Thank you very much for a detailed and informative video. I was trying to install extensions in SPSS for ITR but was not able to. This gave me a much appreciated alternative.
Thank you so much for creating this helpful video. When I try to run the analysis, it's "estimating parameters" for 10+ hours and never produces the results. I tried using two different computers. Does anyone have any advice or suggestions?
@@VahidAryadoust Thank you so much, one more question is how do you interpret the result if the questionnaire is a health-related one, let's say for example if it's to measure the severity of disease?
Thank you so much, Prof. Vahid. But I have a question. Is there any possibility to conduct 2-PL or 3-PL analysis for polytomous scores or/and rater severity in Jmetrik?
Sorry, I didn't make it clear. I wonder is that Rasch Model (also 1PL) test many facets like examinee ability, rater severity, task difficulty, criterion difficult .... 2PL/3PL only test two facets--- item difficulty and examinee ability with item discrimination parameter and guessing parameter added? Is there any way testing both many facets and item discriminition and guessing parameter?
@@carinasong9237 Facets will not be the suitable software for that type of analysis. I am not aware of IRT 2PL or 3PL with a facets format. sorry.
Год назад
Best wishes from Brazil, master. Is there any possibility to set a score system from 0 to 1000 on IRT model? I need to give a score for a classroom of 45 students, they did a test with 45 items and I wanna personalize their scores equal our ENEM (SAT). If so, can you give me a brief configuration on jmetrix? tks in advance.
Hi there! I am running the data, and I did all the steps which you mentioned but I am not getting the results, it is running parameters for over an hour. I had closed the tab and ran other things like frequency etc and those things are perfectly running. Kindly help
Thank you very much for a detailed and informative video. I was trying to install extensions in SPSS for ITR but was not able to. This gave me a much appreciated alternative.
This was great! Thank you so much..very detailed and easy to follow!
Thanks sir...I would like to ask regards d chi square in determining model fit and how to calculate -2LL for each model
Thank you so much for creating this helpful video. When I try to run the analysis, it's "estimating parameters" for 10+ hours and never produces the results. I tried using two different computers. Does anyone have any advice or suggestions?
possible causes: miskeyed-in data (check your data); too much missing data; very very large sample size; misspecification of the parameter.
Thank you for this informative tutorial. I was wondering what do you recommend for missing data? Thanks
IRT is sensitive to missing data, but Rasch measurement is quite tolerant of it.
@@VahidAryadoust Thank you so much, one more question is how do you interpret the result if the questionnaire is a health-related one, let's say for example if it's to measure the severity of disease?
@@zohregh2213 I am not sure about that. I suggest you ask a medical expert.
Thanks it was a very informative tutorial, how can do analysis if student has skipped the question?
You can replace them with '0' or just leave the missing cell in your data. I will be ignored.
Thank you so much, Prof. Vahid. But I have a question. Is there any possibility to conduct 2-PL or 3-PL analysis for polytomous scores or/and rater severity in Jmetrik?
You can do 2PL/3PL for polytomous data, but I am not sure if rater severity can be handled using jMetrik. Please see my videos on Facets.
best wishes
Sorry, I didn't make it clear. I wonder is that Rasch Model (also 1PL) test many facets like examinee ability, rater severity, task difficulty, criterion difficult .... 2PL/3PL only test two facets--- item difficulty and examinee ability with item discrimination parameter and guessing parameter added? Is there any way testing both many facets and item discriminition and guessing parameter?
@@VahidAryadoust BTW. I've conducted a Rasch analysis before. Your Facet video deepened my command of Facet a lot!
@@carinasong9237 great! best wishes.
@@carinasong9237 Facets will not be the suitable software for that type of analysis. I am not aware of IRT 2PL or 3PL with a facets format. sorry.
Best wishes from Brazil, master. Is there any possibility to set a score system from 0 to 1000 on IRT model? I need to give a score for a classroom of 45 students, they did a test with 45 items and I wanna personalize their scores equal our ENEM (SAT). If so, can you give me a brief configuration on jmetrix? tks in advance.
Hi, Theoretically, it is possible, but as the sample size is small in your case, I imagine it will yield high standard errors.
@@VahidAryadoust Tks professor any video showing the steps?
Hi there! I am running the data, and I did all the steps which you mentioned but I am not getting the results, it is running parameters for over an hour. I had closed the tab and ran other things like frequency etc and those things are perfectly running. Kindly help
It seems that the parameter estimation does not converge. I am not sure about the reason though. Try using a different sample and re-run the analysis.
I have the same problem
هل فيه شرح عربي