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Messages - Dany

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Questions and Answers / DIF on items level
« on: September 04, 2017, 03:12:38 PM »
Please, I would be grateful if anyone could help me in getting the differential item function on items level in multidimensional model please.
I have my items and each with diffrent level ( All are 3 levels; low, high and intermediate). How can I make DIF (as gender for example) but on items level?

Thanks in advance.

Questions and Answers / Re: Missing items and discrimination
« on: July 28, 2017, 01:29:20 PM »
No, I didn't use EFA.
I have version 4.5, I have downloaded it from the website: I have that warning each time I estimate the data.
What can I do for these data?
Actually, these are my real data I have and the answers from students.
How can I get the results of these data?
Is there any solution please?
Thank you in advance.

Questions and Answers / Re: Missing items and discrimination
« on: July 26, 2017, 07:30:50 PM »
Thank you for replying. Attached are my data for your review please.
I cannot manage the problem that I am facing.
Thank you so much for reviewing.  :)
highly appreciated.

Questions and Answers / Re: Missing items and discrimination
« on: July 25, 2017, 12:17:39 PM »
Hello, thank you for replying,
I have qcm questions which are divided into two levels; low and intermediate. My model statement is (model item;)
I have 21 students and 32 items. After I made my data file composed from 21 row of data (students' id and their responses), and my label file composed from 32 items, in the estimation I got a warning (parameter (2) for item (2) is not identified) and for more items the same warning too. My cqc file is the same as the one i uploaded before, but I have changed the format statement and the model one ( model item;).
I uploaded a screenshot for the warning in the question before.
Please, I would like to know where is the problem so that I have this warning and how can I solve?
Actually I have spent one week learning conquest, getting and interpreting the data I need, but with my real data (21 students and 32 items) I am getting this warning, and it leads to removing the items from estimation.
Thank you for telling me how can I solve it.
Highly appreciated.  :)

Questions and Answers / Re: Missing items and discrimination
« on: July 23, 2017, 12:17:30 PM »
Thank you for your reply.
what i mean is the missing item. the item that has been missed in the test, Attached is an example from winstep, and i am trying to get this information in conquest, can I? (MISFITTING PERSONS OR ITEMS and OVER FITTING ITEMS).
Regarding the discrimination, it is not shown in my itanal output file. attached are my .cqc file and itanal file.
I have uploaded the one with wrong model statement, i am using (model item; ).

I have an error also and I cannot manage it. attach is a screenshot of the error. (Parameter(2) for item 2, is not identified)
How to solve this error?
Thank you.

Questions and Answers / Missing items and discrimination
« on: July 22, 2017, 12:27:58 PM »
Hello, I have tried a lot, but I didn't succeed in getting the missing items and the discrimination under conquest. Can anyone help me please?

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