TABLE 3.

Descriptive statistics of utterance fluency indicators.

		SR	PTR	MLR	SP mean	DF mean
Low input rate
Pretraining	Mean	2.821	0.608	7.368	22.992	1.500
	SD	0.379	0.094	0.959	2.373	1.506
	Range	1.400	0.340	3.810	9.070	7.950
Posttraining	Mean	2.923	0.609	7.553	23.228	2.367
	SD	0.395	0.078	1.010	2.289	1.947
	Range	1.730	0.280	4.280	9.850	8.990
Utterance fluency development	Mean	0.102	0.001	0.185	0.236	0.868
	SD	0.263	0.054	0.767	2.030	1.165
	Range	0.880	0.210	2.920	7.260	6.600
High input rate
Pretraining	Mean	2.968	0.610	7.908	22.560	3.049
	SD	0.424	0.092	1.139	2.551	2.718
	Range	1.630	0.350	5.000	10.590	14.600
Posttraining	Mean	3.060	0.614	8.103	22.695	2.371
	SD	0.385	0.088	1.061	2.444	2.390
	Range	1.680	0.290	4.580	10.470	12.770
Utterance fluency development	Mean	0.093	0.004	0.194	0.135	−0.679
	SD	0.231	0.054	0.898	2.201	1.146
	Range	1.100	0.230	4.120	9.490	4.680

SR, speech rate (per second); PTR, phonation time ratio; MLR, mean length of run; SP mean, mean number of silent pauses per minute; DF mean, mean number of disfluencies (filled pauses, repairs, repetitions, and false starts) per minute.