IxDF Certificate of Completion

Interaction Design for Usability

IxDF Course Certificate awarded to Sudarat Persson for completing the "Interaction Design for Usability" course
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The Interaction Design Foundation (IxDF) hereby certifies that the IxDF Course Certificate (ID #49a7a676-defb-470a-9a5d-52186dbe926c) has been conferred upon Sudarat Persson 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 Sudarat Persson

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

  • Plan and run moderated usability tests, then turn findings into prioritized fixes, grounding design decisions in evidence.

  • Conduct heuristic evaluations and benchmarking to catch problems early, while they're less costly to fix.

  • Run and analyze card sorts to structure navigation around how people actually think, so users can find what they need without guessing.

  • Design and interpret A/B and multivariate tests to prove which version performs.

  • Build conversion funnels and run root cause analysis to pinpoint where users drop off and why.

  • Quantify interaction efficiency with Fitts' Law and the Keystroke-Level Model to make frequent tasks measurably faster.

  • Audit interfaces against WCAG accessibility standards and optimize for search (SEO) to widen reach and reduce legal exposure.

  • Design usable forms, navigation, and visual layout using layout grids, visual hierarchy, and Gestalt grouping.

  • Apply persuasion and trust techniques, from credibility cues to emotional journey mapping, to build the trust that lifts conversion.

  • Build personas that keep real users at the center of every decision, as well as the requirements and prototypes that turn insight into tested design.

  • Integrate UX into Agile delivery using the Parallel Streams approach and design maps, keeping design and research one cycle ahead of development.

  • Use the psychology of attention and perception to guide the eye to the most important elements first.

  • Apply human error theory to design interfaces that help users avoid mistakes and recover from them.

  • Distinguish conceptual and domain models and use them to provide a shared understanding across a team.

  • Use the inverted pyramid and readability metrics so users can find and act on content quickly.

  • Design dynamic interfaces with AJAX that update smoothly without disorienting users or compromising SEO and accessibility.

  • Close the empathy gap with empathetic design techniques, replacing vague user stories with persona stories that keep development grounded in real user needs.

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Sudarat Persson

Sudarat Persson

Product designer

Bandhagen, Stockholm, Sweden
  • IxDF Best-in-Class
    IxDF Best-in-Class distinction: Completed an IxDF Course with a score of 100%
  • IxDF Top 10% Course Taker
    IxDF Top 10% Course Taker distinction: Completed an IxDF course with a score of 90%
  • IxDF Assiduous Learner Award
    IxDF Assiduous Learner Award distinction: Completed 5 IxDF Courses
  • IxDF Local Group Member
    IxDF Local Group Member distinction: Member of an IxDF Local Group
  • More distinctions
    +3
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IxDF Distinctions

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

IxDF Assiduous Learner Award Distinction IxDF Assiduous Learner Award
Completed 5
IxDF Courses
IxDF Best-in-Class Distinction IxDF Best-in-Class
Completed an IxDF Course
with a score of 100%
IxDF Certified Course Completer Distinction IxDF Certified Course Completer
Completed one or more
IxDF Courses.
IxDF Community Influencer Distinction IxDF Community Influencer
Contributed meaningfully
to IxDF Conversations
IxDF Local Group Member Distinction IxDF Local Group Member
Member of an
IxDF Local Group
IxDF Master Class Learner Distinction IxDF Master Class Learner
Completed one or more
IxDF Master Classes
IxDF Top 10% Course Taker Distinction IxDF Top 10% Course Taker
Completed an IxDF course
with a score of 90%
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Certificates Earned
by Sudarat Persson

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

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Human-Computer Interaction: The Foundations of UX Design certificate

Human-Computer Interaction: The Foundations of UX Design

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IxDF Master Class Certificates Earned

IxDF Master Class Certificates are awarded to Sudarat Persson in formal recognition of their attendance and ongoing commitment to learning from industry leaders.

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How to Make Your User Research Indispensable to Product Decisions certificate

How to Make Your User Research Indispensable to Product Decisions

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Agentic AI for Everyone: How to Integrate Agents into Your Day-to-Day Work certificate

Agentic AI for Everyone: How to Integrate Agents into Your Day-to-Day Work

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Sketch with Confidence: The Skill That Gets Your Design Thinking Out of Your Head certificate

Sketch with Confidence: The Skill That Gets Your Design Thinking Out of Your Head

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UI Sound for Designers: The Hidden Layer of Human-Centered Design certificate

UI Sound for Designers: The Hidden Layer of Human-Centered Design

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How to Build Agentic AI Workflows for Product Design: Go from Prompts to Systems certificate

How to Build Agentic AI Workflows for Product Design: Go from Prompts to Systems

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AI in Healthcare UX: How You Can Design Trustworthy Interfaces in High-Stakes Environments certificate

AI in Healthcare UX: How You Can Design Trustworthy Interfaces in High-Stakes Environments

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Align Teams, Save Time and Reduce Stress with Communication Systems certificate

Align Teams, Save Time and Reduce Stress with Communication Systems

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Demonstrate the ROI of Design Thinking and Win Stakeholder Support certificate

Demonstrate the ROI of Design Thinking and Win Stakeholder Support

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The ROI of User Research: Prove the Value, Get Buy-In, Stay Relevant certificate

The ROI of User Research: Prove the Value, Get Buy-In, Stay Relevant

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Design for AI Agents: Healthcare and High-Stakes Systems certificate

Design for AI Agents: Healthcare and High-Stakes Systems

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Accessible Typography: Design UIs All Your Users Will Love to Use certificate

Accessible Typography: Design UIs All Your Users Will Love to Use

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What's Your Best Career Move? Why Building a Design Community Was Mine certificate

What's Your Best Career Move? Why Building a Design Community Was Mine

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Healthcare UX: Design for Patient Engagement and Technology Adoption certificate

Healthcare UX: Design for Patient Engagement and Technology Adoption

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Design for Everyone: A Firsthand Perspective on Accessibility certificate

Design for Everyone: A Firsthand Perspective on Accessibility

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How to Break into UI Design: Design Skills That Make You Irreplaceable by AI certificate

How to Break into UI Design: Design Skills That Make You Irreplaceable by AI

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The AI Playbook: How to Capitalize on Machine Learning certificate

The AI Playbook: How to Capitalize on Machine Learning

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Storytelling That Sells UX Design: Define Requirements and Engage Leadership certificate

Storytelling That Sells UX Design: Define Requirements and Engage Leadership

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Influence Product Strategy with Design: Learn from a Booking.com Case Study certificate

Influence Product Strategy with Design: Learn from a Booking.com Case Study

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Innovate with Design Thinking: Your Shortcut to Results certificate

Innovate with Design Thinking: Your Shortcut to Results

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Earn Your Seat at the Table: Leadership Lessons for Designers certificate

Earn Your Seat at the Table: Leadership Lessons for Designers

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How to Master the Invisible Work: Practical Tips and Insights to Build a Design Culture and Advance Your Career certificate

How to Master the Invisible Work: Practical Tips and Insights to Build a Design Culture and Advance Your Career

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User Research for Everyone: Practical Strategies for Every Team certificate

User Research for Everyone: Practical Strategies for Every Team

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Learning Experience Design: How to Create Powerful Learning Journeys certificate

Learning Experience Design: How to Create Powerful Learning Journeys

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How to Create AI Images: On-Brand and Inclusive Photography certificate

How to Create AI Images: On-Brand and Inclusive Photography

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How to Design for the Human Mind: Cognitive Science for UX certificate

How to Design for the Human Mind: Cognitive Science for UX

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Design Systems Blueprint: Comprehensive Strategies for Success certificate

Design Systems Blueprint: Comprehensive Strategies for Success

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Behavioral Design 101: How to Design for Behavior Change certificate

Behavioral Design 101: How to Design for Behavior Change

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How to Elevate the User Experience of AI with Design Patterns certificate

How to Elevate the User Experience of AI with Design Patterns

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How to Design for Neurodiversity: Inclusive Content and UX certificate

How to Design for Neurodiversity: Inclusive Content and UX

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Boost Mobile UX with UX Design Principles and Best Practices certificate

Boost Mobile UX with UX Design Principles and Best Practices

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How to Create Successful Design Systems with Storytelling certificate

How to Create Successful Design Systems with Storytelling

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IxDF Membership Certificate

This IxDF Membership Certificate (ID #mc_T3cTK0vgQ) has been issued to Sudarat Persson 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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