Table 4.

Correlations between severity, intelligibility, and childhood apraxia of speech (CAS) signs.

CAS sign	Mean clinician severity	Mean student severity	Overall mean severity	Overall mean intelligibility
Consonant error	.877*	.846*	.867*	−.860*
Voicing error	.051	−.008	.027	−.095
Nasality error	.539*	.498*	.525*	−.597*
Vowel error	.543*	.544*	.546*	−.555*
Intrusive schwa	.301	.283	.297	−.344
Syllable segmentation	.707*	.694*	.706*	−.687*
Stress error	.611*	.540*	.585*	−.662*
Slow rate	.667*	.639*	.659*	−.661
Difficulty with transitions	−.012	−.064	−.034	.036
Groping	−.318	−.374*	−.343	.282
Variable errors	.087	.097	.093	−.118
Addition error	.595*	.608*	.604*	−.620*

^* p < .05.