## How do I obtain 95% Confidence Intervals for a (Pearson) correlation in SPSS?

Weaver and Koopman (2014) use SPSS macros available from here to obtain confidence intervals for each element of a matrix of Pearson correlations showing associations between variables.

This method is also suggested by Howell (2002) and has advantages over using 95% confidence intervals based upon regression coefficients of standardised variables in giving asymmetric intervals which are contained within the range [-1,1] and is, therefore, to be preferred.

A 95% confidence interval using the backtransformed Fisher transformation for a *single* Pearson correlation may also be computed using this on-line calculator.

References

Bonett DG (2019) Point-biserial correlation: Interval estimation,hypothesis testing, meta-analysis, and sample size determination. To appear *British Journal of Mathematical and Statistical Psychology*. Confidence intervals for different types of bi-serial correlations used as alternative two group effect sizes to Cohen's d.

Howell DC (2002) Statistical Methods for Psychologists. Fifth Edition. Wadsworth:Pacific Grove, CA.

Weaver B and Koopman R (2014) An SPSS Macro to Compute Confidence Intervals for Pearsonâ€™s Correlation. To appear in *The Quantitative Methods for Psychology* in Spring 2014.