IxDF Certificate of Completion

Conducting Usability Testing

The Interaction Design Foundation (IxDF) hereby certifies that the IxDF Course Certificate (ID #7491e4f4-b406-4b2b-8f51-887c520b2040) has been conferred upon Marcel Sendrea 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 Marcel Sendrea

By completing this curriculum to the standards of the IxDF Educational Codex, Marcel Sendrea 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.

Marcel Sendrea

Senior UX Designer

Renton, Washington, United States

IxDF Best-in-Class distinction: Completed an IxDF Course with a score of 100%
IxDF Top 10% Course Taker distinction: Completed an IxDF course with a score of 90%
IxDF Assiduous Learner Award distinction: Completed 5 IxDF Courses
IxDF Local Group Member distinction: Member of an IxDF Local Group
IxDF Certified Course Completer distinction: Completed one or more IxDF Courses.

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Certificate Verification

Share this permanent link to verify the authenticity of this credential:

https://ixdf.org/members/marcel-sendrea-3/certificate/course/7491e4f4-b406-4b2b-8f51-887c520b2040

IxDF Distinctions

Distinctions are conferred upon Marcel Sendrea in formal recognition of their notable achievements and
contributions, as stipulated by the IxDF Educational Codex.

IxDF Assiduous Learner Award

IxDF Best-in-Class

IxDF Certified Course Completer

IxDF Local Group Member

IxDF Top 10% Course Taker

Certificates Earned
by Marcel Sendrea

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

Certificates Earned
by Marcel Sendrea

Build a Standout UX/UI Portfolio: Land Your Dream Job

View Certificate

Conducting Usability Testing

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Interaction Design for Usability

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Object-Oriented UI Design: Build Interfaces Users Love

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AI for Designers

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IxDF Membership Certificate

This IxDF Membership Certificate (ID #mc_VXrDlFcM0) has been issued to Marcel Sendrea 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.

Certificate of Membership – Marcel Sendrea

IxDF Certificate of Completion

Conducting Usability Testing