T-tests were used to deterniine if there were any differences between the groups in age, body mass, or height. The main dependent measurements (neck flexion ROM and the 6 posture variables) were examined for homogeneity of variance and normality.
A 3-factor mixed model analysis of variance (ANOVA) was used to test between trial, between group, between pre-test/post-test, and all two and three-way interactions for neck fiexion range of motion. A 2-factor mixed-model ANOVA was used to test between group, and between pre-test/post-test, and a group by time interaction for the posture measurements {a = 0.05). Scores on the physical activity questionnaires were compared between groups for pre- and post-study differences, using a 2-factor ANOVA. Appropriate post hoc tests were conducted on significant main effects or interactions using the Bonferroni method.Statistical analyses were performed using Minitab version 13.
T-tests were used to deterniine if there were any differences between the groups in age, body mass, or height. The main dependent measurements (neck flexion ROM and the 6 posture variables) were examined for homogeneity of variance and normality. A 3-factor mixed model analysis of variance (ANOVA) was used to test between trial, between group, between pre-test/post-test, and all two and three-way interactions for neck fiexion range of motion. A 2-factor mixed-model ANOVA was used to test between group, and between pre-test/post-test, and a group by time interaction for the posture measurements {a = 0.05). Scores on the physical activity questionnaires were compared between groups for pre- and post-study differences, using a 2-factor ANOVA. Appropriate post hoc tests were conducted on significant main effects or interactions using the Bonferroni method.Statistical analyses were performed using Minitab version 13.
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