Background
Various factors affect the successful implementation of an intervention, such as its feasibility, desirability, and perceived appropriateness [Involving people in the design and modification of interventions is recognised as an important stage in ensuring acceptability [The first limitation concerns the lack of study methods explicitly testing the acceptability of a modified intervention following participant feedback. This is important because, to our knowledge, no experimental studies have been conducted that evaluate whether changes made to an intervention in response to participant feedback elicited improvements in acceptability.The second limitation concerns the lack of use of theoretical frameworks to guide the investigation of acceptability. The Theoretical Framework of Acceptability (TFA) [