. 2017 Dec 20;60(12):3378–3392. doi: 10.1044/2017_JSLHR-S-16-0443

Table 2.

Spearman correlation coefficients between all variables and ASRS AOS severity scores (quantified on a 0–4 scale).

Predictor	Correlation coefficient
Proportion distortions	r _s = .79, p < .001^*
nPVI-V	r _s = −.70, p < .001^*
VOT-SD_voiced	r _s = .35, p = .01
VOT-SD_voiceless	r _s = −.28, p = .04
1 Hz–2 Hz band	r _s = .59, p < .001^*
4 Hz–8 Hz band	r _s = −.46, p < .001^*
16 Hz–32 Hz band	r _s = .59, p < .001^*

Note. ASRS = Apraxia of Speech Rating Scale; AOS = Apraxia of Speech; nPVI-V = normalized Pairwise Variability Index–Vowels; VOT-SD = standard deviation of voice onset time.

Correlations significant at the Bonferroni-corrected p = .007 (p = .05/7 comparisons).