ERIC Number: ED472169
Record Type: RIE
Publication Date: 2002-Dec
Reference Count: N/A
Psychometric Principles in Student Assessment. CSE Technical Report.
Mislevy, Robert J.; Wilson, Mark R.; Ercikan, Kadriye; Chudowsky, Naomi
In educational assessment, what students say, do, and sometimes make is observed, and assessors attempt to infer what students know, can do, or have accomplished more generally. Some links in the chain of inference depend on statistical models and probability-based reasoning, and it is with these links that terms such as validity, reliability, and comparability are typically associated, constituting psychometric principles, as it were. Familiar formulas and procedures from test theory provide working definitions and practical tools for addressing those more broadly applicable qualities of the chains of argument from observations to inferences about students, as they apply to familiar methods of gathering and using assessment data. This report has four objectives: (1) it offers a framework for the evidentiary arguments that ground assessments; (2) examines where psychometric principles fit in this framework; (3) shows how familiar formulas apply these ideas to familiar forms of assessment; and (4) looks ahead to extending the same principles to new kinds of assessment. (Contains 13 figures and 85 references.) (Author/SLD)
Publication Type: Reports - Descriptive
Education Level: N/A
Sponsor: Office of Educational Research and Improvement (ED), Washington, DC.
Authoring Institution: California Univ., Los Angeles. Center for the Study of Evaluation.; National Center for Research on Evaluation, Standards, and Student Testing, Los Angeles, CA.