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Interaction search tool - Main Effects ill-conditioned

When I run the ACBC interaction search tool, it results Main Effects as ill-conditioned (---), whereas it is showing interaction between 2 of the attributes. how should this result be interpreted ?
Can that be because I havent included BYO into my design ?

asked Dec 11, 2014 by anonymous

1 Answer

0 votes
Sounds like you need to back up and consider what is going on with your main effects design in ACBC.

Did you include any prohibitions in your design?

Are you doing anything unusual such as constructed lists for attributes or levels of attributes?

The interaction search tool will show you details (under the Runs tab) of the aggregate logit run that resulted in the ill-conditioned message.  Please examine this to see if it can give you some direction regarding what is going wrong.

If you're still stuck, I'd contact our tech support line at 801/477-4700 or write support at sawtoothsoftware dot com.
answered Dec 11, 2014 by Bryan Orme Platinum Sawtooth Software, Inc. (148,340 points)
ill-defined main effects? what to do ?