Table 2.
Effect of VIP and BB on Parent-Child Interaction at 6 Months: Mean (SD) StimQ and Reading Diary Scores
| Score | Group, No. (%)
|
F | P Valuea | VIP vs Control
|
BB vs Control
|
||||
|---|---|---|---|---|---|---|---|---|---|
| VIP (n=126) | BB (n=150) | Control (n=134) | Mean Difference (95% CI) | ES | Mean Difference (95% CI) | ES | |||
| Assessment | |||||||||
| StimQ total | 19.9 (7.0)b | 18.6 (6.8) | 16.4 (7.0)b | 8.70 | <.001 | 3.6 (1.5 to 5.6) | 0.51 (0.22 to 0.81) | 2.2 (0.2 to 4.1) | 0.31 (0.03 to 0.60) |
| ALM | 2.8 (1.1)b | 2.6 (1.2) | 2.3 (1.2)b | 7.00 | .001 | 0.5 (0.2 to 0.9) | 0.46 (0.16 to 0.75) | 0.3 (0.01 to 0.7) | 0.30 (0.02 to 0.58) |
| READ | 8.0 (4.2)b | 8.2 (3.7) | 6.8 (4.4)b | 4.83 | .008 | 1.3 (0.1 to 2.5) | 0.31 (0.02 to 0.60) | 1.4 (0.3 to 2.6) | 0.34 (0.06 to 0.62) |
| PIDA | 3.3 (1.6)b | 2.8 (1.7)b | 2.5 (1.5) | 8.18 | <.001 | 0.8 (0.3 to 1.3) | 0.49 (0.20 to 0.79) | 0.2 (−0.2 to 0.7) | 0.15 (−0.14 to 0.43) |
| PVR | 5.7 (2.6)b | 5.1 (2.5) | 4.8 (2.3)b | 4.93 | .01 | 1.0 (0.2 to 1.7) | 0.38 (0.08 to 0.67) | 0.3 (−0.5 to 1.0) | 0.10 (−0.19 to 0.38) |
|
| |||||||||
| Reading Diary | |||||||||
| Time spent reading, min/d | 18.3 (25.6)b | 15.3 (20.7) | 10.8 (16.3)b | 4.07 | .02 | 7.4 (1.2 to 13.6) | 0.35 (0.06 to 0.65) | 4.4 (−1.5 to 10.4) | 0.21 (−0.07 to 0.49) |
| Reading, instances/d | 1.1 (1.3)b | 1.0 (1.0) | 0.6 (0.7)b | 7.16 | .001 | 0.5 (0.2 to 0.8) | 0.45 (0.16 to 0.74) | 0.4 (0.1 to 0.6) | 0.33 (0.05 to 0.61) |
Abbreviations: ALM, Availability of Learning Materials; BB, Building Blocks; CI, confidence interval; ES, effect size; PIDA, Parental Involvement in Developmental Advancement; PVR, Parental Verbal Responsivity; READ, Reading Activities; VIP, Video Interaction Project.
a
Omnibus P value based on F test for analysis of variance.
b
Letter denotes groups differing at P<.05 on post hoc testing by Tukey honestly significantly different test.