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Re: More intersting revelations from EdTrust
- Subject: Re: More intersting revelations from EdTrust
- From: Susan Harman <susanharman@IGC.ORG>
- Date: Mon, 7 Jan 2002 22:43:51 -0800
- Reply-to: Assessment Reform Network Mailing List <ARN-L@LISTS.CUA.EDU>
- Sender: Assessment Reform Network Mailing List <ARN-L@LISTS.CUA.EDU>
Do they change the test from admin to admin/year to year? Have they made
it easier over the years? These are high p values; were they always?
Susan
>
>
> The "p value" or "item difficulty" is the percentage of test-takers who get the item right. So an item with a p value of 0.20 would be a relatively hard item.
>
>
>
> Would a test with no item under, say, .55 be a reasonable test? I am not sure I can phrase this question. I have the p values of the SOL tests for last year. On initial scan,
> most questions have p values of .60 and up. Many questions are .85 and up.
> Should I be comparing mean p-values from test administration to test administration?
> Mickey
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