Table 4.

Multilevel linear model results regarding the age effect on 2D:4D

Measurement	Estimate	SE	df	t	p
T1 vs. T2	− 0.02	0.04	437.6	0.56	.579
T2 vs. T3	0.03	0.04	379.7	0.56	.574
T3 vs. T4	0.16	0.04	375.8	3.88	< .001

SE standard error

Estimates represent standardized regression weights. Analyses were performed with the R procedures lme4 and lmerTest with restricted maximum likelihood estimation. For sex, 0 = boys, 1 = girls. For hand, 0 = left, 1 = right. For age, T1 = 5 months (4.6–6.9 months), T2 = 9 months (7.6–10.3 months), T3 = 20 months (18.6–21.7 months), T4 = 40 months (38.3–42.6 months)