Table 2.

ANOVA results and severity correlations for variability (standard deviation, SD) in onset time and peak time (opposing responses only).

	Effect of Group	Severity Correlation	Effect of Direction	Group x Direction
Onset Time Variability (SD)	F(1,26) = 3.6, p = 0.071~	r2 = 0.31 , p = 0.047*	F(1,26) = 15.4, p = 0.002*	F(1,26) = 0.2, p = 0.670
Peak Time Variability (SD)	F(1,26) = 4.1, p = 0.054~	r2 = 0.51 , p = 0.006*	F(1,26) = 1.7, p = 0.202	F(1,26) = 0.8, p = 0.385

Variability in onset time: There was a trend for AS as a group to be more variable than AC in the onset time of their response, corroborated by a significant correlation between onset time variability and stuttering severity. Up-shift trials also led to onset responses that were more variable in time than down-shift trials. Variability in peak time: There was a trend for AS as a group to be more variable than AC in the peak time of their response, corroborated by a significant correlation between peak time variability and stuttering severity.