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Pablo Rodriguez

Methodology Participants

Choose a method that fits your goals, time, and fidelity. Then recruit participants who genuinely reflect your users, including those using assistive technologies.

  • Study type
    • Moderated usability study: real‑time facilitation with think‑aloud to probe “why.”
    • Unmoderated: scalable task completion with structured prompts; limited probing.
    • Remote vs. in‑person: remote increases reach; in‑person allows closer observation.
  • Data types
    • Qualitative: behaviors, quotes, errors, backtracks, mental models, workarounds.
    • Quantitative (lightweight): task success, time on task, error counts, post‑task ratings.
  • Procedure
    • Session flow: welcome/consent → warm‑up → tasks → wrap‑up → debrief.
    • Assistance rules: when to clarify vs. when to observe struggle; define ahead of time.
    • Instruments: script, task prompts, questionnaires, note template, recording setup.
    • Analysis plan: what to tally (KPIs), how to code notes, how to synthesize themes.
    • Pilot: run 1–2 sessions to check pacing, wording clarity, and technical setup.

Think‑Aloud Tips

  • Remind participants you are testing the design, not them.
  • Ask them to verbalize expectations, surprises, and reasoning.
  • Use neutral probes: “What were you expecting?” “What would you try next?”
  • Target profile
    • Demographics, domain familiarity, device/platform, language, and accessibility needs.
    • Screen for exclusion criteria (e.g., employees, prior testers) if necessary.
  • Sample size rationale
    • 5–8 moderated sessions typically surface common issues in primary flows.
    • Plan more if flows are complex, variants are many, or audience segments differ.
  • Recruitment channels
    • Panels and services; direct outreach to communities; customer lists with consent.
    • Incentives: fair, consistent, and appropriate for session length and locale.
  • Diversity and inclusion
    • Ensure representation of historically excluded groups and a range of abilities.
    • Avoid over‑indexing on early adopters/power users; include novices.
  • Accessibility accommodations
    • Confirm screen reader, captions, transcripts, large targets, keyboard navigation.
    • Offer flexible timing, breaks, and alternative input setups.

Inclusive Recruiting (Near‑source points)

Section titled “Inclusive Recruiting (Near‑source points)”
  • Engage a broad range of perspectives and abilities to avoid bias toward selected groups.
  • Intentionally include participants who are often marginalized or excluded to reflect your real user base.
  • Provide accommodations up front and confirm needs during screening to ensure a respectful, effective session for all.
  • Screener examples
  • Ask about device/platform familiarity relevant to your prototype.
  • Ask about use of assistive technologies (voluntary, respectful wording).
  • Verify basic eligibility without leading participants to “correct” answers.
  • Sessions: 30–45 minutes each; two researchers (moderator + note‑taker).
  • Recording: with explicit consent only; store securely; anonymize in notes/clips.
  • Environment: stable network for remote; quiet room and camera positioning for in‑person.
  • Debrief: 10 minutes after each session to log issues, severity, and hypotheses while details are fresh.
  • Scheduling & incentives: allow buffer time between sessions; compensate fairly and consistently per locale norms.

Bias Guards

  • Use consistent introductions and prompts.
  • Randomize task order when possible.
  • Avoid leading language and facial reactions.
  • Separate observation from interpretation in notes.

Data Hygiene

  • Label notes by task and timestamp.
  • Capture exact wording for quotes; tag with theme codes.
  • Mark assistance moments; they matter for success definitions.
  • Track environment (device, browser, AT) for reproducibility.

Summary: Method drives what evidence you can collect; participants determine how credible it is. Define procedure and bias guards up front, recruit inclusively, and plan accommodations so all users can participate effectively.