caa a22 4500 605469253 CHVBK 20210128100321.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s00500-014-1325-6 doi (NATIONALLICENCE)springer-10.1007/s00500-014-1325-6 Data-based prediction of sentiments using heterogeneous model ensembles [Elektronische Daten] [Stephan Winkler, Susanne Schaller, Viktoria Dorfer, Michael Affenzeller, Gerald Petz, Michał Karpowicz] In this paper, we present an ensemble modeling approach for sentiment analysis using machine learning algorithms. The main goal of sentiment analysis is to develop estimators that are able to identify the sentiment orientation (positive, negative, or neutral) of sentences found in any arbitrary source. The novel approach presented here relies on the analysis of the words found in sentences and the formation of large sets of heterogeneous models, i.e., binary as well as multi-class classification models that are calculated by various different machine learning methods; these models shall represent the relationship between the presence of given words (or combination of words) and sentiments. All models trained during the learning phase are applied during the test phase and the final sentiment assessment is annotated with a confidence value that specifies, how reliable the models are regarding the presented decision. In the empirical part of this paper, we show results achieved using a German corpus of Amazon recensions and a set of machine learning methods (decision trees and adaptive boosting, Gaussian processes, random forests, k-nearest neighbor classification, support vector machines and artificial neural networks with evolutionary feature and parameter optimization, and genetic programming). Using a heterogeneous model ensemble learning approach that combines multi-class classifiers as well as binary classifiers, the classification accuracy can be increased significantly and the ratio of totally wrongly classified samples (i.e., those that are assigned to the completely opposite sentiment orientation) can be decreased significantly. Springer-Verlag Berlin Heidelberg, 2014 Sentiment analysis nationallicence Machine learning nationallicence Heterogeneous model ensembles nationallicence Evolutionary computation nationallicence Winkler Stephan Heuristic and Evolutionary Algorithms Laboratory, Bioinformatics Research Group, University of Applied Sciences Upper Austria, Hagenberg, Austria aut Schaller Susanne Heuristic and Evolutionary Algorithms Laboratory, Bioinformatics Research Group, University of Applied Sciences Upper Austria, Hagenberg, Austria aut Dorfer Viktoria Heuristic and Evolutionary Algorithms Laboratory, Bioinformatics Research Group, University of Applied Sciences Upper Austria, Hagenberg, Austria aut Affenzeller Michael Heuristic and Evolutionary Algorithms Laboratory, Bioinformatics Research Group, University of Applied Sciences Upper Austria, Hagenberg, Austria aut Petz Gerald Department of Marketing and Electronic Business, University of Applied Sciences Upper Austria, Steyr, Austria aut Karpowicz Michał Department of Marketing and Electronic Business, University of Applied Sciences Upper Austria, Steyr, Austria aut Soft Computing Springer Berlin Heidelberg 19/12(2015-12-01), 3401-3412 1432-7643 19:12<3401 2015 19 500 https://doi.org/10.1007/s00500-014-1325-6 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00500-014-1325-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Winkler Stephan Heuristic and Evolutionary Algorithms Laboratory, Bioinformatics Research Group, University of Applied Sciences Upper Austria, Hagenberg, Austria aut NATIONALLICENCE 700 1- Schaller Susanne Heuristic and Evolutionary Algorithms Laboratory, Bioinformatics Research Group, University of Applied Sciences Upper Austria, Hagenberg, Austria aut NATIONALLICENCE 700 1- Dorfer Viktoria Heuristic and Evolutionary Algorithms Laboratory, Bioinformatics Research Group, University of Applied Sciences Upper Austria, Hagenberg, Austria aut NATIONALLICENCE 700 1- Affenzeller Michael Heuristic and Evolutionary Algorithms Laboratory, Bioinformatics Research Group, University of Applied Sciences Upper Austria, Hagenberg, Austria aut NATIONALLICENCE 700 1- Petz Gerald Department of Marketing and Electronic Business, University of Applied Sciences Upper Austria, Steyr, Austria aut NATIONALLICENCE 700 1- Karpowicz Michał Department of Marketing and Electronic Business, University of Applied Sciences Upper Austria, Steyr, Austria aut NATIONALLICENCE 773 0- Soft Computing Springer Berlin Heidelberg 19/12(2015-12-01), 3401-3412 1432-7643 19:12<3401 2015 19 500