Table 3.

Pairwise Pearson correlations between child age and laughter and smile totals per condition.

	Laughs groups	Laughs pairs	Laughs indiv	Smiles groups	Smiles pairs	Smiles indiv
Age months	0.163 (0.492)	−0.010 (0.968)	−0.206 (0.385)	0.088 (0.713)	0.300 (0.198)	0.063 (0.791)
Laughs groups		0.431 (0.058)	0.268 (0.253)	0.586∗∗ (0.007)	0.615∗ (0.004)	0.007 (0.977)
Laughs pairs			0.347 (0.133)	0.361 (0.118)	0.529∗ (0.016)	−0.108 (0.651)
Laughs indiv				0.145 (0.541)	−0.098 (0.681)	0.021 (0.929)
Smiles groups					0.733∗∗∗ (<0.001)	0.353 (0.127)
Smiles pairs						0.140 (0.556)

^∗p < 0.05,^∗∗p < 0.01,^∗∗∗p < 0.001. p-values are shown in brackets with significant correlations shown in bold.