Casewise Diagnostics

[Desmond Steyn]

Good day

Does SPSS Casewise diagnostics produce the variables which are a chosen
standard deviation from the mean? Or are these standard deviations
calculated based on another item?

I read an Journal article regarding outlier detection which states that the
method of using the standard deviation around the mean method is incorrect,
and that the deviation around the median around the median is a much better
method. I think that the casewise diagnostics method in SPSS uses the mean
method.

Reference

Leys, C., et al., Detecting outliers: Do not use standard deviation around
the mean, use absolute deviation around the
median, Journal of Experimental Social Psychology (2013),
http://dx.doi.org/10.1016/j.jesp.2013.03.013



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[Bruce Weaver]

Members interested in this topic should note that Peter posted the same
question to ResearchGate.

https://www.researchgate.net/post/Does_Casewise_diagnostics_in_SPSS_provide_the_variables_with_a_standard_deviation_of_your_selection_based_on_the_mean_Or_anything_else_than_the_mean



Desmond Steyn wrote

> Good day
>
> Does SPSS Casewise diagnostics produce the variables which are a chosen
> standard deviation from the mean? Or are these standard deviations
> calculated based on another item?
>
> I read an Journal article regarding outlier detection which states that
> the
> method of using the standard deviation around the mean method is
> incorrect,
> and that the deviation around the median around the median is a much
> better
> method. I think that the casewise diagnostics method in SPSS uses the mean
> method.
>
> Reference
>
> Leys, C., et al., Detecting outliers: Do not use standard deviation around
> the mean, use absolute deviation around the
> median, Journal of Experimental Social Psychology (2013),
> http://dx.doi.org/10.1016/j.jesp.2013.03.013
>
>
>
> --
> Sent from: http://spssx-discussion.1045642.n5.nabble.com/
>
> =====================
> To manage your subscription to SPSSX-L, send a message to

> LISTSERV@.UGA

>  (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD





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Bruce Weaver
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