IxDF Certificate of Completion

Conducting Usability Testing

IxDF Course Certificate awarded to Zoe Tsoi for completing the "Conducting Usability Testing" course

The Interaction Design Foundation (IxDF) hereby certifies that the IxDF Course Certificate (ID #bac848a1-5b65-4a40-befe-77e4fe140fad) has been conferred upon Zoe Tsoi with a Top 10% Course Taker Distinction in formal recognition of completing evidence-based curricula taught by industry leaders, to the standards established by the IxDF Educational Codex. View Course Curriculum.

This document serves as the official record of the above credential. Third parties may reference the certificate ID to verify its authenticity. The Interaction Design Foundation maintains permanent records of all credentials issued.

Verified Competencies Demonstrated by Zoe Tsoi

By completing this curriculum to the standards of the IxDF Educational Codex, Zoe Tsoi has demonstrated mastery of how to:

  • Define usability testing, decide when to use it over related methods, and set clear usability goals.
  • Make the business case for usability testing and establish it as a recurring part of the design process to embed it in a team's culture.
  • Build a structured test plan grounded in linked user and business objectives, select the appropriate type of test for the situation, and capture the right metrics for the design decision at hand.
  • Determine an appropriate sample size for the chosen test type, defend that number to stakeholders unfamiliar with qualitative research, and screen and recruit the ideal participants.
  • Write well-formed, scenario-based test tasks using realistic, non-leading language that results in natural user behavior.
  • Conduct a pilot ("dry run") test to surface and fix problems before testing with real participants.
  • Moderate a usability test effectively and maintain control of a session.
  • Observe without bias by keeping personal and organizational agendas out of observation.
  • Analyze test results, write a concise, persuasive usability test report, and then use findings to influence and negotiate with stakeholders.
  • Build user empathy and advocacy among stakeholders by having them observe live sessions firsthand.
  • Decide when and how often to test, prioritizing early and iterative testing to catch issues while they are still cheap to fix.
  • Avoid common data-quality traps, including over-reliance on user self-reporting and the misuse of remote tools that don't capture true metrics.
  • Protect participant wellbeing and brand reputation by recognizing and avoiding "user emotion traps" so participants leave emotionally neutral.

Certificates Earned
by Zoe Tsoi

IxDF Course Certificates are awarded to Zoe Tsoi in formal recognition of completing evidence-based curricula taught by industry leaders, to the standards established by the IxDF Educational Codex.

View Certificate
Human-Computer Interaction: The Foundations of UX Design certificate

Human-Computer Interaction: The Foundations of UX Design

View Certificate

IxDF Membership Certificate

This IxDF Membership Certificate (ID #mc_SLrlVMsd7) has been issued to Zoe Tsoi in formal recognition of their membership of the Interaction Design Foundation (IxDF).

The authenticity of this membership certificate can be verified on this permanent link.

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