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Various R-scripts

2×2 repeated measures ANOVA

2×2 repeated measures ANOVA R-script rm_2by2_anova.r outputs assumption checks (outliers and normality), interaction and main effect results, pairwise comparisons, and produces a result plot with within-subject error bars (SD, SE or 95% CI) and significance stars added to the plot.

Flexible correlation

Flexible correlations R-script flexible_correlations.r first inspects the data for outliers and normality and then chooses the most appropriate from three correlation methods. Based on Pernet et al. (2013), I follow three simple rules for selecting the correlation method:

  • Pearson's correlation: Data is normally distributed and has no outliers
  • Spearman skipped correlation: Data has bi-variate outliers
    • Using the minimum covariance determinant (MCD) estimator
  • (20%) Percentage-bend correlation: Data has no bi-variate outliers but is not normally distributed or has univariate outliers