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Re: Jittering interval and ordinal variables in graphs. was "What does this graph means?"

Posted by Mike on Jan 30, 2013; 4:15pm
URL: http://spssx-discussion.165.s1.nabble.com/What-does-this-graph-means-tp5717745p5717821.html

I would only that one should probably also look at the following:

An article by Hopkins et al (2011) that identifies some problems
with the Drummond et al (2011) articles:
http://jp.physoc.org/content/589/21/5327.full

And Drummond et al's response:
http://jp.physoc.org/content/589/21/5331.full

-Mike Palij
New York University
[hidden email]


----- Original Message -----
From: "Bruce Weaver" <[hidden email]>
To: <[hidden email]>
Sent: Wednesday, January 30, 2013 10:26 AM
Subject: Re: Jittering interval and ordinal variables in graphs. was "What
does this graph means?"


> Art, this should help in chasing down the other articles in the series:
>
> http://jp.physoc.org/cgi/collection/stats_reporting?page=1
> http://jp.physoc.org/cgi/collection/stats_reporting?page=2
>
>
>
> Art Kendall wrote
>> I really like the idea
>>         of jittering for interval e.g., Likert,
>>           and ordinal variables.
>>       Especially since they are often operationalizations of�  constructs
>>       that are continuous.
>>
>>       the article says that it is part of a series.�  I'll try to chase
>>       them down when I get some time.
>>
>>       Art Kendall
>> Social Research Consultants
>>       On 1/29/2013 8:47 PM, Andy W wrote:
>>
>>
>>       Ahh! This is the point I was making by advocating the jittered
>> scatterplot,
>> how exactly do you make the box-plots for the categories with only 1 and
>> 3
>> observations! Box-plots are certainly reasonable with more data, but with
>> this few of points jittered scatterplots work quite well.
>>
>> To each his own whether or not people feel the "artefact" in the jittered
>> plot is unreasonable. IMO it is only unreasonable as much as you consider
>> it
>> reasonable to think of the ordinal scores as specific to the particular
>> arbitrary numeric values you assign them to begin with. And it is
>> certainly
>> not anymore a complicated topic to discuss how to interpret the jittered
>> plot than any correlation coefficient!
>>
>> For reference with synonymous situations, please read
>>
>> Drummond, Gordon B. &amp; Sarah L. Vowler. 2011.  Show the data, don’t
>> conceal
>> them &lt;http://dx.doi.org/10.1113/jphysiol.2011.205062&gt;   . The
>> Journal of
>> Physiology 598(8): 1861-1863. PDF available from publisher.
>>
>>
>>
>> -----
>> Andy W
>
>> apwheele@
>
>>
>> http://andrewpwheeler.wordpress.com/
>> --
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>
> -----
> --
> Bruce Weaver
> [hidden email]
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>
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