Missing value analysis/ Little's mcar test

Discuss the jamovi platform, possible improvements, etc.
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delvecct
Posts: 1
Joined: Fri Jun 14, 2019 6:21 pm

Missing value analysis/ Little's mcar test

Post by delvecct »

How do I use Jamovi to determine whether missing data is mcar? Is there a Little's mcar test somewhere?
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jonathon
Posts: 2613
Joined: Fri Jan 27, 2017 10:04 am

Re: Missing value analysis/ Little's mcar test

Post by jonathon »

hi,

i don't know what mcar is, and i don't think jamovi provides it - but if you figure out how to do it in R, you'll be able to run it in jamovi with the Rj editor.

https://blog.jamovi.org/2018/07/30/rj.html

cheers

jonathon
ConalMonaghan
Posts: 1
Joined: Mon Mar 02, 2020 12:54 am

Re: Missing value analysis/ Little's mcar test

Post by ConalMonaghan »

Hi Jonathon and Devecct,
I think this would be a great addition to JAMOVI. Presently, we have to do all data cleaning and screening in R, then export into JAMOVI. While it is possible to do tests just as Mahalanobis (multi-variate outliers) using the work around in Rj and the psych package, there is no package in the JAMOVI database that can test for missing at random (MCAR), or engage in imputation or regression substitution.

Potentially having a module that tested the nature of missing data (MCAR) and imputation as needed would work well, alternatively, if you could introduce another package such as MissMech to the JAMOVI r library then the Rj solution would work.
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jonathon
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Joined: Fri Jan 27, 2017 10:04 am

Re: Missing value analysis/ Little's mcar test

Post by jonathon »

what if you use 'system R', from Rj, rather than the R bundled with jamovi?

https://blog.jamovi.org/2018/07/30/rj.html

jonathon
ard
Posts: 2
Joined: Wed Feb 24, 2021 4:30 pm

Re: Missing value analysis/ Little's mcar test

Post by ard »

I have tried it and from what I can gather online, in order to carry the MCAR test, R requires the installation of the naniar library, which we don't have access to through Jamovi. Is there a way to access that? So far there seems to be no way of doing MCAR
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