ERIC Number: EJ920196
Record Type: Journal
Publication Date: 2011
Reference Count: 7
"The Role of the Unit in Physics and Psychometrics": A Commentary
Dunne, Timothy T.
Measurement: Interdisciplinary Research and Perspectives, v9 n1 p36-39 2011
The challenge for a discussant of the Humphry article in this issue is that the profundity of the simple insights of the article, and the lucid arguments by which the insights are sustained, might be easily overlooked, undervalued, or misconstrued. At the risk of repeating major inferences already presented, one may note that the article represents a major consolidation of ideas within the Rasch measurement model paradigm on several fronts. The article renders explicit the role of the implicit unit of measurement within any frame of reference tentatively described by the conventional one-parameter logistic (1PL) or Rasch measurement model. The 1PL model is a working hypothesis, but subject to well-known tests of adequacy and goodness-of-fit of a conventional statistical type. The implications of the article are manifold. At one level it provides substantial machinery for equating of diverse probe instruments in desired educational, psychometric, and sociometric measurement settings. It should open fresh dialogue between proponents of two-parameter logistic (2PL) models and of conventional Rasch approaches.
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Publication Type: Journal Articles; Opinion Papers
Education Level: N/A
Authoring Institution: N/A