Rules for contrast sets

Article type: Research Article

Authors: Azevedo, Paulo J.

Affiliations: CCTC, Departamento de Informática, Campus de Gualtar, Universidade do Minho, 4710-057 Braga, Portugal. E-mail: [email protected]

Abstract: In this paper we present a technique to derive rules describing contrast sets. Contrast sets are a formalism to represent groups differences. We propose a novel approach to describe directional contrasts using rules where the contrasting effect is partitioned into pairs of groups. Our approach makes use of a directional Fisher Exact Test to find significant differences across groups. We used a Bonferroni within-search adjustment to control type I errors and a pruning technique to prevent derivation of non significant contrast set specializations.

Keywords: Contrast Sets, association rules, Fisher exact test, Bonferroni adjustment

DOI: 10.3233/IDA-2010-0444

Journal: Intelligent Data Analysis, vol. 14, no. 6, pp. 623-640, 2010