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Hybrid Model of IRT and Latent Class Models IRT

Yamamoto, Kentaro
Publication Year:
Report Number:
ETS Research Report
Document Type:
Page Count:
Subject/Key Words:
Office of Naval Research, Cognitive Measurement, Cognitive Structures, Item Response Theory (IRT), Latent Class Models, Models, Response Style (Tests), Test Theory


Concern has been increasing recently over the inability of Item Response Theory (IRT) to express cognitive structure, such as whether a response was produced by a rule of operations or a particular misunderstanding, or to give descriptive information of knowledge possessed by examinees. This lack of capability has spawned several new developments in IRT, and in latent class models as well. Many researchers of the cognitive science in the past expressed cognitive structure by a set of response vectors. Cognitive structure was inferred from the response vectors through inductive reasoning. Therefore, one or a set of response patterns is associated with a given cognitive structure. The relationship between items and cognitive structure relies heavily on task analysis. The author utilizes this method to represent a structure of cognition by a particular response vector or a set of them. (65pp.)

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