At 01:49 PM 11/19/01 -0500, Wuensch, Karl L wrote: > Callender and Osburn (Educational and Psychological Measurement, >1977, 37, 819-825) developed a method for estimating maximized lambda4, the >greatest split-half reliability coefficient among all possible split halves >for a scale. The method is quite tedious to do by hand, and the authors >provided a FORTRAN program for accomplishing it. Not having a FORTRAN >compiler, I'm considering writing an SAS program (IML) to do this, but don't >want to waste my time reinventing the wheel if someone else has already >written an SAS or SPSS program for this purpose. If you are aware of any >such program, please advise me. Thanks. > > By the way, Callender and Osburn's work indicates that maximized >lambda4 is a much better estimate of a test's true reliability than is >lambda3 (coefficient alpha).
how do we know what a test's true reliability is? > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >Karl L. Wuensch, Department of Psychology, >East Carolina University, Greenville NC 27858-4353 >Voice: 252-328-4102 Fax: 252-328-6283 >mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> >http://core.ecu.edu/psyc/wuenschk/klw.htm ><http://core.ecu.edu/psyc/wuenschk/klw.htm> > > > >================================================================= >Instructions for joining and leaving this list and remarks about >the problem of INAPPROPRIATE MESSAGES are available at > http://jse.stat.ncsu.edu/ >================================================================= _________________________________________________________ dennis roberts, educational psychology, penn state university 208 cedar, AC 8148632401, mailto:[EMAIL PROTECTED] http://roberts.ed.psu.edu/users/droberts/drober~1.htm ================================================================= Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =================================================================
