Item-level statistics from ability and achievement tests have been underutilized as sources of data for building models of cognitive development. How item data can be used to build a cognitive-developmental map of proportional reasoning is demonstrated. The product of the analysis is a cognitive hierarchy with levels corresponding to categories of…

One of 10 reports in a longitudinal study of Project Head Start submitted by NTS Research Corporation to the Administration for Children, Youth and Families, this document presents the individual testing battery used for the fall 1979 cohort. The first chapter identifies the skill areas to be tested in an analysis of Project Head Start's…

The Number Test of the ACER Mathematics Profile Series, contains 30 items, for each of three suggested grade levels: 7-8, 8-9, and 9-10. Raw scores on all tests in the ACER Mathematics Profile Series (Number, Operations, Space and Measurement) are converted to a common scale called MAPS, a major feature of the Series. Based on the Rasch Model,…

In 1985-86, reading was identified as the supplemental instructional area of the Albuquerque (New Mexico) Public Schools (APS) for funding under the Education Consolidation and Improvement Act, Chapter 1. In all, 39 elementary schools, 13 middle schools, and 4 high schools in the APS qualified for Chapter 1 services; 4,317 elementary school…