ERIC Number: ED286923
Record Type: Non-Journal
Publication Date: 1987-Apr
Pages: 33
Abstractor: N/A
ISBN: N/A
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Available Date: N/A
Riding the Rasch Tiger. Part 3: Rasch-Based Evaluation (Without Regrets or Regression to the Mean).
Karr, Chad
Rasch methodology facilitates effective achievement comparisons to meet evaluation needs at the district, school, classroom, and individual levels. The five-year District Gains Graph developed by the Portland (Oregon) Public Schools charts fall-to-spring achievement gains in basic skills for Grades 3-8, as measured by the Portland Achievement Levels Tests. The gain graph permits longitudinal comparisons of students moving through five grades, and comparisons of students in a given grade across five years. Because of the Rasch model, achievement gains in the district can be measured independently of norm groups. Likewise, at the school level, evaluation can be independent of district norms. That is, because school achievement plots relate students' scores to an equal-interval curriculum scale, each school can demonstrate its own instruction-based achievement gains, even if the average achievement is low for the district. The School Program Evaluation Guide is helpful in evaluating the size of achievement gains. Regression to the mean as it affects pre-post achievement gains can be corrected for. The paper describes goal reports for evaluating achievement in basic skills subgoals as well as a number of available formats for reporting Rasch-scaled achievement data, including those designed by Microsystems for Education and Business, Inc. (LPG)
Publication Type: Speeches/Meeting Papers; Reports - General
Education Level: N/A
Audience: Researchers
Language: English
Sponsor: N/A
Authoring Institution: N/A
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Author Affiliations: N/A