Re: st: FW: ICC and loneway

[JOHN ANTONAKIS <john.antonakis@unil.ch>]

You should have the data in the long format for this to work, with dummy 
(indicator) variable for x1 (=0) and x2(=1), not in the wide format as 
you do now. Type -help loneway- to see the example they use. To reshape 
the data look at the -reshape- command.

HTH,
John.

____________________________________________________

Prof. John Antonakis
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Faculty of Business and Economics
University of Lausanne
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On 15.01.2009 13:56, Sham Lal wrote:
> Dear Statlisters
>
> I am looking to compare the ratings of pain between two observers x1 x2 and am using the loneway command to produce ICC's. However, I don't completely believe that loneway is producing what I require. My data is organised as follows:
>
> Idno    pain_x1     pain_x2
> A1        53                   74
> A2        62                   23
> B3        15                   12
> B5         86                  52  
>
> The output after running loneway pain_x1 pain_x2 is as follows:
> One-way Analysis of Variance for pain_x1: 
>
>                                               Number of obs =       203
>                                                   R-squared =    0.9025
>
>     Source                SS         df      MS            F     Prob > F
> -------------------------------------------------------------------------
> Between pain_x2         135346.15     68    1990.3846     18.25     0.0000
> Within pain_x2          14613.739    134    109.05775
> -------------------------------------------------------------------------
> Total                  149959.89    202     742.3757
>
>          Intraclass       Asy.        
>          correlation      S.E.       [95% Conf. Interval]
>          ------------------------------------------------
>             0.85839     0.03899       0.78197     0.93481
>
> This is comparing the variation between just pain_x2, I fear this is not correct?
> Any help would be appreciated
>
> Sham 
>
>
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