ERIC Number: ED404367
Record Type: Non-Journal
Publication Date: 1991-Oct-29
Reference Count: N/A
Report on TRP Analyses of Issues Concerning Within-Age versus Cross-Age Scales for the National Assessment of Educational Progress.
Haertel, Edward H.
The National Assessment Governing Board of Educational Progress has recently adopted the position that the National Assessment of Educational Progress (NAEP) should employ within-age scaling whenever feasible. The NAEP Technical Review panel (TRP) has studied the issue at some length, and reports on it in this analysis. The first section reviews the evidence concerning the tenability of the psychometric assumptions underlying cross-age (vertical) scaling, and considers whether NAEP trends or comparisons would appear materially different if within-age scaling were applied to existing NAEP data. The second section reviews the possible implications of a shift to within-age scaling for the design of the NAEP objectives frameworks and exercise pools. The third and final section relates cross-age versus within-age scaling to the substantive interpretations and policy implications supported by NAEP data. The panel concludes that in general, if one accepts the premise that cross-age scales are valid and useful, then NAEP cross-age scales are not technically flawed in any obvious ways. However, analyses suggest that cross-age scale comparisons are largely flawed and unhelpful. Overall, the report supports the recent decision of the National Assessment Governing Board to use within-age scales when feasible. (SLD)
Publication Type: Reports - Evaluative
Education Level: N/A
Sponsor: National Center for Education Statistics (ED), Washington, DC.
Authoring Institution: N/A
Identifiers - Assessments and Surveys: National Assessment of Educational Progress