Table 2.

Summary of iterative development process presented in rounds 1 and 2.

Round	Description of prototype	Primary areas for refinement
1	Presentation: participants were presented with a low-fidelity prototype of the MouvMat, which consisted of 4 modular gaming squares. Each square was made of polyethylene terephthalate plastic with 59 RGBa LEDs embedded and distributed in 6 parallel rows of 7 to 11 LEDs each, with no alignment of columns. Each square contained its own pressure sensor and was wired to an Arduino. Thus, there were multiple wires connecting each square to the Arduino Each side of the square measured approximately 28 cm (11 inches). A nonslip backing was on each square Programming: there were no games programmed into the interface because this first stage was to identify whether this type of platform would be tolerated by the residents. The lights were manually activated by a team member to emulate game play to see how residents interacted with this gaming format Audio: none Pressure sensors: none Peripheral accessory: wheel-bound participants were given a wooden stick with a circular platform at the end to use as the accessory Image of prototype used in round 1	Participants did not like the multiple wires (because of fall risk) Requested to hear sounds for audio feedback Participants found it difficult to envision a game and wanted to experience playing a game The wooden stick provided to residents to emulate the peripheral device was reported by residents to be a little heavy and needed a larger surface area at the bottom to activate the squares
2	Presentation: 4 acrylic (polymethyl methacrylate) squares that were all centrally connected to the Arduino. There were 6 to 10 parallel rows of 7 to 11 LEDs in each row. Each side of the square measured approximately 28 cm (11 inches). A nonslip material was on the back of each square Programming: there was one game programmed similar to Simon Says programmed on the Arduino Audio: basic audio chimes played over a mid–low-fidelity speaker when the squares were activated. There were also short music clips that would play upon the successful completion of a sequence Pressure sensors: Velostat sheet (polymeric foil) Peripheral accessory: wheelchair-bound participants were given a plastic stick with a circular platform on a swiveling head to use as the accessory Image of prototype used in round 2	Participants suggested more squares for a bigger play space to experience more gaming options Some shoes were extending over the border of the square, so we needed larger squares to accommodate size 12 shoes Residents wanted to see more games The accessory’s circular platform was too heavy and not long enough according to residents The basic audio chimes that were added were not motivating enough The game was not responsive enough—the squares had to be stepped on multiple times to activate Staff identified that lifting the stack of squares would be a bit too heavy if they had to carry the squares from one recreation room to another room or unit From a development perspective, the programming of the games was time consuming, and we found the single Arduino was fragile and hard to upgrade

^aRGB: red, green, blue.