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Cross-Cultural Survey Design Guide — Back-translation and Measurement Invariance
We measured the same NPS in the US and Japan and the scores diverged dramatically — was it really a difference in experience, or did the translation end up measuring different things? This guide organizes the methodologies that secure cross-cultural surveys, from Brislin's Back-translation, Harkness's TRAPD, the bias classification in Van de Vijver & Tanzer (2004), through to the measurement invariance verification framework in Vandenberg & Lance (2000).
Read moreSurvey Pre-Launch Checklist — 5 Steps to Catch Distribution Mistakes
Rework after main fielding turns into a 1–2 week loss. This guide organizes a practical 30-minute flow that checks five items — question quality, branching behavior, mobile real-device testing, pilot distribution, and final delivery settings — together with deep-dive links to the dedicated articles.
Read moreMixed Methods Research Design Guide — Integrating Quantitative and Qualitative Approaches
We organize the design of Mixed Methods research — which integrates quantitative surveys with qualitative interviews — centered on Creswell's four core designs, integrated analysis through Joint Display, and the evaluation of meta-inferences, grounded in the academic foundations of Greene (1989), Tashakkori & Teddlie (2010), and others. We make clear why simply 'doing both' is not yet mixed methods, and what it takes for the deliberate combination of quantitative and qualitative work to produce new insights that neither approach can reach alone.
Read moreSurvey Reliability and Validity Guide — Ensuring Measurement Quality with Cronbach's Alpha and Construct Validity
Reliability and validity verification ensures that the data your survey collects actually measures what you intend to measure. We organize Cronbach's alpha, test-retest reliability, the three categories of validity (content, construct, and criterion), and the entry points into exploratory factor analysis (EFA) and confirmatory factor analysis (CFA), grounded in the academic work of Nunnally, Cronbach, and Messick.
Read moreVan Westendorp Price Sensitivity Meter (PSM) Design Guide — How Four Questions Map an Acceptable Price Range
When you need to set a price for a new product or service, PSM is the survey you run first — and has been since 1976. We organize the four-question structure, the four intersection points (PMC / PME / IPP / OPP), the Newton-Miller-Smith extension, how it differs from conjoint analysis, and the limitations raised by Lipovetsky et al. (2011), so you can act on it.
Read moreSurvey Intro and Closing Message Guide — The 4 Pieces of Copy That Drive Completion Rate
Survey completion isn't decided by questions alone. The intro, progress indicator, thank-you page, and follow-up email are four pieces of copy that drive completion rate, data quality, and re-participation. We organize the design rules with Dillman's Social Exchange Theory, Conrad et al. (2010) on progress bars, and the Belmont Report's Informed Consent framework.
Read moreVoC Program Design Guide — Upgrading One-Off Surveys into an Operating Program
How to move NPS, CSAT, and CES from a 'measure it' phase to a 'move the organization' phase. The four building blocks of a VoC program, closed-loop operations, and the common failure patterns — grounded in Anderson & Mittal (2000), Reichheld (2003), and others.
Read moreFree Survey Tool Comparison — 8 Tools to Choose by Use Case [2026 Edition]
Eight major free survey tools compared by free plan limits, cheapest paid plan pricing, what the AI features actually do, and how to choose by use case — using fresh 2026 official-source data.
Read moreSurvey Reminder Email Guide — Lift Response Rates 1.5× with Timing and Copy
Survey reminder emails can move response rates significantly with the right timing, subject lines, and body copy. We cover send-count and interval targets grounded in Dillman's Tailored Design Method, copy-paste subject and body templates, and the patterns to avoid — written for hands-on operations.
Read moreCX Metrics Comparison Guide — When to Use NPS, CSAT, or CES
NPS, CSAT, and CES are the three core CX metrics. We cover what each one actually measures, when to use which, how to choose by company stage, and the most common mistakes — grounded in the foundational papers from Reichheld (2003) and Dixon et al. (2010).
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