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Developing a Wayfinding Application for Individuals with Cognitive Impairments

People with cognitive impairments need assistance in navigating to the places they need to visit throughout their day. We are creating a wayfinding system through a continuing, iterative process involving design, prototyping, and evaluation.

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Developing a Wayfinding Application for Individuals with Cognitive Impairments

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  1. People with cognitive impairments need assistance in navigating to the places they need to visit throughout their day. We are creating a wayfinding system through a continuing, iterative process involving design, prototyping, and evaluation. Developing a Wayfinding Application for Individuals with Cognitive Impairments Indoor Study (n=7) • Diverse set of participants used a Wizard of Oz system to navigate 3 indoor routes • Used 3 sets of modalities: image+audio, image+text, and image+text+audio • Results • All participants successfully followed directions to destinations • Wide range of preference for modalities and expectation of when directions should be given Outdoor Study 1 (n=6) • Examine whether outdoor environments alter usability of the different types of directions • Compare against baseline (no system) situation • Results • 5 of 6 participants struggled to navigate in baseline • Photo visibility was an issue at times, but were still helpful in many cases • Environment did not distract participants, but at times they focused too much on system Outdoor Study 2 (n=9) • Examine the use of different types of landmarks for wayfinding and effect of landmark orientation to understandability • Results • Perspective photos were less likely to be involved in wayfinding difficulties or be misinterpreted (p<0.01) • Road and sculptures were less error-prone than buildings (p<0.01) • Walking toward a landmark was less error-prone than keeping it on the side or walking away from it (p<0.05) Ongoing Work • Developing a system to generate customizable and adaptable wayfinding directions • Model user preference and behavior using Markov decision process (MDP) framework • Include personalized factors when factoring direction costs, e.g., physical effort and safety • Create a route plan that minimizes the cost to navigate to the destination • Observe user behavior to adjust likelihoods and weights Alan Liu (UW CSE) Harlan Hile (UW CSE) Gaetano Borriello (UW CSE) Henry Kautz (U. of Rochester) Pat Brown (UW Rehab Med) Mark Harniss (UW Rehab Med) Kurt Johnson (UW Rehab Med)

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