Classification ensembles for multivariate functional data with application to mouse movements in web surveys

• URL: http://arxiv.org/abs/2205.13380v1
• Date: Thu, 26 May 2022 14:12:24 GMT
• Title: Classification ensembles for multivariate functional data with application to mouse movements in web surveys
• Authors: Amanda Fern\'andez-Fontelo and Felix Henninger and Pascal J. Kieslich and Frauke Kreuter and Sonja Greven
• Abstract summary: We propose new ensemble models for multivariate functional data classification as combinations of weak learners. We apply these ensemble models to identify respondents' difficulty with survey questions, with the aim to improve survey data quality.
• Score: 3.6944296923226316
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We propose new ensemble models for multivariate functional data classification as combinations of semi-metric-based weak learners. Our models extend current semi-metric-type methods from the univariate to the multivariate case, propose new semi-metrics to compute distances between functions, and consider more flexible options for combining weak learners using stacked generalisation methods. We apply these ensemble models to identify respondents' difficulty with survey questions, with the aim to improve survey data quality. As predictors of difficulty, we use mouse movement trajectories from the respondents' interaction with a web survey, in which several questions were manipulated to create two scenarios with different levels of difficulty.

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