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. 2023 May 9;15(2):e12423. doi: 10.1002/dad2.12423

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© 2023 The Authors. Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring published by Wiley Periodicals, LLC on behalf of Alzheimer's Association.

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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ALLFTD Mobile App overview and task schedule Note. Figure 1A: Participants progress through a virtual world as they complete tasks. The circle with the “+9″ indicates the number of remaining tasks. Participants press this circle to access their tasks. Figure 1B: Participants can create a personalized avatar and gems can be used to purchase accessories. Gems are received after completing each task. Figure 1C: This is an example of one of the cognitive tasks, a gamified version of the classic Flanker paradigm. Participants are asked to indicate the direction of the center duck by pressing the left or right arrow. Figure 1D: This schematic illustrates the pilot and observational study participation schedules. For an example participant starting the observational study on a Monday, Session 1 tasks are available for 3 days (Monday‐Wed) followed by a washout day during which no tasks are available (Thursday). A new set of tasks become available in Session 2 (Friday – Sunday), followed by a second washout day (Monday). The third set of tasks become available in Session 3 (Tuesday – Thursday). Note that tasks were only available for 2‐day windows in the pilot study. Pilot participants recommended a longer window to complete tasks, citing the scenario in which the 2‐day window fell on the weekend as a particular barrier to adherence.