Table 3.
Descriptive statistics and correlations between maternal and infant vocal contingencies
| Contingencies |
||||||
|---|---|---|---|---|---|---|
| Maternal vocal responsiveness |
Infant vocal responsiveness |
|||||
| n | M | SD | M | SD | r | |
| Argentina | 97 | 1.52ab | .74 | 1.18 | .51 | .35*** |
| Belgium | 99 | 1.22acd | .43 | 1.07 | .51 | .46*** |
| Brazil | 58 | 1.33abcd | .53 | 1.13 | .49 | .37**a |
| Cameroon | 29 | 1.46abcd | .91 | 1.26 | .69 | .55*** |
| France | 49 | 1.24abcd | .39 | 1.12 | .43 | .74*** |
| Israel | 30 | 1.38abcd | .46 | 1.06 | .38 | .62*** |
| Italy | 92 | 1.47ab | .56 | 1.19 | .39 | .55*** |
| Japan | 49 | 1.45abd | .61 | 1.19 | .40 | .42** |
| Kenya | 19 | 1.24c | .86 | 1.42 | .61 | .21 |
| South Korea | 51 | 1.12cd | .31 | 1.23 | .45 | .27* |
| United States | 100 | 1.51b | .66 | 1.14 | .44 | .40*** |
| Total | 673 | 1.38 | .59 | 1.16 | .47 | .42*** |
Note. Descriptive statistics are based on untransformed variables, but statistical tests were performed on transformed variables. Community means that do not share subscripts withincolumns differed significantly (p < .025) in Bonferroni post-hoc tests. There was no significant effect of community for IVR. Correlations are one-tailed.
*
p < .05.
**
p < .01.
***
p < .001.
a
n = 57, excluding one influential outlier.