Centre for AppliedInternet Researchwww.cair-uk.org

Usability evaluation of a gesture-controlled user interface.

Monir Bhuiyan

Centre for Applied Internet Research (CAIR)Glyndŵr University, North Wales, UK

International Conference on Internet Technologies and Applications , ITA-11

September, 2011, Glyndŵr University, Wrexham

Overview of the presentation

• Introducing the research• Background• Usability evaluation• Evaluation plan• Evaluation result• Future work & conclusion

Introducing the research• Gesture Controlled Communication

Aid for Inclusive Designo Usability, framework, time & age factors

• Motivationo Modes of interaction & Usabilityo Technology evolutiono Elderly population

Gesture controlled User interface for Inclusive Design

Background

• Background o Interaction, Interface, usability, Gesture, Inclusivity

• Review study o 180 papers , 26 research related and representative projects, 9

commercial products• Findings

o GCUI Affordable o Usable for many users, so inclusive

• OpenGesture application: a prototype

Usability evaluation

• Usability (Rubin et al. 2008, Albert et al., 2010)

• GCUI Usability- Design, layout, effectiveness, efficiency, easy of use, learn ability, satisfaction

• GCUI development and usability framework o Finding Ideal place, range and distance of

interaction • Time and age factors of GCUI

Evaluation Plan

• Phaseso Pilot studyo Main evaluationo Time and age factor study

• Plano Sessions, Scenarios, Goals, Hypotheses,

Questionnaire, Participants..............

• Ethical approval

Evaluation sessions

Questionnaire and data preparation

• Likert scaleo For design, usability issues, featureo Means & standard deviation

• Rankingo Rank order average (ROA)

• Open Question, groups....o Percentage, qualitative analysis

• Tabulation

Analysis and result

• The scale of 1..5 for question responses gives us a neutral value (neither strong agree nor disagree) These figures are very similar for all age groups, indicating inclusivity.

• The ROA analysis -a rectangular menu option arrangement was preferred, closely followed by the triangular configuration. The circular menu was unpopular.

• A breadth of 4x4x4 where 4 options were positioned on a screen, with a depth of 3 screens was preferred.

• Finally, the preferred distance of 240cm from the screen.

• We also need to know- Time factor and age factor of using GCUI

Time and age factor study• Time (Fitt’s Law ) and Age factors, using the GCUI best

configuration

• Timing of the tasks by different users • Overall success rate of different users • Incorporating ability factors into the equation • Comparing with another interaction

Conclusion

• Result analysiso Not strongly agreed by the participants, nor

rejected.o The framework or the best configuration of

GCUI• Methodology

o Standard usability evaluation method and questionnaire

• GCUI can be a usable and inclusive interface.

Reference & further readingAlbert, B., Tullis, T. and Tedesco, D. (2010) Beyond the Usability Lab: Conducting Large-scale Online User experience studiesBernsen, N.O. and Dybkjær, L. (2009) Multimodal UsabilityBrinck, T., Gergle, D. and Wood, S.D. (2002) Usability for the Web: Designing Web Sites that Work Lumsden, j. (ed.) (2008) Handbook of research on user interface design and evaluation for mobile technologyNielsen, J. (1993) Usability engineering (Interactive Technologies)Perlman, G. (2009) User Interface Usability Evaluation with Web-Based QuestionnaireRubin, J.Z., Chisnell, D. and Spool, J.M. (2008) Handbook of usability testing: how to plan, design, and conduct effective testsSchaffer, E. (2004) Institutionalization of Usability: A Step-by-Step Guide

Thanks

Monir BhuiyanCentre for Applied Internet Research (CAIR) Glyndŵr University, Wrexhammonirb@live.com

Questions

Centre for AppliedInternet Researchwww.cair-uk.org