. Author manuscript; available in PMC: 2014 Apr 11.

Published in final edited form as: J Speech Lang Hear Res. 2009 Aug 28;52(6):1530–1554. doi: 10.1044/1092-4388(2009/08-0020)

Table 6.

Planned comparisons using a Mann–Whitney rank sum test to compare between behaviors for differences in complexity of jaw movement.

Comparison	Spectral energy description	T	p
Jaw Oscillation × Chewing		9,035	.200
Multisyllabic Age Group 1 Comparisons
Jaw Oscillation × Multisyllabic 1		942.5	.909
Jaw Oscillation × Multisyllabic 2	Nonspeech behaviors often had 1 peak of energy	1,502.5	.122
Jaw Oscillation < Multisyllabic 3		356	.001^a
Chewing × Multisyllabic 1		12,914.5	.107
Chewing < Multisyllabic 2		39,580.5	< .001^a
Chewing < Multisyllabic 3	Multisyllables had more samples of 2 or more peaks of energy	5,941	< .001^a
Multisyllabic Age Group 2 Comparisons
Jaw Oscillation × Multisyllabic 2		2,403	.876
Jaw Oscillation × Multisyllabic 3		1,312.5	.249
Chewing × Multisyllabic 2		52,239	.025
Chewing < Multisyllabic 3		29,370.5	< .001^a

Note. α = .05.

Statistically significant.