I'm testing an education assessment (evaluating quantitative skills in
biology students) for reliability. I used cronbach's alpha, but got a
really low alpha which I think is likely due to my small number of
questions (12) and the fact that the questions are of varying difficulty.
After a lot of reading, it looks like Rasch models are probably a more
appropriate tool for my question so I've figured out how to do that
analysis in R using the eRm package. But now I'm having a really hard time
interpreting the output and finding resources to help.
Here are the results of my RM estimation:
Conditional log-likelihood: -394.9651
Number of iterations: 25
Number of parameters: 11
Can anyone help me interpret? I can post further output if you can help,
but didn't want to send a giant email of results!
Thanks
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