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Identification problems in latent trait models
Author(s) -
Moran P. A. P.
Publication year - 1986
Publication title -
british journal of mathematical and statistical psychology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.157
H-Index - 51
eISSN - 2044-8317
pISSN - 0007-1102
DOI - 10.1111/j.2044-8317.1986.tb00857.x
Subject(s) - trait , identification (biology) , mathematics , econometrics , statistics , computer science , biology , ecology , programming language
It is shown that in the two‐parameter Birnbaum latent trait model, all the parameters are identifiable under wide conditions, provided the number of items exceeds two, and all the slopes are strictly positive.