title: Fisher's information function and Rasch measurement.
abstract: Fisher's information function is reviewed with respect to an example he used for explication. A contemporary example continues the discussion with application to a rating scale instrument. The relationship of information to precision and measurement error is presented and discussed with respect to the analysis of fit. Targeting the instrument and the best test design for measuring a person with respect to information and item-person fit is discussed. The idealization of information and precision for making measures appears most effectively realized when computerized assisted testing can be employed to implement a best test design.
authors.affiliation: Aurora University. markhstone@sbcglobal.net
authors.forename: Mark H
authors.initials: MH
authors.lastname: Stone
mesh_terms: D000465:Algorithms; D003627:Data Interpretation, Statistical; D006801:Humans; D011594:Psychometrics / Q000706:statistics & numerical data*; D011795:Surveys and Questionnaires / Q000592:standards*