.102	2485.601	2491.697
Log Likelihood	−1043.286	−1010.637	−987.542	−1467.237	−1443.230	−1436.981	−1258.417	−1221.489	−1212.359
χ² from previous	--	65.298^*	46.190 ^*	--	42.015^*	12.497 ^*	--	73.858^*	18.259 ^*
Average Duration
AIC	4129.917	4068.672	4004.405	1527.252	1520.478	1510.295	3671.771	3662.966	3652.886
BIC	4142.177	4097.279	4049.360	1539.519	1549.101	1555.274	3684.038	3687.500	3697.866
Log Likelihood	−2061.958	−2027.336	−1991.203	−760.626	−753.234	−744.147	−1832.886	−1825.483	−1815.443
χ² from previous	--	69.245^*	72.266 ^*	--	14.774^*	18.183 ^*	--	14.805^*	20.079 ^*
Dominance
AIC	−213.268	−287.500	−366.544	−228.524	−222.666	−264.548	−11.546	−48.638	−60.310
BIC	−201.008	−258.893	−321.590	−216.257	−198.132	−219.568	.721	−20.015	−15.331
Log Likelihood	109.634	150.750	194.272	117.262	117.333	143.274	8.773	31.319	41.155
χ² from previous	--	82.232^*	87.044 ^*	--	.142	51.882 ^*	--	45.092^*	19.672 ^*

Note:

^*

p < .05;

Bolded models were selected based on improved model fit from previous model.