Match your intervention type to the COM-B gap

Use the Behavior Change Wheel to select the intervention approach that fits the diagnosed gap — not your default.

Why it works

The Behavior Change Wheel maps nine intervention types (education, training, persuasion, incentivisation, coercion, restriction, environmental restructuring, modelling, enablement) onto the COM-B components they primarily address. Mismatched interventions waste effort; matched ones target the mechanism that is actually blocking behavior. This is a meta-level practice: it changes how you design your change attempt, not the behavior directly.

How to do it

1. Complete the COM-B diagnosis first (see the diagnostic practice above).
2. For a Capability gap: choose education (knowledge), training (skill), or enablement (self-regulation support).
3. For an Opportunity gap: choose environmental restructuring (physical) or modelling/social norms (social).
4. For a Motivation gap: choose persuasion (reflective) or incentivisation/reward design (automatic).
5. Run the chosen intervention for 4 weeks before deciding it has failed — effects take time to accumulate.

Evidence

The Behavior Change Wheel was developed from a synthesis of 19 frameworks and validated through expert review. Its use in public-health intervention design has increased systematic coverage of relevant mechanisms. (mechanistic)

The wheel is a design heuristic, not an algorithm. Real behavior-change problems usually involve multiple COM-B components, and sequencing interventions requires judgment.

Sources

• Michie, van Stralen & West (2011), Implementation Science

Common mistake

Running education interventions (knowledge transfer) for motivation gaps, or motivation campaigns for opportunity gaps — the most common mismatch in public health and personal change alike.