Finally, lateralization index in primary sensorimotor cortex and basal ganglia was significantly affected by the main effect of dominance, whereas the lateralization index in cerebellum was significantly affected by the joint main effect, demonstrating a lateralization index increase from proximal to distal joints.
Specifically, a simple main effects analysis demonstrated that frail older adults with a low level of psychosocial adjustment were different in terms of ADL from frail individuals with moderate (P<0.001) and good (P=0.008) psychosocial scores.
However, tests of between-subjects effects demonstrated a main effect of music, F 3, 60) = 15.88, p < 0.001, η2 = 0.209, with faster performance among musicians (mean = 480, SEM = 11.7) than non-musicians (mean = 545, SEM = 11.1).
However, tests of between-subjects effects demonstrated a marginal main effect of music, F 2, 90) = 2.62, p = 0.079, η2 = 0.055, with faster performance among high-practicing musicians (mean = 498.5, SEM = 14.3) than low-practicing musicians (mean = 508.1, SEM = 13.5) or non-musicians (mean = 535.0, SEM = 10.1).
Finally, tests of main effect interactions demonstrated no statistical significance in AIDS events or death when treatment assignment, length of follow-up, or calendar time of enrollment were considered (Tables 3, 4, 5, 6).
When considering developmental treatment, a main effect would demonstrate that developmental treatment altered the average level of that flight performance measure, whereas an interaction between developmental treatment and another component of flight performance would suggest that developmental treatment altered trade-offs between flight performance components.
The ANOVA on the reaction times demonstrated main effects of condition, F 1, 9) = 132, p <.001, and target presence, F 1, 9) = 37, p <.001.
As predicted, the main effect of group demonstrated greater activation in deaf than hearing participants in the middle and posterior portions of the superior and middle temporal gyri.
The rule of thumb for such efforts is that a factor-of-four sample size is needed, compared with that needed to demonstrate main effects of either genes or exposures.
