Introduction to Reliability What is reliability? Reliability is an index that estimates dependability (consistency) of scores KuderRichardson (KR20)Coefcient alpha Splithalf reliability Alternateforms reliability Used to assess the consistency of the How can I calculate Cronbach's alpha using SPSS with two variables (categorical and continuous variable)?
(KuderRichardson's formula) can be used with dichotomous items. KR20 (KudarRichardson 20) Test associations between survey items written with dichotomous response sets When a survey instrument has items that use dichotomous response sets (yesno), then a special formula is required to establish reliability.
heard some individuals tell others that they MUST use a KuderRichardson KR20 coefficient instead of a Cronbach alpha. until you use STATISTICA or SPSS where the item and test score variances are not the KR20& coefficient alpha June, 2007 KuderRichardson Reliability Coefficients KR20 and KR21. Technote (troubleshooting) Problem(Abstract) Can SPSS calculate the KuderRichardson 20 (KR20) and KR21 coefficients of reliability for a scale?
Resolving the problem. KR20: The KR20 is a special case of Cronbach's Alpha in which the items are binary variables (usually scored as 0 or 1 Coefficient alpha; for dichotomous data, this is equivalent to the KuderRichardson 20 (KR20) coefficient.
Splithalf models. Correlation between forms, Guttman splithalf reliability, SpearmanBrown reliability (equal and unequal length), and coefficient alpha for each half. Kuder Career Search with Person Match (Interest Inventory) The Kuder Career Search with Person Match helps you discover your career interests, explore occupations beyond job titles, and effectively apply your personal interests to your career plans.
what is difference between Kuderrichardson and Cronbach's Alpha? for the reliability test. If you are using SPSS, see IBM link below for extra explanation and formula.
What is the Can I compute Cronbachs alpha with binary variables? Yes! If all of the scale items you want to analyze are binary and you compute Cronbachs alpha, youre actually running an analysis called the KuderRichardson 20. Calculating Reliability of Quantitative Measures Dr. K. A. Korb University of Jos Reliability Overview Reliability is defined as the consistency of results from a test.
rKR20 is the KuderRichardson formula 20 k is the total number of test items indicates to sum