Approaches in Testing Unidimensionality with dichotomous (0/1) variables

[E. Bernardo]

Would you suggest some approaches in Testing dimensionality with dichotomous (0/1) variables?

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[Bruce Weaver]

Are you asking how to do factor analysis with dichotomous variables?

E. Bernardo wrote

Would you suggest some approaches in Testing dimensionality with dichotomous (0/1) variables?

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[Art Kendall]

Please give more detail on the context in which this question arises.

Are you trying to create or evaluate  a summative scale? FACTOR and RELIABILITY could be what you would need.

Recall that, as surprising as it is to some people, dichotomous variables are at the interval level of measurement. Since there is only 1 interval, all intervals are perfectly identical to each other.

[David Marso]

Rasch models have been around for a very long time (over 30 years).
Do your research Eins.

E. Bernardo wrote

Would you suggest some approaches in Testing dimensionality with dichotomous (0/1) variables?

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[Ryan]

Item Response Theory / Rasch Models. In SPSS, one could fit a bifactor exploratory model employing the Schmid-Leiman method. This requires knowledge of the MATRIX command. Alternatively, one could utilize the very user-friendly experimental IRT procedure in SAS.

 

Ryan

On Thu, Jun 25, 2015 at 9:30 AM, David Marso <[hidden email]> wrote:

Rasch models have been around for a very long time (over 30 years).
Do your research Eins.


E. Bernardo wrote
> Would you suggest some approaches in Testing dimensionality
> with dichotomous (0/1) variables?
>
> =====================
> To manage your subscription to SPSSX-L, send a message to

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[E. Bernardo]

Thank you all for your comments.

Yes, I am aware of the IRT and Rasch Analysis.  However, reviewers who are not aware of IRT and Rasch Analysis insist to use traditional approach of testing unidimentionality of a construct before it will be subjected to IRT/Rasch.

On Thursday, June 25, 2015 10:25 PM, Ryan Black <[hidden email]> wrote:

Item Response Theory / Rasch Models. In SPSS, one could fit a bifactor exploratory model employing the Schmid-Leiman method. This requires knowledge of the MATRIX command. Alternatively, one could utilize the very user-friendly experimental IRT procedure in SAS.

 

Ryan

On Thu, Jun 25, 2015 at 9:30 AM, David Marso <[hidden email]> wrote:

Rasch models have been around for a very long time (over 30 years).
Do your research Eins.


E. Bernardo wrote
> Would you suggest some approaches in Testing dimensionality
> with dichotomous (0/1) variables?
>
> =====================
> To manage your subscription to SPSSX-L, send a message to

> LISTSERV@.UGA

>  (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD





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Please reply to the list and not to my personal email.
Those desiring my consulting or training services please feel free to email me.
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"Nolite dare sanctum canibus neque mittatis margaritas vestras ante porcos ne forte conculcent eas pedibus suis."
Cum es damnatorum possederunt porcos iens ut salire off sanguinum cliff in abyssum?"
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View this message in context: http://spssx-discussion.1045642.n5.nabble.com/Approaches-in-Testing-Unidimensionality-with-dichotomous-0-1-variables-tp5729936p5729946.html
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