Digit ratio in the common toad Bufo bufo: the effects of reduced fingers and of age dependency

Zoological Letters

Table 3 Summary of t-tests for dependent variables comparing each digit ratio (2D:3D, 2D:4D, and 3D:4D) on the forelimbs and hindlimbs between the right and left body sides, according to both digit numbering protocols for the forelimbs (variants I and II), in the common toad Bufo bufo. The last two columns present estimated absolute values of the effect size according to Hedges’ g statistics with magnitude categories

Variant	Digit ratio	Limb	left	SD	right	SD	T–test			Hedges’ g
Variant	Digit ratio	Limb	left	SD	right	SD	t	df	P	value	category
I	2D:3D^a	Fore	0.689	0.068	0.695	0.071	1.078	290	0.282	0.081	negligible
II	2D:3D	Fore	1.230	0.144	1.189	0.150	3.515	295	*0.001*	0.281	small
I	2D:4D	Fore	1.030	0.141	1.084	0.180	4.320	294	*< 0.001*	0.335	small
II	2D:4D	Fore	0.844	0.098	0.821	0.102	2.922	290	*0.004*	0.225	small
I	3D:4D	Fore	1.497	0.181	1.563	0.228	−4.157	290	*< 0.001*	0.321	small
n/a	2D:3D	Hind	0.700	0.062	0.689	0.070	2.216	295	*0.027*	0.174	negligible
n/a	2D:4D	Hind	0.415	0.039	0.414	0.053	0.291	293	0.771	0.023	negligible
n/a	3D:4D	Hind	0.594	0.050	0.601	0.058	−1.830	296	0.068	0.141	negligible

^a 2D:3D in variant I corresponds to 3D:4D in variant II – for additional information, see Fig. 1; n/a Not applicable

ISSN: 2056-306X