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Help desk => Questions and Answers => Topic started by: lannk on September 05, 2019, 08:32:00 AM

Title: Asking about facet model with SPSS datafile
Post by: lannk on September 05, 2019, 08:32:00 AM
Good afternoon,

My name is Lan Anh, a Ph.D. student at University of Melbourne.
I have a problem with the facet model with SPSS data.

Would it is possible that you could have a look and give me some suggestion?
I also attached the syntax file for your references.

Thank you so much & Best regards,

Anh Nguyen
Title: Re: Asking about facet model with SPSS datafile
Post by: dan_c on September 06, 2019, 12:03:52 AM
Hi Lan Anh,

You can specify a facet mode using an SPSS like this (based on your cqc file attached):

Code: [Select]
datafile  Obs.sav !
    filetype=spss, responses=A1 to C6, keeps = ObsID;

...


model item+step+item*step+ObsID;

This will give you a partial credit with a main effect for rater (ObsID) harshness. You will need to carefully think about model identification if you want to fit more complex models, like then in your attached cqc file - I don't think you will have an observation of every rater using every response category for every item in order to include the item*step*ObsID interaction.
Title: Re: Asking about facet model with SPSS datafile
Post by: lannk on September 06, 2019, 04:52:00 AM
Hi Dan,

Thank you for your guidance, the portable code is very simple and clear than what I wrote.

I also modify and recognize that there are spaces in command "keep = ObsID". This is the reason why I cannot run the ConQuest.

After I fix it, the ConQuest now runs perfectly, even with my syntax.

Thank again for your consultant.

Best regards,

Lan Anh