Hi All,
I am using raw data.
Following is an example of my data frame
P1 P2 P3
H 1 1 1
M 2 4 2
L 2 2 2
H,M,L relate to the three cases, and P1 to P3 relate to the
raters/participants.
The problem I am having is if all the values are 1 in the above data frame
(say I have named it r1.df) and I use the following command
kappam.fleiss(r1.df) I get a negative kappa value.
Thanks and Regards
Mehdi E
On Tue, Jul 14, 2009 at 2:09 AM, William Revelle <li...@revelle.net> wrote:
> At 6:48 PM +1200 7/13/09, mehdi ebrahim wrote:
>
>> Hi All,
>>
>> I am using fleiss kappa for inter rater agreement. Are there any know
>> issues with Fleiss kappa calculation in R? Even when I supply mock data
>> with total agreement among the raters I do not get a kappa value of 1.
>> instead I am getting negative values.
>>
>> I am using the irr package version 0.70
>>
>> Any help is much appreciated.
>>
>
> Mehdi,
> Are you by any chance giving the function the agreement matrix rather than
> the raw data? The kappam.fliess function seems to want the ratings rather
> than the agreement matrix.
>
> Bill
>
>
> --
> William Revelle http://personality-project.org/revelle.html
> Professor
> http://personality-project.org/personality.html
> Department of Psychology
> http://www.wcas.northwestern.edu/psych/
> Northwestern University http://www.northwestern.edu/
> Attend ISSID/ARP:2009 http://issid.org/issid.2009/
>
--
Mehdi
(You want something? Go Get It! . - A pursuit for happiness )
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
