A Minimum Risk Wrapper Algorithm for Genetically Selecting Imprecisely Observed Features, Applied to the Early Diagnosis of Dyslexia

Authors:
Luciano Sánchez;Ana Palacios;Inés Couso
Affiliations:
D. Informática., Univ. Oviedo, Gijón, Asturias 33071;D. Informática., Univ. Oviedo, Gijón, Asturias 33071;D. Estadística, Univ. Oviedo, Oviedo, Asturias 33071
Venue:
HAIS '08 Proceedings of the 3rd international workshop on Hybrid Artificial Intelligence Systems
Year:
2008

Citing 3
Cited 0

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Abstract

A wrapper-type evolutionary feature selection algorithm, able to use imprecise data, is proposed. This algorithm is based on a new definition of a minimum Bayesian risk k-NN estimator for vague data. Our information about the risk is assumed to be fuzzy. Therefore, the risk is minimized by means of a modified multicriteria Genetic Algorithm, able to optimize fuzzy valued fitness functions.Our algorithm has been applied to interval-valued data, collected in a study about the early diagnosis of dyslexia. We were able to select a low number of tests that are relevant for the diagnosis, and compared this selection of factors to those sets obtained by other crisp and imprecise data-based feature selection algorithms.