Table 2.
Descriptive statistics of behavioural outcome measures.
| Variable name | N | Mean | SD | SE | Range | Skew | Kurtosis |
|---|---|---|---|---|---|---|---|
| SPELT-3 standard score | 132 | 113.13 | 6.66 | 0.58 | 90–126 | − 0.78 | 1.06 |
| SPELT-3 raw score | 132 | 46.06 | 3.80 | 0.33 | 35–53 | − 0.77 | 0.22 |
| SPELT-3 complex syntax sub-score | 132 | 0.79 | 0.13 | 0.01 | 0.42–1 | − 0.63 | − 0.004 |
| BBA d' | 121 | 0.99 | 0.85 | 0.08 | − 1.20–2.73 | 0.12 | − 0.64 |
| Prosody Matching d' | 118 | 1.79 | 0.78 | 0.07 | 0.13–3.28 | − 0.40 | − 0.39 |
| KABC-II number recall raw score | 132 | 9.36 | 2.02 | 0.18 | 5–16 | 0.06 | 0.37 |
Age-normed standard scores and raw test scores for the expressive language test (SPELT-3) are shown. The complex syntax sub-score is a non-scaled raw score. The d' dcalculated using signal detection is reported for the BBA and Prosody Matching tests. The non-scaled raw score of the forward digit span subtest of the KABC-II is used. SPELT-3 = Structured Photographic Expressive Language Test-3; BBA = Beat-Based Advantage; KABC = Kaufman Assessment Battery for Children.