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Ergonomic Considerations for the Design and the Evaluation of Uncertain Data Visualizations

  • Sabine TheisEmail author
  • Christina Bröhl
  • Matthias Wille
  • Peter Rasche
  • Alexander Mertens
  • Emma Beauxis-Aussalet
  • Lynda Hardman
  • Christopher M. Schlick
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9734)

Abstract

Uncertainty impacts many crucial issues the world is facing today – from climate change prediction, to scientific modelling, to the interpretation of medical data. Decisions typically rely on data which can be aggregated from different sources and further transformed using a variety of algorithms and models. Such data processing pipelines involve different types of uncertainty. As visual data representations are able to mediate between human cognition and computational models, a trustworthy conveyance of data characteristics requires effective representations of uncertainty which take productivity and cognitive abilities, as important human factors, into account. We summarize findings resulting from prior work on interactive uncertainty visualizations. Subsequently, an evaluation study is presented which investigates the effect of different visualizations of uncertain data on users’ efficiency (time, error rate) and subjectively perceived cognitive load. A table, a static graphic, and an interactive graphic containing uncertain data were compared. The results of an online study (N = 146) showed a significant difference in the task completion time between the visualization type, while there are no significant differences in error rate. A non-parametric K-W test found a significant difference in subjective cognitive load [H (2) = 7.39, p < 0.05]. Subjectively perceived cognitive load was lower for static and interactive graphs than for the numerical table. Given that the shortest task completion time was produced by a static graphic representation, we recommend this for use cases in which uncertain data are to be used time-efficiently.

Keywords

Visualization Uncertainty Ergonomics Efficiency Cognitive load 

Notes

Acknowledgements

This publication is part of the research project “TECH4AGE”, funded by the German Federal Ministry of Education and Research (BMBF, Grant No. 16SV7111) supervised by the VDI/VDE Innovation + Technik GmbH.

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Sabine Theis
    • 1
    Email author
  • Christina Bröhl
    • 1
  • Matthias Wille
    • 1
  • Peter Rasche
    • 1
  • Alexander Mertens
    • 1
  • Emma Beauxis-Aussalet
    • 2
  • Lynda Hardman
    • 2
  • Christopher M. Schlick
    • 1
  1. 1.Institute of Industrial Engineering and ErgonomicsRWTH Aachen UniversityAachenGermany
  2. 2.Centrum voor Wiskunde en Informatica (CWI)AmsterdamThe Netherlands

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