Unfortunately laboratory results were not retrievable from the GPs EMR database, which makes unequal comparison to diagnoses in STI-centers.
It is possible that this ordering, and seeing the titles and abstracts a second time, led to a selection bias and unequal comparison.
This null finding may reflect the unequal comparison made in this contrast (7 vs. 2 categories), but also some inhomogeneity between these 2 distant positive groups in the 2-dimensional Arousal/Valence space (see Fig. 2), and/or a true dissimilarity between emotions in the A+V+ versus A-V+ groups.
For instance, if you are a 13 year old athlete comparing yourself to your 21 year old cousin, that's an unequal comparison.
A Welch modified t-test was applied for this unequal variances comparison.
For example, a 1999 Institute of Medicine study concluded that National Institutes of Health funding for cancer research targeting minority and medically underserved populations (which will include many at-risk children) was both inadequate and unequal in comparison to research targeting nonminority populations (Haynes and Smedley 1999).
Unless stated otherwise, statistical significance was determined using an unpaired, two-tailed Student's ttest, assuming unequal variances (single comparisons); or a one-way ANOVA followed by the Tukey post-hoc test (multiple comparisons).
Other behavior tests and biochemical data were analyzed with one-way ANOVA followed by the SNK, least-significant difference (for equal variances) or Dunnett's T3 (unequal variances) multiple comparisons.
Using comprehensive simulations, possible sources of bias in networks similar to this one (eg, the effect of unequal studies per comparison) will be assessed.
Data were analysed using one-way ANOVA and the paired Student's t-test of unequal variance for comparison between groups.
Two sample-comparisons were carried out using the unpaired Student's t test with unequal variance, while multiple comparisons were made by one-way ANOVA followed by the Newman-Keuls multiple range test.
