Certainly. The original Kuder-Richardson 20 formula is the dichotomous version of Cronbach’s alpha. You need to look at the means and variances of the items as well and their correlation with the total score. That will likely indicate where the problem is.
Dr. Paul R. Swank,
Children's Learning Institute
Professor, Department of Pediatrics, Medical School
Adjunct Professor, School of Public Health
University of Texas Health Science Center-Houston
From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of Mark Webb
Sent: Thursday, November 03, 2011 9:52 AM
To: [hidden email]
Subject: Appropriate to use Cronbach Alpha on a Yes/No scale
I'm attempting this and getting very low Alphas.
Is it advisable to use the measure with a 2 point scale?
--
Mark Webb