Two procedures for the display of item analysis statistics are described. One procedure allows for investigation of difficulty; the second plots item difficulty against item discrimination. (Author/JKS)

Cliff's Index "c" derived from an item dominance matrix is utilized in a clustering approach, termed extracting Reliable Guttman Orders (ERGO), to isolate Guttman-type item hierarchies. A comparison of factor analysis to the ERGO is made on social distance data involving multiple ethnic groups. (Author/BW)

A strategy for overcoming problems with the Rasch model's inability to handle missing data involves a pairwise algorithm which manipulates the data matrix to separate out the information needed for the estimation of item difficulty parameters in a test. The method of estimation compares two or three items at a time, separating out the ability…

Issues of concern to test developers interested in applying the Rasch model are discussed. The current state of the art, recommendations for use of the model, further needs, and controversies are described for the three stages of test construction: (1) definition of the content of the test and item writing; (2) item analysis; and (3) test…

The manual for administration of the Chinese Proficiency Test contains an overview of the program, including: (1) its history, content, and format; (2) its primary focus and uses; (3) administration procedures, including registration, ordering the test, reporting scores, and billing; (4) the interpretation of test scores based on normative data…

The Basic Occupational Literacy Test (BOLT) was developed as an achievement test of basic skills in reading and arithmetic, for educationally disadvantaged adults. The objective was to develop a test appropriate for this population with regard to content, format, instructions, timing, norms, and difficulty level. A major issue, the use of grade…

Greater knowledge about the practical application of Rasch technology can help in avoiding misapplications and confusions in testing programs. Equal interval curriculum-based scaling makes possible the following improvements in measuring basic skills achievement by enabling testing programs to: (1) individualize the difficulty level of…