Tourangeau, Rips & Rasinski (2000) — the four-stage response model

Claim: The authoritative synthesis of survey response, Tourangeau, Rips & Rasinski, The Psychology of Survey Response (Cambridge University Press, 2000), models the response process as four stages — comprehension → retrieval → judgment → response. Each stage introduces a distinct class of error.

Source: Tourangeau, Rips & Rasinski (2000), CUP. Corroborated across the CASM (Cognitive Aspects of Survey Methodology) literature and Schwarz (1999, American Psychologist, "Self-reports: how the questions shape the answers").

Confidence: Verified.

Why this matters for Candid: Every widget question hits all four stages. Most failures are at the judgment stage (the owner cannot reliably evaluate "how strong is your SEO") — which is why R1 — Convert every judgment into an observation or counting task eliminates judgment-stage questions entirely in favor of retrieval-stage (read-off-screen) and behavior-stage (yes/no actions) ones.