1	AOS - primary distinguishing featuresa (no overlap with dysarthria or aphasia). One or more must be present for diagnosis of AOS.	Score (0–4)
1.1	Distorted sound substitutions
1.2	Distorted sound additions (not including intrusive schwa)
1.3	Increased sound distortions or distorted sound substitutions with increased utterance length or increased syllable/word articulatory complexity
1.4	Increased sound distortions or distorted sound substitutions with increased speech rate
1.5	Inaccurate (off-target in place or manner) speech AMR’s (alternating motion rates, as in rapid repetition of “puhpuhpuh”)
1.6	Reduced words per breath group relative to maximum vowel duration
2	Distinguishing features unless dysarthria presentb	Score (0–4)
2.1	Syllable segmentation within words > 1 syllable
2.2	Syllable segmentation across words in phrases/sentences
2.3	Sound distortions
2.4	Slow overall speech rate
2.5	Lengthened vowel &/or consonant segments
2.6	Lengthened intersegment durations (between sounds, syllables, words, or phrases; possibly filled, including intrusive schwa)
3	Distinguishing features unless aphasia presentc	Score (0–4)
3.1	Deliberate, slowly sequenced, segmented,&/or distorted (including distorted substitutions) speech SMRs in comparison to speech AMRs
3.2	Audible or visible articulatory groping; speech initiation difficulty; false starts/restarts
4	Distinguishing features unless dysarthria &/or aphasia presentd	Score (0–4)
4.1	Sound or syllable repetitions
4.2	Sound prolongations (beyond lengthened segments)