Winsorizing in meta-analysis

Posted by Art Kendall on Apr 30, 2011; 8:47pm
URL: http://spssx-discussion.165.s1.nabble.com/Winsorizing-in-meta-analysis-tp4361802.html

I am not near my books right now, so I would like to get feedback from the list.

A colleague was saying that she took a course a few weeks ago, and the prof said that winsorizing  usually should be done in meta-analysis.  I found this surprising but she was adamant.

In general, over analyses in general I have found that a subjective 80% of anomalous values are data entry errors. I have grudgingly trimmed or winsorized only when the value of a variable  is substantively implausible?

What is your experience?

Is routinely winsorizing in meta-analysis  what you teach?

If you do winsorize in meta-analysis, how often do you do it? How do you decide when to do it?

Is this the current practice?


Art Kendall
Social Research Consultants





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