Library and past research
Reuse what you have learned while preserving the context of each study.
Keep useful research together
Use Library for saved research and prior findings. Keep titles, study references and source context clear so someone returning later can understand what was measured and why.
Context documents, imported historical data and native study responses have different origins. Check the source type before treating an item as respondent evidence.
Compare studies deliberately
Check the audience, question identity, answer scale, source mix, fieldwork dates, quality rules and weights. Similar question titles do not establish comparability.
Use the bases and disclosures supplied by the comparison. If evidence is unavailable, report that limit; a summary cannot recreate missing respondent records.
Plan the next wave
Reuse stable measures when tracking a change over time. Record edits and keep wave membership clear. Multiple observations from the same person do not count as independent people.
Separate a real change in answers from a change in how the study recruited or measured them. See Quantitative methods.