TABLE 2.

Mean Coefficient of Variation of the Correlation Coefficient and the Lag for Each Articulator Pair and Probe^*

	Mean PCcov (SEM)			Mean Lcov (SEM)
	Pop	Puppet	Puppypop	Pop	Puppet	Puppypop
J–LL
CAS	0,33 (.13)	0.54 (.22)	0.54 (.22)	0.51 (.21)	0.48 (.20)	0.73 (.30)
SD	0.23 (.09)	0.21 (.08)	0.25 (.10)	0.31 (.13)	0.23 (.09)	0.35 (.14)
TD	0.46 (.19)	0.44 (.18)	0.36 (.15)	0.55 (.23)	0.57 (.23)	0.65 (.27)
J–UL				†‡
CAS	0.52 (.21)	0.51 (.21)	0.43 (.17)	0.52 (.21)	0.51 (.21)	0.43 (.17)
SD	0.41 (.17)	0.33 (.14)	0.31 (.12)	0.17 (.07)	0.05 (.02)	0.31 (.15)
TD	0.48 (.20)	0.58 (.23)	0.64 (.26)	0.28 (.17)	0.37 (.13)	0.56 (.23)
UL–LL
CAS	0.74 (.30)	0.54 (.22)	0.45 (.19)	0.67 (.28)	0.73 (.30)	0.3 (.12)
SD	0.35 (.14)	0.33 (.14)	0.39 (.16)	0.35 (.14)	0.4 (16)	0.4 (.16)
TD	0.5 (.20)	0.55 (.22)	0.45 (.18)	0.73 (.3)	0.57 (.23)	0.54 (.22)

^*Significant group differences relative to CAS are represented in bold (P < .05).

^†Significant length effect between pop and puppypop (P < .007).

^‡Significant length effect between puppet and puppypop (P < .004).

CAS = Childhood Apraxia of Speech; SD = speech disordered; TD = typically developing; Lcov = coefficient of variation of the lag; PCcov = coefficient of variation of the peak correlation coefficient; J–LL = jaw–lower lip; J–UL = jaw–upper lip; UL–LL = upper lip–lower lip; SEM = standard error of the mean.