Global market research, fieldwork, and respondent recruitment
Contact UsRespondent quality & validation
Yamada Research applies layered respondent validation throughout recruitment and fieldwork. Checks are selected according to the study audience, methodology, market, incidence, and risk profile, combining automated signals, respondent verification, behavioural review, and manual quality control.
Before fieldwork
At recruitment and onboarding, we confirm that a participant matches the required audience and check for obvious indicators of duplicate, automated, or misrepresented participation. The specific checks below are selected according to audience, methodology, and client specifications.
Email and telephone verification may be used to confirm that contact details are active and that recruitment communication reaches the intended participant. Double opt-in can be applied where required by the study or panel source.
Reported location may be compared with IP and device signals to identify location mismatches, anonymizing services, data-centre traffic, or other risk indicators.
Device, browser, session, and respondent identifiers may be reviewed to identify repeat participation, multiple-account behaviour, or duplicate survey entry.
Telephone type, country code, contact consistency, and address information may be reviewed where these details are relevant to eligibility or study logistics.
For B2B and healthcare studies, respondent eligibility may be confirmed using employer information, professional profiles, company domains, medical registrations, licences, institutional affiliations, or direct telephone verification.
Registration and survey-entry activity may be assessed using CAPTCHA, rate limits, session signals, and platform risk indicators to reduce automated or scripted participation.
During fieldwork
Respondent quality continues to be evaluated during participation. Automated and manual checks help identify inattentive, inconsistent, duplicated, or potentially automated responses.
Respondent IDs, survey links, devices, IP signals, and source records may be compared to identify repeat or cross-source participation in the same study, including cross-panel deduplication where supported by the client or survey platform.
Completion time is reviewed against the expected interview length and the observed respondent distribution. Unusually fast interviews may be flagged for further review rather than rejected automatically.
Grid responses and repeated selections may be reviewed for straightlining, repetitive patterns, contradictory answers, or behaviour that suggests limited engagement.
Depending on questionnaire design, studies may include instructional checks, repeated eligibility questions, consistency checks, and category-knowledge validation.
Open-ended answers are reviewed for relevance, duplication, gibberish, copied content, insufficient detail, and inconsistencies with the respondent's other answers.
Where appropriate, open-ended responses and survey behaviour may be reviewed for signals associated with scripted, copied, or AI-assisted participation. These signals support manual review and are not treated as conclusive evidence on their own.
Where source and platform data are available, unusually high survey-attempt frequency or repeated participation patterns may be reviewed to identify possible professional survey-taking or respondent fatigue.
Specialist audiences
Specialist recruitment requires audience-specific validation. The checks below are applied where relevant to the audience, market, and study requirements.
Validation may include medical registration, specialty, practice setting, employment, prescribing or treatment responsibility, patient exposure, and recent category experience.
Validation may include employer, job title, seniority, functional responsibility, organisation size, purchasing influence, budget involvement, and relevant technology or category experience.
Validation may include demographic fit, category usage, purchase recency, brand experience, household responsibility, location, and study-specific behavioural criteria.
Government, academic, technical, and other niche participants may require direct telephone confirmation, institutional verification, role validation, and additional manual screening.
Before delivery
Before data or respondent records are released, Yamada applies a final review based on the agreed project specifications and documented risk criteria.
Review of screener answers, quotas, market, audience, and study-specific eligibility.
Review of duplicate, IP-risk, timing, consistency, attention, device, and session indicators where available.
Manual review of flagged cases, open-ended responses, recruitment records, and supporting verification evidence.
Checks by market, source, audience, recruiter, quota group, and interview status to identify unusual patterns.
Documentation of important validation decisions, exclusions, overrides, and client-approved exceptions.
Validated respondent or data files are delivered with agreed status reporting, issue summaries, and supporting documentation where required.
Escalation
Automated signals do not make the final decision alone. Cases are assessed using the full respondent record, survey behaviour, recruitment evidence, and project requirements.
Where a response cannot be validated, it may be excluded, replaced, or referred to the client according to the agreed fieldwork protocol.
Tooling
Yamada combines project-specific verification, survey-platform controls, third-party risk signals, and manual review. The exact toolset depends on the methodology, audience, market, and client environment.
Data handling and verification procedures are adapted to applicable client, platform, and market requirements.
In summary
Quality control is not a single check at the end of a project. It is a layered process applied from recruitment and onboarding through survey participation, final validation, and delivery.
Share your audience, markets, methodology, and risk requirements. We will define the appropriate recruitment, verification, behavioural, and final-review checks for your study.
Start a conversation
Share your target markets, audience, methodology, sample or quota, timeline, and any online, offline, language, or validation requirements. Our team will review feasibility and respond with a practical recruitment approach.
Address
Yamada Research Co., Ltd.Phone
+66 95 289 1878Healthcare · B2C · B2B · Automotive · Sensory
