“…Of these, seven were RCTs. [29][30][31][32][34][35][36] One study used strong control, that is, comparing the intervention to groupbased exercise 35 whilst Hong et al 30 Interventions used robotic pets, 41,43,45,[48][49][50] social robots, 44 tablets for apps or videos, 46,47,54 videoconferences (Van der 53 ), virtual reality technology, 42,51,52 and light therapy. 55 Study duration was 4 months or shorter, except Chu et al 44 who followed up after 5 years.…”