[IPAC-List] Unidimensionality

Shekerjian, Rene Rene.Shekerjian at cs.state.ny.us
Thu Dec 2 09:14:24 EST 2010

I was wondering what folk's (your) understanding of unidimensionality was. I am guessing that most would agree that something like the ability to add single digit numbers without carrying would be pretty close to unidimensional. But past something like that, at what point does an ability become multidimensional?

Adding single digit numbers with carrying?

Dividing double digit numbers?

Calculating the standard deviation?

Driving a car?

Supervising staff?

And do you consider there to be both theoretical unidimensionality and practical unidimensionality? Or is there only one kind?

Thank you in advance,


René Shekerjian | Testing Services Division | NYS Department of Civil Service | 518-474-3778


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