Implementation of Dynamic Lycra® Orthoses for Arm Rehabilitation in the Context of a Randomised Controlled Feasibility Trial in Stroke: A Qualitative study Using Normalisation Process Theory.

Ambivalence interfered with implementation - but only to an extent. 'Good-enough' coherence, cognitive participation, collective action and reflexive monitoring were sufficient to initiate normalisation - as long as implementation did not undermine the relationship between practitioner and stroke survivor. Ambivalence stemmed from practitioners' uncertainty about the intervention theory and mechanisms of action. Making intervention mechanisms of action more explicit to practitioners may influence how they implement and adapt a research intervention, and may determine whether those processes undermine or enhance outcomes.