Vertical scales are frequently developed using common item nonequivalent group linking. In this design, one can use upper-grade, lower-grade, or mixed-grade common items to estimate the linking constants that underlie the absolute measurement of growth. Using the Rasch model and a dataset from Curriculum Associates' i-Ready Diagnostic in math in…

The development, school district implementation, and initial validation of the Wicat Skills Assessment Test--a computerized testing system for state assessment objectives--are described. Testing with 10,000 students in grades 3, 5, 7, and 9 began in Texas in 1986-87 and 1987-88. Results support the feasibility for districtwide computerized…

The validity of eight critical thinking tests developed for the Pittsburgh (Pennsylvania) public schools was studied using scores from 100 students each in grades 5, 8, and 11 and questionnaire responses from teachers. Validity is discussed for providing diagnostic information, monitoring achievement, and influencing the curriculum. (SLD)