Table 1: Participants communication skills characteristics.
| Participants | Erin | Jacob |
| 1Possibility of ASD | 89 (very likely) | 100 (very likely) |
| Prelinguistic skills | Gestures, vocalizations, word approximations (e.g., pa, by) | Gestures, vocalizations, word approximations (e.g., bye, hi) |
| 2VP-MAPP | ||
| Milestone | Level 1 | Level 1 |
| Barrier | 3 (Weak) | 4 (Absent) |
| 3ABAS-2 | ||
| Communication domain | Extremely low | Extremely low |
Note: 1Autism Index (AI) score on Gilliam Autism Rating Scale-Third Edition (GARS-3 [29]); 2Verbal Behavior-Milestones Assessment and Placement Program (VB-MAPP [28]);
3Adaptive Behavior Assessment System-Second edition (ABAS-2 [30]).