Indoor wayfinding:: developing a functional interface for individuals with cognitive impairments

ABSTRACT

Assistive technology for wayfinding will significantly improve the quality of life for many individuals with cognitive impairments. The user interface of such a system is as crucial as the underlying implementation and localization technology. We built a system using the Wizard-of-Oz technique that let us experiment with many guidance strategies and interface modalities. Through user studies, we evaluated various configurations of the user interface for accuracy of route completion, time to completion, and user preferences. We used a counter-balanced design that included different modalities (images, audio, and text) and different routes. We found that although users were able to use all types of modalities to find their way indoors, they varied significantly in their preferred modalities. We also found that timing of directions requires careful attention, as does providing users with confirmation messages at appropriate times. Our findings suggest that the ability to adapt indoor wayfinding devices for specific users' preferences and needs will be particularly important.

REFERENCES

• 1: P. Brown, M. Harniss, and K. Johnson. Cognitive support technologies: Implications for design and user interface. In Proc. of the Intl Conf on Technology and Persons with Disabilities, 2006.
• 2: Waylon Brunette , Jonathan Lester , Adam Rea , Gaetano Borriello, Some sensor network elements for ubiquitous computing, Proceedings of the 4th international symposium on Information processing in sensor networks, April 24-27, 2005, Los Angeles, California
• 3: Stefan Carmien , Melissa Dawe , Gerhard Fischer , Andrew Gorman , Anja Kintsch , James F. Sullivan, JR., Socio-technical environments supporting people with cognitive disabilities using public transportation, ACM Transactions on Computer-Human Interaction (TOCHI), v.12 n.2, p.233-262, June 2005 [doi>10.1145/1067860.1067865]
• 4: T. U. D. D. Center. The final report on the 1990 natl consumer survey of people with developmental disabilities and their families, 1990.
• 5: Keith Cheverst , Nigel Davies , Keith Mitchell , Adrian Friday , Christos Efstratiou, Developing a context-aware electronic tourist guide: some issues and experiences, Proceedings of the SIGCHI conference on Human factors in computing systems, p.17-24, April 01-06, 2000, The Hague, The Netherlands [doi>10.1145/332040.332047]
• 6: R. Golledge. Wayfinding behavior: Cognitive mapping and other spatial processes. John Hopkins University Press, 1999.
• 7: Jeffrey Hightower , Gaetano Borriello, Location Systems for Ubiquitous Computing, Computer, v.34 n.8, p.57-66, August 2001 [doi>10.1109/2.940014]
• 8: Auli Lepistö , Saila Ovaska, Usability evaluation involving participants with cognitive disabilities, Proceedings of the third Nordic conference on Human-computer interaction, p.305-308, October 23-27, 2004, Tampere, Finland [doi>10.1145/1028014.1028061]
• 9: L. Liao, D. Fox, and H. Kautz. Learning and inferring transportation routines. In Proc of the 19th Natl Conf on AI, 2004.
• 10: Gary Look , Buddhika Kottahachchi , Robert Laddaga , Howard Shrobe, A location representation for generating descriptive walking directions, Proceedings of the 10th international conference on Intelligent user interfaces, January 10-13, 2005, San Diego, California, USA [doi>10.1145/1040830.1040862]
• 11: E. F. LoPresti, A. Mihailidis, and N. Kirsch. Assistive technology for cognitive rehabilitation: State of the art. Neuropsychological Rehabilitation, 14(1/2):5--39, 2004.
• 12: K. Lynch. The Image of the City. MIT Press, 1960.
• 13: F. Paas, A. Renkl, and J. Sweller. Cognitive load theory and instructional design: Recent developments. Educational Psychologist, 38(1):1--4, 2003.
• 14: D. J. Patterson, L. Liao, K. Gajos, M. Collier, N. Livic, K. Olson, S. Wang, D. Fox, and H. Kautz. Opportunity knocks: a system to provide cognitive assistance with transportation services. In Proc of the 6th Intl Conf on Ubiquitous Computing, 2004.
• 15: M. E. Pollack, L. Brown, D. Colbry, C. Orosz, B. Peintner, S. Ramakrishnan, S. Engberg, J. T. Matthews, J. Dunbar-Jacob, and C. E. McCarthy. Pearl: Mobile robotic assistant for the elderly. In AAAI Workshop on Automation as Eldercare, pages 85--92, 2002.
• 16: Daniel Salber , Joëlle Coutaz, A Wizard of Oz platform for the study of multimodal systems, INTERACT '93 and CHI '93 conference companion on Human factors in computing systems, p.95-96, April 24-29, 1993, Amsterdam, The Netherlands [doi>10.1145/259964.260126]
• 17: M. Sohlberg, B. Todis, S. Fickas, P. Hung, and R. Lemoncello. A profile of community navigation in adults with chronic cognitive impairments. Brain Injury, 19(14):1249--1259, Dec 2005.
• 18: A. Sutcliffe, S. Fickas, M. Sohlberg, and L. Ehlhardt. Investigating the usability of assistive user interfaces. Interacting with Computers, 15(4):577--602, Aug 2003.
• 19: B. Tversky and P. Lee. Pictorial and verbal tools for conveying routes, pages 51--64. Springer, 1999.

INDEX TERMS

Primary Classification:
  H. Information Systems
  H.5 INFORMATION INTERFACES AND PRESENTATION (I.7)
      H.5.2 User Interfaces (D.2.2, H.1.2, I.3.6)
          Subjects: Evaluation/methodology

Additional Classification:
  H. Information Systems
  H.5 INFORMATION INTERFACES AND PRESENTATION (I.7)
      H.5.2 User Interfaces (D.2.2, H.1.2, I.3.6)
          Subjects: Prototyping; Auditory (non-speech) feedback; Screen design (e.g., text, graphics, color); User-centered design

  K. Computing Milieux
  K.4 COMPUTERS AND SOCIETY
      K.4.2 Social Issues
          Subjects: Assistive technologies for persons with disabilities

General Terms:
Design, Human Factors

Keywords:
cognitive disability, ubiquitous computing, user interface, wizard-of-oz