== Questions about correlations ==

 1. [:FAQ/skew:How should I deal with outliers when doing correlations?]

 1. [:FAQ/rt1d:How do I correlate change in score with the score at baseline?]

 1. [:FAQ/constr:Can I do a correlation between two variables where one variable is less than or equal to the other?]

 1. [:FAQ/partsp:How do I produce nonparametric Spearman partial correlations using SPSS?]

 1. [:FAQ/Collinearity:What is Collinearity in multiple regression, and what do I do about it?]

 1. [:FAQ/WilliamsSPSS:How do I compare a pair of correlations?]

 1. [:FAQ/rdf:A note on estimating a correlation using multiple scores from a set of subjects]

 1. [:FAQ/avcor:How do I obtain an average correlation?]

 1. [:FAQ/corrs:How do I test if a correlation is zero?]

 1. [:FAQ/corrdf:How many degrees of freedom are associated with a test of whether a zero-order or multiple correlation equals zero?]

 1. [:FAQ/pvs:How do I adjust p-values to test if more than one correlation is zero?]

 1. [:FAQ/corrsCi:How do I obtain a 95% confidence interval for a correlation (or slope in a simple regression) in SPSS?] 

 1. [:FAQ/Power: Power calculations for testing if correlations equal zero] 

 1. [:FAQ/polychoric: What are polychoric correlations and how do I compute them and use in SPSS?]

 1. [:FAQ/icc: What are intraclass correlations and how do I use them?]

 1. [:FAQ/rest: A note on correcting for restriction of ranges which underestimate Pearson correlations]

 1. [:FAQ/RegCor:What is the relationship between significance tests of regression coefficients and of correlation coefficients?]