Financial decision-making is critical to adult autonomy, yet many adults with Down syndrome (AwDS) have limited opportunities or support to develop money management skills, often receiving allowances while caregivers oversee financial obligations. To better understand the experiences AwDS have with budgeting and their support preferences, we designed and prototyped three cash-based budgeting technology probes: a gamified tablet application, a tablet-based augmented reality application, and a custom tangible device. Seven AwDS used all three prototypes to complete simplified money management tasks. Across probes, modality tradeoffs shaped engagement and checking: gamification increased interest but encouraged rushing; AR reduced arithmetic but encouraged users to trust the system’s output and skip verification; tangible controls supported participation yet introduced coordination challenges. Error recovery relied on brief, situated prompts linking screen and cash, shaped by prior budgeting/technology experience. These findings point to three design implications: (1) surface budgeting as a stimulating multi-goal puzzle, not just a sequence of steps; (2) design error recovery that connects screen state and real money; (3) support interdependent use without collapsing autonomy.
ACM CHI Conference on Human Factors in Computing Systems