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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

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

Variant Digit ratio Limb left SD right SD T–test Hedges’ g
t df P value category
I 2D:3Da 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
  1. a 2D:3D in variant I corresponds to 3D:4D in variant II – for additional information, see Fig. 1; n/a Not applicable