Quantitative research
Surveys, experiments, administrative data, and statistical analysis where measurement, comparison, and inference are central.
Methodology
Transparent methods proportionate to the question and context—from defining the problem to publishing and correcting findings.
Research begins with the question and the decision the finding is intended to support—not with the instrument. Concepts, population, time, and geography are reviewed before selecting design, data sources, sample, instrument, and analysis plan.
Surveys, experiments, administrative data, and statistical analysis where measurement, comparison, and inference are central.
Interviews, focus groups, observation, and document analysis to understand experience, meaning, context, and mechanisms.
Structured integration of measurement and explanation, identifying each component’s role and how results are combined.
Analysis of existing data, documents, and sources with assessment of quality, compatibility, and definitions.
Involve relevant groups in questions or interpretation without transferring professional responsibility to them.
Use digital tools or data subject to privacy, quality, and transparency controls.
Quality controls differ by collection mode and may include training, testing, observation, verification calls, duration and logic checks, duplicate and location checks, authorized audio review, and open-response review. Automated indicators are not used alone for punitive decisions without human review.
Review, responsibilities, checks, and error treatment.
Consent, voluntariness, harm minimization, and safeguarding.
Data minimization, security, retention, and sharing.
Limits on commissioner influence, funding, and conflicts.
Information accompanying each output and methodology.
Treatment of errors, revisions, and invalid materials.
Controls for digital tools, automation, and human verification.
A sampling frame is assessed for coverage, duplication, currency, and accessibility. Where a complete probability frame is unavailable, the alternative and resulting limitations are explained. Depending on the question, studies may use stratified, clustered, systematic, multistage, purposive, theoretical, or typical-case sampling.
Translation is reviewed for conceptual equivalence and comprehensibility rather than literal matching alone. The process may include initial translation, bilingual review, back-translation where useful, cognitive testing, and documentation of terms without a direct equivalent.
May cover groups missed by digital modes but requires safety, supervision, and attention to interviewer effects.
Can support rapid reach but requires assessment of number coverage, response, and privacy.
May reduce some implementation costs but can exclude disconnected populations and increase self-selection or duplication risk.
Provide depth and explanation but do not produce population percentages unless the design supports them.
Require understanding of original purpose, quality, coverage, and changes in definitions.
Requires a plan explaining why modes are combined and how mode differences are handled.
Analysis should be reproducible through code or a clear processing record, with fixed data versions and rules. Where confidentiality prevents data or code release, a methodological description or intermediate tables may support reasonable review without exposing restricted information.
Margins of error or confidence intervals are reported where appropriate, together with design effects, weighting, and small-cell limitations. Sensitivity analysis may test missing data, definitions, rules, or assumptions. Excessive numerical precision should not conceal genuine uncertainty.
After delivery or publication, problems, deviations, lessons, and required updates are reviewed. A close-out record or learning meeting may distinguish individual error from a system issue and recommend an implementable change to templates, training, or systems.