“…Results of the meta-analysis. Type T1 T2 T3 T4 T5 T6 T7 T8 TangiSense (Traffic) [50] System, no user evaluation X X X Active Forms [52] Theoretical X X X X AwareKit [53] System, user evaluation X X X X X CapNFC [45] System, no user evaluation X X X X Cognitive Objects [54] Theoretical X X X X Smart-home environment [55] System, user evaluation X X X TANGerINE [56] System, no user evaluation X X X X Expressing Intent [57] System, no user evaluation X X X X X VoxBox [43] System, user evaluation X X X X Invisible connections [44] Theoretical, user interviews X X X X IoT Owl [58] System, no user evaluation X X X Iyagi [59] System, no user evaluation X X TangiSense (Kitchen) [60] System, user evaluation X X Projected interfaces [61] System, no user evaluation X X X X RapIoT [62] Toolkit X X T4Tags [63] Toolkit, end-user insights X X X X X Technology Individuation [42] Theoretical, analysis of user-evaluated systems X X X X X X X Tiles [64] Toolkit X X X X X Total: 18 papers 4 theoretical, 3 toolkits, 11 systems. 7 papers include user insights 13 10 1 12 11 11 7 4 From the table, it is possible to notice that the most cited property is T1, with 13 occurrences out of 18 articles, while T3, i.e., exploring persistency of tangible interfaces, is the less mentioned (in only one paper and marginally).…”