Table 2.
Descriptive Statistics for Predictor and Outcome Variables
| N | M | SD | |
|---|---|---|---|
| Habituation (s) | 552 | 39.61 | 40.15 |
| Griffiths Mental Development Scales General Developmental Quotienta | 429 | 108.70 | 8.30 |
| Wechsler Intelligence Scale for ChildrenUK Full Scale Intelligence Quotientb | 352 | 104.03 | 16.38 |
| Key Stage 3 Englishc | 391 | 46.95 | 16.29 |
| Key Stage 3 Mathematicsd | 399 | 84.01 | 21.83 |
| Key Stage 3 Sciencee | 404 | 100.93 | 24.33 |
| Infant Temperament Questionnairef | 511 | 0.00 | 0.90 |
| Strengths and Difficulties Questionnaireg | 285 | 5.90 | 5.84 |
| Mother Parenting Scoreh | 523 | 10.49 | 1.50 |
| HOME Scalei | 524 | 8.37 | 2.10 |
Note. Untransformed data. Analyses were conducted on transformed data.
a
The GQ has M = 100.1, SD = 12.8 (Griffiths, 1984).
b
The standard score has M = 100, SD = 15.
c
Total score range: 0 – 100.
d
Total score range: 0 – 150.
e
Total score range: 0 – 180.
f
Principal axis factoring score.
g
Total difficulties score range: 0 – 40.
h
Total score range: 0 – 14.
i
Total score range: 0 – 12.