THE IMPORTANCE OF HUMAN MENTAL WORKLOAD IN WEB DESIGN

Luca Longo, Fabio Rusconi, Lucia Noce, Stephen Barrett

Abstract

The focus of this study is the introduction of the construct of Human Mental Workload (HMW) in Web design, aimed at supporting current interaction design practices. An experiment has been conducted using the original Wikipedia and Google web-interfaces, and using two slightly different versions. Three subjective psychological mental workload assessment techniques (NASA-TLX, Workload Profile and SWAT) with a well-established assessments usability tool (SUS) have been adopted. T-tests have been performed to study the statistical significance of the original and modified web-pages, in terms of workload required by typical tasks and perceived usability. Preliminary results show that, in one ideal case, increments of usability correspond to decrements of generated workload, confirming the negative impact of the structural changes on the interface. In another case, changes are significant in terms of usability but not in terms of generated workloads, thus raising research questions and underlying the importance of Human Mental Workload in Interaction Design.

References

  1. Albers, M. (2011). Tapping as a Measure of Cognitive Load and Website Usability. Proceedings of the 29th ACM international conference on Design of communication, pages 25-32.
  2. Bangor, A., Kortum, P., and Miller, J. (2008). An empirical evaluation of the System Usability Scale (SUS). International Journal of Human-Computer Interaction, 24(6):574594.
  3. Brook, J. (2008). SUS. A quick and dirty usability scale. International Journal of Human-Computer Interaction, 24(6):574594.
  4. Cain, B. (2007). A Review of the Mental Workload Literature. Technical Report, Defence Research and Development.
  5. Donnell, R. O. and Eggemeier, F. (1998). Modeling mental workload. Cognitive Technology, 3:9-31.
  6. Gopher, D. and Donchin, E. (1986). Mental Workload Dynamics in Adaptive Interface Design. Handbook of Perception and Human Performance, 2(41):1-49.
  7. Gwizdka, J. (2009a). Assessing Cognitive Load on Web Search Tasks. Ergonomics Open Journal, 2:114-123.
  8. Gwizdka, J. (2009b). Distribution of Cognitive Load in Web Search. Journal of the American Society for Information Science & Technology, 61(11):2167-2187.
  9. Hancock, P. and Meshkati, N. (1988). Human Mental Workload. Elsevier.
  10. Hart, S. G. (2006). Nasa-Task Load Index (Nasa-Tlx); 20 Years Later. Human Factors and Ergonomics Society Annual Meeting Proceedings, 50(9):904-908.
  11. Kantowitz, B. (1988). Development of Nasa-TLX (Task Load Index): Results of Empirical and Theoretical Research. Human Mental Workload, 52:139-183.
  12. Kramer, A. and Sirevaag, E. (1987). A Psychophysiological Assessment of Operator Workload During Simulated Flight Missions. Human Factors, 29(2):145-160.
  13. Luximon, A. and Goonetilleke, R. S. (2001). Simplified subjective workload assessment technique. Ergonomics, 44(3):229-243.
  14. Tracy, J. P. and Albers, M. J. (2006). Measuring Cognitive Load to Test the Usability of Web Sites. Usability and Information Design, pages 256-260.
  15. Tsang, P. and Velazquez, V. (1996). Diagnosticity and multidimensional subjective workload ratings. Ergonomics, 39(3):358-381.
  16. Wickens, C. (1987). Information processing, decision making, and cognition. Cognitive engineering in the design of humancomputer interaction and expert systems.
  17. Xie, B. and Salvendy, G. (2000). Prediction of Mental Workload in Single and Multiple Task Environments. International Journal of Cognitive Ergonomics, 4(3):213-242.
  18. Young, M. and Stanton, N. (2001). Mental Workload: Theory, Measurement, and Application. International Encyclopedya of Ergonomics and Human Factors, 1:507-509.
  19. Zhu, H. and Hou, M. (2009). Restrain mental workload with roles in hci. In Proceedings of Science and Technology for Humanity, pages 387 - 392.
Download


Paper Citation


in Harvard Style

Longo L., Rusconi F., Noce L. and Barrett S. (2012). THE IMPORTANCE OF HUMAN MENTAL WORKLOAD IN WEB DESIGN . In Proceedings of the 8th International Conference on Web Information Systems and Technologies - Volume 1: WEBIST, ISBN 978-989-8565-08-2, pages 403-409. DOI: 10.5220/0003960204030409


in Bibtex Style

@conference{webist12,
author={Luca Longo and Fabio Rusconi and Lucia Noce and Stephen Barrett},
title={THE IMPORTANCE OF HUMAN MENTAL WORKLOAD IN WEB DESIGN},
booktitle={Proceedings of the 8th International Conference on Web Information Systems and Technologies - Volume 1: WEBIST,},
year={2012},
pages={403-409},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0003960204030409},
isbn={978-989-8565-08-2},
}


in EndNote Style

TY - CONF
JO - Proceedings of the 8th International Conference on Web Information Systems and Technologies - Volume 1: WEBIST,
TI - THE IMPORTANCE OF HUMAN MENTAL WORKLOAD IN WEB DESIGN
SN - 978-989-8565-08-2
AU - Longo L.
AU - Rusconi F.
AU - Noce L.
AU - Barrett S.
PY - 2012
SP - 403
EP - 409
DO - 10.5220/0003960204030409