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. Author manuscript; available in PMC: 2017 Jul 24.
Published in final edited form as: Int J Lang Commun Disord. 2014 Dec 31;50(3):337–346. doi: 10.1111/1460-6984.12136

Table 2.

Means and standard deviations for the number of error types out of a possible 384 target phonemes

Children with SLI
Children with TLD
Error type M SD Range M SD Range
Addition 7.67 6.04 0–26 4.22 3.02 0–9
Deletion 43.72 43.51 6–162 7.39 4.90 1–19
Substitution 116.67 32.30 34–160 78.06 26.03 27–148
Consonant 52.06 19.46 15–87 33.34 14.05 11–61
Vowel 64.61 16.31 19–82 44.72 13.73 16–87
Total 168.06 40.31 108–250 89.67 30.15 36–166