Table 6. Associations of NSES and other IT exposure: Correlation and 3 step prediction model statistics.
| Outcome variables other IT types | Spearman’s rho correlation | Individual R squared change (Step 1) | Family R squared change (Step 2) | NSES R squared change Step 3) | Overall model R squared | Overall model F and p |
|---|---|---|---|---|---|---|
| Reading | ||||||
| Monthly frequency | .130** | .111** | .010* | .009* | .130** | 15.09, <.001 |
| Usual duration | .072** | .027** | .008* | .004* | .038** | 4.01, <.001 |
| Longest duration | .087** | .035** | .009* | .004* | .048** | 5.13, <.001 |
| Writing | ||||||
| Monthly frequency | .011 | .033** | .008* | .000 | .033** | 4.33, <.001 |
| Usual duration | -.048 | .036** | .002 | .001 | .040** | 4.12, <.001 |
| Longest duration | .007 | .024** | .002 | .000 | .026* | 2.70, =.002 |
| Electronic game | ||||||
| Monthly frequency | -.060* | .200** | .000 | .006* | .454** | 26.20, <.001 |
| Usual duration | -.100** | .156** | .003 | .007* | .167** | 14.10, <.001 |
| Longest duration | -.069* | .176** | .001 | .003 | .180** | 15.46, <.001 |
| TV/ DVD | ||||||
| Monthly frequency | -.092** | .004 | .001 | .004* | .008 | .852, =.588 |
| Usual duration | -.126** | .053** | .001 | .007* | .062** | 6.66, <.001 |
| Longest duration | -.026 | .064** | .004 | .000 | .068** | 7.30, <.001 |
| Mobile phone | ||||||
| Monthly frequency | -.127** | .404** | .003 | .005* | .412** | 70.64, <.001 |
| Duration | -.144** | .254** | .005* | .009** | .268** | 36.85, <.001 |
| Longest duration | -.152** | .199** | .007* | .014** | .221** | 28.52, <.001 |
Note.
* = p <.05,
** = p <.001. NSES = neighbourhood socioeconomic status.
IT = information technology.