Table 3. Means, Standard Deviations, Ranges, and Missing Data Points for Time 1 (T1) Predictors.
| T1 measures | M | SD | Range | Maximum score | Missing data points |
|---|---|---|---|---|---|
| Note. ToM = Theory of Mind. | |||||
| Social cognition | |||||
| ToM Precursors (including Knowledge Access) | 2.52 | 0.79 | 0–3 | 3 | 22 of 45 (49%) |
| ToM Precursors (without Knowledge Access) | 1.56 | 0.62 | 0–2 | 2 | 0 |
| False Belief | 2.00 | 1.49 | 0–4 | 5 | 17 of 225 (8%) |
| Executive functioning and memory | |||||
| Short-Term Memory | 7.47 | 3.42 | 0–15 | 36 | 0 |
| Working Memory | 3.27 | 1.32 | 1–6 | 6 | 0 |
| Cognitive Flexibility | 1.88 | 2.57 | 0–6 | 6 | 3 of 45 (7%) |
| Motoric Inhibitory Control | 4.00 | 1.60 | 0–5 | 5 | 11 of 45 (24%) |
| Verbal Inhibitory Control | 8.77 | 5.64 | 0–21 | 21 | 1 of 45 (2%) |
| General language | |||||
| Receptive Vocabulary | 42.76 | 14.12 | 17–77 | 120 | 0 |
| Receptive Grammar | 9.58 | 4.48 | 1–18 | 22 | 0 |
| Perspective-marking language | |||||
| Complement-Clause Proficiency | 9.45 | 6.60 | 1–26 | 32 | 1 of 45 (2%) |
| Mental Verbs: 1st person | 0.47 | 0.66 | 0–2 | 2 | 0 |
| Mental Verbs: 3rd person | 0.47 | 0.73 | 0–2 | 2 | 0 |
| Epistemic Modals | 0.40 | 0.58 | 0–2 | 2 | 0 |