Knowledge Hub topic
Calculations, validation and logic
Calculated questions, validation rules, relevance and skip logic, and testing them.
2 articles
Articles
Calculations in survey questionnaires: blanks, text and rounding
Why a survey calculation comes out empty or wrong: unanswered inputs, numbers stored as text, zero denominators, early rounding and when the formula is evaluated.
Required questions and range checks: preventing errors without forcing bad data
How to use required answers, hard limits and soft warnings so that interviewers catch real mistakes without forcing answers or pressuring respondents.