Grant Closed

Psychometrics and Value Added Modeling

NCER

Program: Statistical and Research Methodology in Education

Program topic(s): Core

Award amount: $167,239

Principal investigator: Harold Doran

Awardee:

American Institutes for Research (AIR)

Year: 2006

Award period: 1 year 4 months (09/30/2006 - 01/29/2008)

Project type:

Methodological Innovation

Award number: R305U060004

Purpose

Under this grant, the research team is empirically examining the degree to which some psychometric decisions made in calibrating student response data on state assessment programs influence the teacher effects estimated under VAM. The study will examine the impacts on VAM teacher effect estimates for one-, two- and three-parameter models and comparing vertically scaled versus not vertically scaled student scores, using maximum likelihood estimation (MLE) procedures.