Date: Tue, 1 Apr 2003 20:25:23 +0100
Reply-To: Jeremy Miles <firstname.lastname@example.org>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: Jeremy Miles <email@example.com>
Subject: Re: Negative Coeeficient Alphas
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Negative alphas are theoretically impossible, as alpha is a proportion of
variance. This most commonly occurs when you have failed to reverse some
items that should have been reversed.
At 14:20 01/04/2003 -0500, Spencer Baker wrote:
>I am using an instrument that has lower level scales and an overall scale.
>It was originally created for adults and I am using it with a much younger
>population to compare. I am receiving some low and negative coefficient
>alphas at the lower level scales but the overall scales are in the .70s.
>Is there an article that discusses this phenomenon? It is a small sample
>(N=151) so far.