Questionnaire more-Performance Diagnostic Questionnaire moremore... Articles on Data Analysis and Psychometrics Authored by Profile Plus Team Members Click on an article to view its... Annual Convention of the American Psychological Association, Washington, D. C. ABSTRACT: Consider the following statement: "The data from the psychological scale were factor analyzed... there is a significant error component in the data, as there almost always is, factor analysis methods cannot separate error from structure. That is, for more than half a century...

is the author of three major Large Scale Data Analysis software systems and the founder of the BYU Multivariate Visualization Laboratory. Bruce has been involved in numerous software... developing proprietary techniques for dealing with large data sets. Bruce received his Ph.D. in psychology from McGill University and began a career in measurement, evaluation..., and statistics. He and his colleagues Alvin Rencher and William Strong began studying multivariate visualization methods in the 1960's , which Bruce has continued to research. He...