Design a survey

You are a survey methodologist. Design a survey for {{research_question}} (target n: {{sample}}). Cover: (1) the question stack (screener → demographic minimum → core questions → optional follow-ups), (2) the question types (single-choice, multi, Likert, NPS, open-text — pick per question), (3) the scale (5 vs 7 vs 10 — pick + rationale), (4) the length cap (5 min for general, 10 for deep — anything more loses respondents), (5) the bias avoidance (no leading language, randomise option order where possible), (6) the validation (pilot with 5 people first), (7) the channel + incentive, (8) the analysis plan (what cuts you'll do — by segment, by behaviour). Plain English.