How do the diffusion of innovations model and RE-AIM help plan and evaluate health promotion action?
Apply the diffusion of innovations model and the RE-AIM framework to plan, implement and evaluate health promotion action for collective resilience
A QCE Health Unit 4 answer on the diffusion of innovations model and the RE-AIM framework, covering how new health behaviours spread, how to evaluate reach and maintenance, and how to apply both to a campaign.
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What this dot point is asking
Units 3 and 4 use the diffusion of innovations model and the RE-AIM framework alongside the Ottawa Charter to plan and evaluate health promotion. QCAA wants you to apply these models, not just name them: use diffusion to explain how a new behaviour or norm spreads through a population, and use RE-AIM to evaluate whether a campaign actually worked and lasted. "Apply" means mapping each model onto a real campaign and using it to make planning or evaluation judgements.
The answer
The diffusion of innovations model
The diffusion of innovations model explains how a new idea, behaviour or product spreads through a population over time. People adopt at different rates, usually grouped as:
- Innovators, the first to try something new.
- Early adopters, respected opinion leaders who try it next.
- Early majority, who adopt once they see it working.
- Late majority, who adopt under social pressure once it is common.
- Laggards, the last to adopt.
The practical lesson for health promotion is that you do not have to convince everyone at once. If you reach innovators and early adopters, especially trusted opinion leaders, a new norm can spread through the early and late majority on its own. The speed of diffusion also depends on how the innovation is perceived: its relative advantage, how compatible it is with existing values, how simple it is, whether people can trial it, and whether its benefits are observable. Designing a behaviour to score well on these features speeds its uptake.
The RE-AIM framework
RE-AIM is an evaluation framework with five dimensions:
- Reach: how many of the target population the program actually reached, and how representative they were.
- Effectiveness: the size and balance of positive and negative outcomes.
- Adoption: how many settings or organisations took the program up.
- Implementation: how faithfully and consistently the program was delivered.
- Maintenance: whether effects and the program itself were sustained over time.
RE-AIM stops you from judging a campaign on a single flashy outcome. A campaign that reaches few people, is delivered inconsistently, or fades after launch fails on RE-AIM even if its message was clever.
Using the two models together
The models complement each other. Diffusion helps you plan: target opinion leaders and design the behaviour to be easy to adopt so a new norm spreads. RE-AIM helps you evaluate: check whether the campaign reached a representative group, worked, was adopted by settings, was delivered as intended, and lasted. Used together they cover the full cycle of building collective resilience: getting a healthy norm to spread and then verifying it stuck.
Applying to a campaign
Take a campaign promoting respectful relationships in the post-schooling transition. Diffusion guides you to recruit respected peers as early adopters and to make the behaviour visible and easy. RE-AIM then frames your evaluation: did the campaign reach a representative slice of the cohort, did distress or risk measures improve, did organisations adopt it, was it delivered consistently, and did the norm persist after the launch? Answering with evidence against each dimension is high-value in the IA1 action research and the investigation.
Exam-style practice questions
Practice questions written in the style of QCAA exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
2023 QCAAEvaluate the Post-schooling transition (PST) program for its ability to impact respectful relationships in the post-schooling transition. Reflect on the uptake of the PST program and justify the methodology and resources required to strengthen diffusion.Show worked answer →
Question 2 of the external assessment applies the diffusion of innovations model and RE-AIM together, marked across four criteria worth 24 marks in total.
- Evaluate with RE-AIM (up to 8 marks)
- Use two RE-AIM steps to critically evaluate the PST program, each backed by a significant point from the stimulus. Reach asks how much of the cohort the program touched and how representative they were; Effectiveness weighs the size and balance of outcomes; Adoption and Implementation judge how many settings took it up and how faithfully it ran; Maintenance asks whether effects lasted. Avoid praising a single outcome in isolation.
- Reflect on uptake using diffusion process variables (up to 6 marks)
- Explain two diffusion process variables that shape uptake (the innovation's perceived attributes, communication channels, time and the social system) and link each to the program's impact. Relative advantage and compatibility are strong choices when justifying why the program spread or stalled.
- Justify impact and synthesise an action strategy (up to 10 marks combined)
- Justify how the program strengthens, maintains or adapts resources for the cohort, then justify a feasible diffusion action strategy: target opinion leaders and early adopters, match channels to the adoption stage, and set the methodology and resources needed to sustain uptake rather than launch once.
2021 QCAACritically appraise the Respectful Youth Volunteer Association Camp innovation from the stimulus book and predict the likely impact on participants who have graduated Year 12 in your selected context. Propose and justify a diffusion action strategy to promote innovation uptake in your selected context.Show worked answer →
This Question 2 is marked on RE-AIM evaluation, diffusion process variables, justifying impact, and synthesising an action strategy, for 24 marks.
- Critically appraise with RE-AIM (up to 8 marks)
- Evaluate the camp using two RE-AIM steps with significant supporting points. For example, appraise Reach (which of the cohort the camp could realistically attract) and Maintenance (whether the respectful-relationship benefits persist after a short camp).
- Predict impact using diffusion process variables (up to 6 marks)
- Explain two process variables and use them to predict uptake. Trialability and observability matter for a camp: a short, low-risk taster and visible benefits make adoption more likely; complexity or cost slows it.
- Justify the action strategy (up to 10 marks combined)
- Justify how the camp can develop respectful relationships as a general resistance resource, then propose and justify a diffusion action strategy: recruit respected early adopters as opinion leaders, choose interpersonal channels for actual adoption, and design for the chosen context's needs, barriers and enablers. Tie each design choice to a diffusion variable rather than asserting it.