Table 2.

Summary of ASRS interjudge reliability and frequency of abnormal features.

Item	Feature	Interjudge reliability a	Frequency of feature abnormality (rating ≥ 1) b
			AOS only (n = 42)	Aphasia only (n = 100)	Dysarthria only (n = 65)
1	Distortions	Good–excellent	88%	18%	78% c
2	Distorted substitutions	Moderate–good	76%	28%	3%
3	Distorted additions	Moderate–excellent	45%	3%	0%
4	Increased errors with length/complexity	Good–excellent	90%	27%	14%
5	Segmentation within words	Good–excellent	81%	4%	5%c
6	Segmentation across words	Good–excellent	86%	2%	8%c
7	Slow rate	Good–excellent	90%	2%	42% c
8	Lengthened segments	Poor–good	67%	8%	5%c
9	AMRs	Moderate–excellent	52%	12%	52% c
10	SMRs	Excellent	93%	27% c	26% c
11	Reduced words or AMRs per breath	Good–excellent	34%	0%	2%
12	Visible/silent groping	Moderate–excellent	26%	5%c	0%
13	Audible false starts/restarts	Good–excellent	69%	51% c	17%c

Note. See Appendix for complete item labels. ASRS = Apraxia of Speech Rating Scale; AOS = apraxia of speech; AMRs = alternating motion rates; SMRs = sequential motion rates.

^a Descriptors as suggested by Koo and Li (2016), based on ICC 95% confidence intervals (see Figure 1).

^b Features occurring in > 50% of participants are in bold; those occurring in 20%–50% of participants are in italics.

^c Considered a priori as an overlap feature with AOS.