# NAME Yutaka KANO TITLE Professor of Statistics, Doctor of Engineering AFFILIATION Osaka University, Graduate School of Engineering Science, Division of Mathematical Science, joint appointment with Graduate School of Human Science ADDRESS Toyonaka, Osaka 560-8531, JAPAN EMAIL kano AT sigmath.es.osaka-u.ac.jp RESEARCH INTEREST multivariate analysis; psychometrics; incomplete data analysis; structural equation modeling; graphical modeling; statistical causal inference SERVICE Associate Editor of Psychometrika (2000-) Chief Editor of Behaviormetrika (2000-2003) Associate Editor of Journal of Multivariate Analysis (2002-) Board of Trustees of the Psychometric Society (2002-2005) Associate Editor of Annals of the Institute of Statistical Mathematics(2003-) Editorial Board Member of Advances in Data Analysis and Classification (2006-)

## PUBLICATIONS

### [42] Kano, Y. and Azuma, Y. (2003). Use of SEM programs to precisely measure scale reliability. In New Developments in Psychometrics (Yanai, H. et al., Eds.), pp.141-148. Springer Verlag: Tokyo. [pdf file]

It is first pointed out that most often used reliability coefficient $\alpha$ and one-factor model based reliability $\rho$ are seriously biased when unique factors are covariated. In the case, the $\alpha$ is no longer a lower bound of the true reliability. Use of Bollen's formula (Bollen 1980) on reliability is highly recommended. A web-based program termed STERA" is developed which can make {\it stepwise}\, reliability analysis very easily with the help of factor analysis and structural equation modeling.