September 12, 2008 at 4:43 am

Greg wote:

I spent about two hours entering data into the calculator (224 cases and 17 categories). When I pushed the button to calculate the results, I was continually asked to ensure I had entered the number of raters (which I had–2 raters). Eventually, I lost everything, including two hours of my life.

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September 13, 2008 at 3:40 am

Justus Randolph wrote:



We figured out that the two hours of lost life was because the empty cells were left blank and not filled in with zeros. I’ll make a note in the “Instructions” that no cell can be left empty–empty cells need to have a zero.

Greg, thanks for pointing out this point of confusion and sorry about the wasted time.

Justus

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September 13, 2008 at 4:12 am

Greg


When I made it clear that the calculator was not working for me, Justus went to a lot of trouble to solve the problem for me. Now that we understand the error that was made, everything works great.
The calculator caused a headache for a period, but once Justus figured out where things were going wrong, the calculator has been fantastic and I can feel my lost life returning!
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Usability suggestion

August 22, 2008 at 2:14 pm

roman

Usability-wise, I think you should move the calculator behind one extra link (or a ‘Start’ button). What happens is that the java application will load whatever you want it or not (e.g. for just to check the references). On most computers, the loading takes quite a long while and the browsers often chuck on it.

Can't open calculator

August 20, 2008 at 6:49 pm

Brenda said:

I have not been able to open to calculator (Java applet problem)…any ideas on getting the applet to run???


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August 21, 2008 at 10:53 pm

Justus Randolph

(edit)

Hi Brenda,
I checked the site and it is working on my computer. Earlier I had a problem on this computer where the java wouldn’t load. Uninstalling and then reinstalling the latest version of java worked to get the issue resolved on my own computer. Let me know if this tack doesn’t work.
Reply
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August 21, 2008 at 10:56 pm

Justus Randolph

(edit)

P.S., you have to accept the digital certificate, so that you can cut and paste your data from a spreadsheet program.
Reply
op

The Online Kappa Calculator

Hi all,

I'd like to announce the debut of the "Online Kappa Calculator." It calculates free-marginal and fixed-marginal kappa--a chance-adjusted measure of interrater agreement--for any number of cases, categories, or raters. Roman and Nikko will appreciate this; now we don't have to do these calculations the hard way!

Thanks to Walubengo M. Singoro for his fantastic programming work on this.

Check out:

http://justus.randolph.name/kappa

I'm going on vacation to the States tomorrow. If you have any comments, I'll get back to you in a few weeks. Is anyone else interested in creating a collection of calculators for obscure, but intensely useful, statistics? I have ideas for many student programming projects along this line.