Exact(6)
Due to a possible weak relationship between subject age and STX1A expression, we performed a partial correlation between STX1A and PC1 after removing variance added by subject age.
A potential disadvantage of this approach may be the loss of information by removing variance that is specific to each of the endophenotypes.
Additionally, the second block including the psychosocial variables was also significant, χ = 32.61, p = .01, df = 17, indicating that after removing variance associated with type of school, the combination of psychosocial factors significantly predicted sexual initiation status.
However, analysis of the second block in this model indicated that after removing variance associated with ethnicity and type of school, the combination of psychosocial factors did not significantly predict sexual initiation status, χ = 21.57, p = .20, df = 17.
In this context, longitudinal designs are more powerful than cross-sectional studies, as each subject is effectively acts as their own control, removing variance due to baseline differences (typically large compared to changes seen over time).
As predicted, the sustained outward current activated at perithreshold voltages (−50 mV to −30 mV) and blocked by 10 nM dendrotoxin was significantly smaller in muscle afferents than in cutaneous afferents (p<0.01; two-way ANOVA and post-hoc Student-Newman-Keuls test; 1.7 ± 0.6 pA/pF in muscle afferents vs 4.2 ± 0.6 pA/pF in cutaneous afferents after removing variance attributable to voltage).
Similar(54)
Let us note that all investigated artifact removal methods remove variance from the signals and thus reduce the power in all frequencies.
In analyses which removed variance shared with IQ, we found that receptive vocabulary knowledge was the only significant predictor of comprehension performance in our task out of a battery of 24 skill measures.
We did not attempt a weighting scheme in the recovery procedure as the log transformation of AGB and DBH in most cases remove variance heteroscedasticity in the original scale of the residuals.
Regional GM concentration was compared using a two sample t-tests, while controlling for global GM mean voxel values to remove variance due to differences in brain tissue size.
Therefore, including these measures as covariates may have removed variance explained by problematic Internet game-playing or IGD severity.
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