Table 2.

Pearson correlations between measures of externalizing behavior and digit ratios of both hands, separately for males and females

	Boys and Girls (N = 219)		Boys (N =120)		Girls (N= 99)
	r	p	r	p	r	p
Left hand 2D:4D
Mothers’ reports
Attention	−.221	.001	−.292	.001	−.141	.165
Aggression	−.124	.066	−.151	.099	−.096	.344
Externalizing	−.169	.012	−.218	.017	−.123	.226
Teachers’ reports
Attention	−.063	.350	−.143	.120	.056	.581
Aggression	−.155	.021	−.195	.033	−.108	.289
Externalizing	−.123	.069	−.178	.052	−.052	.608
Averaged mothers’ and teachers’ reports
Attention	−.173	.010	−.258	.004	−.074	.468
Aggression	−.142	.036	−.203	.027	−.085	.402
Externalizing	−.170	.012	−.241	.008	−.098	.332
Right hand 2D:4D
Mothers’ reports
Attention	−.076	.265	−.096	.299	−.059	.562
Aggression	−.036	.594	−.122	.186	.071	.486
Externalizing	−.053	.438	−.123	.181	.028	.786
Teachers’ reports
Attention	−.049	.474	−.110	.231	.037	.719
Aggression	−.030	.660	−.077	.401	.030	.765
Externalizing	−.030	.659	−.081	.378	.028	.783
Averaged mothers’ and teachers’ reports
Attention	−.081	.234	−.143	.120	−.010	.919
Aggression	−.022	.746	−.126	.169	.098	.335
Externalizing	−.041	.550	−.142	.121	.073	.475

Note: Significant p values are printed in bold. 2D:4D, ratio of the length of the second finger digit relative to the fourth digit