“…Adaptation of content for individual dyads, 12,22,25,33 ensuring the intervention is deliverable, 14,18,19,23,25,31 flexibility in when dyads were able to carry out the activities, 10 and easy to use 24 were key factors for change associated with implementation. - Mechanisms of impact : A very commonly identified mechanism of impact in 15 out of 24 evaluations was the importance of providing support for the carer of the PLWD, whether from facilitators or peers. Interventions that had an element of support for carers, either online, 24,27 face‐to‐face, 15,30,31 attending support groups with facilitators and/or peers, 10,11,13,14 or by individual or group counselling or therapy sessions, 10,13,14,27,33 or included social interactions, 32 benefitted dyads. Another key mechanism of impact was participants' engagement with the intervention; high engagement and enjoyment by dyads facilitated change, 14–17,29–31,33 and low engagement and low enjoyment was a barrier 14,15,24 .
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