| No | Diagnostic criteria |
|---|---|
| ① | Inconsistent productions |
| ② | Increasing difficulty with increased length of utterance |
| ③ | Poor sequencing of sounds |
| ④ | Inappropriate prosody |
| ⑤ | Groping |
| ⑥ | Frequent vowel errors |
| ⑦ | Limited phonetic inventory |
| ⑧ | Unable to imitate sounds |
| ⑨ | Expressive language worse than receptive |
| ⑩ | Frequent sound omissions |
| ⑪ | Difficulty in voluntary speech movement |
| ⑫ | Reduced intelligibility |