Table 2.
Correlation matrix for the full sample.
| Full sample, N = 84 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Variable | 1. | 2. | 3. | 4. | 5. | 6. | 7. | 8. |
| 1. RMSSD M-I | 1 | |||||||
| 2. RMSSD F-I | 0.734** | 1 | ||||||
| 3. Synchrony M-I | 0.353** | 0.246* | 1 | |||||
| 4. Synchrony F-I | 0.311** | 0.164 | 0.524** | 1 | ||||
| 5. I sex | −0.054 | −0.033 | −0.111 | −0.165 | 1 | |||
| 6. M age | −0.099 | −0.119 | −0.122 | −0.175 | −0.144 | 1 | ||
| 7. F age | 0.067 | 0.053 | −0.123 | −0.156 | −0.017 | 0.537** | 1 | |
| 8. SES | 0.123 | 0.122 | 0.077 | −0.075 | 0.061 | 0.276* | 0.278* | 1 |
** p < 0.01; * p < 0.05; RMSSD, root mean square of successive differences; M, mother; F, father; I, infant; Sex: 1 = female, 2 = male; SES, socio-economic status: 1 = lower, 2 = lower-middle, 3 = middle, 4 = middle-upper, 5 = upper.