When you are cleaning your raw data, you will want to check for outliers. The Mahalanobis Distance test identifies multivariate outliers. This video will teach you the steps to doing a Mahalanobis test in SPSS, how to compute the probabilities for the Mahalanobis scores, sort appropriately, decide which cases to exclude from further analysis, and write up the results in APA style.
This video is an abbreviated version of a longer video that also includes a review of outliers, an explanation of multivariate outliers, the use of the Chi-square distribution table, choosing cutoff scores for exploratory data analysis, and a fuller explanation of the theory behind Mahalanobis.

Full video:    • Finding Multivariate Outliers with th...  

This video teaches the following commands and techniques:
Mahalanobis test
Compute Variable

Tabachnick, B. G., & Fidell, L. S. (2013). Using multivariate statistics (6th ed.). Boston, MA: Allyn and Bacon.

SYNTAX:
COMPUTE pMAH_1= 1 - CDF.CHISQ(mah_1,8).
EXECUTE.
SORT CASES BY pMAH_1 (A).

This series uses the data set Mahalanobis_PH.sav
Link to a Google Drive folder with all of the files that I use in the videos including the dataset.
https://drive.google.com/drive/folder...