2005/01/01 by Gwénaël Le Teuff, G. Le Teuff, Alain Venot +6
Computer Science · Decision Sciences · Mathematics · #Imbalanced Data Classification Techniques #Reliability and Agreement in Measurement #Statistical Methods in Epidemiology
paper · doi:10.1055/s-0038-1634028
crossref issued 2005/01/01 · crossref published 2005/01/01 · crossref published-print 2005/01/01 · openalex publication_date 2005/01/01 · openalex created_date 2016/06/24 · crossref published-online 2018/02/07 · crossref created 2018/03/20 · crossref deposited 2018/03/20 · crossref indexed 2026/07/26 · openalex updated_date 2026/08/04
OBJECTIVE: Recent results published by Coste et al. in discriminant analysis with ordinal responses showed the superiority of optimal discriminating analysis for ordinal responses (ODAO) both in terms of classification and simplicity of implementation compared to classic methods (Fisher's discrimination, logistic regression) applied to medical data (prognostics of burns) and to simulated data. Nevertheless, the solutions obtained by ODAO may be sensitive to re-sampling (i.e the estimated coefficients by ODAO may show excessive sensitivity to the training sample). This study proposes some solutions to control the fluctuations of sampling and to ensure model stability. METHODS: We used intensive computational methods and bootstrapping, at the outset of model building in order to reduce the sampling variability of estimated coefficients. Thus, the estimation of the coefficients was not based on the minimization of a classification criterion of the training sample, but on the minimization of an aggregate criterion of bootstrapped replications of a classification criterion. Five aggregate criteria were studied. RESULTS: The improvement in terms of robustness appeared in 30% of the test cases with moderate training sample size and 55% of those with small training sample size. CONCLUSION: Simulated test cases showed that bootstrapping can help construct more robust models in difficult classification situations and small training samples which are particularly frequent.