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Table 1 Six steps in development of the decision aid intervention

From: Development of a decision support intervention for family members of adults who lack capacity to consent to trials

Step in intervention development

Method used

(1) Define and understand the problem and its causes

Systematic review, content analysis, qualitative data

(2) Clarify which causal or contextual factors are malleable

Logic model

(3) Identify the change mechanism

Qualitative data

(4) Identify how to deliver the change mechanism

Qualitative data, review of current DAs

(5) Test and refine on small scale

Review by PPI and stakeholder groups

(6) Collect sufficient evidence of effectiveness to justify rigorous evaluation/implementation

Feasibility studya

  1. aFeasibility study to be conducted as part of a follow-on project