Causal Rasch models

被引:39
|
作者
Stenner, A. Jackson [1 ,2 ]
Fisher, William P., Jr. [3 ]
Stone, Mark H. [4 ]
Burdick, Donald S. [1 ]
机构
[1] MetaMetrics Inc, Durham, NC 27713 USA
[2] Univ N Carolina, Sch Educ, Chapel Hill, NC 27599 USA
[3] Univ Calif Berkeley, Grad Sch Educ, Berkeley, CA 94720 USA
[4] Aurora Univ, Dept Psychol, Aurora, IL USA
来源
FRONTIERS IN PSYCHOLOGY | 2013年 / 4卷
关键词
causality; models; prediction; assessment; reading ability; Rasch models; quantification; construct validity; PATHOLOGICAL SCIENCE; CONSEQUENCE; REVOLUTION;
D O I
10.3389/fpsyg.2013.00536
中图分类号
B84 [心理学];
学科分类号
04 ; 0402 ;
摘要
Rasch's unidimensional models for measurement show how to connect object measures (e.g., reader abilities), measurement mechanisms (e.g., machine-generated cloze reading items), and observational outcomes (e.g., counts correct on reading instruments). Substantive theory shows what interventions or manipulations to the measurement mechanism can be traded off against a change to the object measure to hold the observed outcome constant. A Rasch model integrated with a substantive theory dictates the form and substance of permissible interventions. Rasch analysis, absent construct theory and an associated specification equation, is a black box in which understanding may be more illusory than not. Finally, the quantitative hypothesis can be tested by comparing theory-based trade-off relations with observed trade-off relations. Only quantitative variables (as measured) support such trade-offs. Note that to test the quantitative hypothesis requires more than manipulation of the algebraic equivalencies in the Rasch model or descriptively fitting data to the model. A causal Rasch model involves experimental intervention/manipulation on either reader ability or text complexity or a conjoint intervention on both simultaneously to yield a successful prediction of the resultant observed outcome (count correct). We conjecture that when this type of manipulation is introduced for individual reader text encounters and model predictions are consistent with observations, the quantitative hypothesis is sustained.
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页数:14
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