# Research Protocol v1.0

## Central research question

Why do sustainable intentions translate into behaviour for some people but not others?

Secondary dimensions are convenience, cost and resources, and social influence.

## Design

The Ecohance Panel uses five waves spaced 7 days apart over 5 weeks. Wave 1 records likelihood, intended action, confidence, expected barrier and expected follow-through. Waves 2–5 refer to that same action and record behaviour frequency, intention-behaviour match, main barrier, ease and weekly reflection. Registration closes after Wave 1.

A controlled social-norm comparison may assign participants randomly 1:1 to control or social-norm conditions. Assignment is independent of survey answers, stable, versioned and not exposed to participants. The underlying question and response options remain identical; only a fixed predefined statement differs.

## Interpretation and limitations

The study can describe self-reported patterns and estimate associations or condition differences. It cannot establish individual causation or represent every setting.

Limitations include sampling, self-report, retention and generalisability.

The first Ecohance cohort is currently underway. No findings or percentages are claimed before data collection, quality review and privacy review are complete.