Nine school effectiveness indices computed by five different methods from longitudinal data are compared. Data consisted of Total Reading scores from the Metropolitan Primary II Achievement Test administered to third-graders in 70 elementary schools. (Author/RC)

This study examines the performance of a new method for assessing and characterizing dimensionality in test data using the NOHARM model, and comparing it with DETECT. Dimensionality assessment is carried out using two goodness-of-fit statistics that are compared to reference X[2] distributions. A Monte Carlo study is used with item parameters…