What to review
Compare wording, response scales, population and fieldwork dates. Identify any changes before treating a difference as a trend.
A practical example
One survey asking whether a policy is important and another asking whether it is satisfactory measure different judgments. Subtracting their percentages would not establish a change over time.
Keep the claim in scope
Use a comparison only after the measures have been aligned. Explain material differences instead of smoothing them away.
Research and editorial context
A result is meaningful within its methodology. Match the research question, assessed universe and measurement period before making a comparison. These reference notes explain evaluation concepts; they do not add indicators, weights or thresholds to any published WCRC study.
Examples illustrate a decision and do not describe a named organisation's conduct. This is a reference note, not a new research finding or an award outcome.
Read the relevant WCRC material
These links provide WCRC context. Individual properties retain their own eligibility, evidence requirements and limitations.