IxDF Certificate of Completion

Data-Driven Design: Quantitative Research for UX

IxDF Course Certificate awarded to Diana Weil for completing the "Data-Driven Design: Quantitative Research for UX" course
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The Interaction Design Foundation (IxDF) hereby certifies that the IxDF Course Certificate (ID #7f051f1d-fb22-48a8-974e-2f0ae2dcc8af) has been conferred upon Diana Weil 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 Diana Weil

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

  • Make the case for quantitative UX research as a complement to qualitative methods, and weigh the strengths and limits of each.

  • Fit surveys, early-design tests, analytics, and A/B/multivariate tests into the appropriate phase of a project lifecycle, with clear judgment about which methods belong at the start, middle, or end of development.

  • Use triangulation to combine qualitative depth with quantitative scale before committing resources to a design direction.

  • Write strong survey questions using short words, vertical response formats, randomized order, neutral language, and opt-outs like "Don't know" and "Prefer not to say."

  • Recruit, screen, and size studies for quantitative UX research, including writing effective screeners, targeting behaviors and needs over demographics, and spotting failing participants like straightliners and speed-runners.

  • Design and deploy survey research end-to-end, from framing research questions and recruiting participants to choosing between custom questionnaires and standardized instruments like SUS (System Usability Scale) and WAMMI (web-specific, paid).

  • Test navigation early with tree tests to isolate terminology and information architecture from visual design distractions.

  • Test layout and visual hierarchy with first-click tests on wireframes or screenshots to predict task success.

  • Set up early-design tests with user-language goals, interpret pietree reports and first-click heatmaps, and confirm results with Chi-Square tests.

  • Use Google Analytics to define conversion goals, read core reports, analyze landing pages and referral paths, and build stable KPI dashboards.

  • Design, plan, and interpret A/B, redirect, and multivariate (A/B/n) tests on live sites or apps, sizing tests appropriately, confirming results with Chi-Square, and interpreting inconclusive results honestly.

  • Run Chi-Square and Fisher's exact tests on categorical data using raw counts rather than percentages.

  • Analyze Likert scale data correctly with weighted approaches and Chi-Square, avoiding the trap of treating ordinal data as interval.

  • Frame UX studies using the null and alternative hypotheses, conduct hypothesis tests, interpret p-values against the UX-standard 0.05 threshold, and explain results in language stakeholders understand.

  • Identify the four data types (nominal, ordinal, interval, ratio), distinguish within-subjects from between-subjects designs, and choose between parametric tests (t-test, ANOVA) and non-parametric alternatives (Mann-Whitney U, Wilcoxon, Kruskal-Wallis) based on the data.

  • Apply core statistical concepts to UX datasets, including descriptive statistics (minimum, maximum, range, mean, median, standard deviation, variance) and distributions (histograms, normal distribution, QQ plots), using Excel, Google Sheets, or free online calculators.

  • Recognize and minimize survey bias (social desirability, conformity, yea-saying, stereotype) using Jeff Sauro's framework, and spot disengaged respondents (straightliners, speed-runners) before analyzing the data.

  • Conduct ad hoc analyses with a five-step method (question, gather, transform, analyze, answer) and use advanced features like custom segmentation, page value, and goal flow to investigate UX problems.

  • Run Jansen's four-step web analytics process (identify stakeholders, define primary goals, pinpoint key visitors, and set KPIs) to align analytics with business priorities.

  • Apply correlation (Pearson vs. Spearman), effect size, statistical power, and confidence intervals to make richer claims about UX data.

  • Build a UX analytics practice that reveals what users do (not what they say), and understand the mechanics and limits of cookies, web beacons, and event tracking.

Diana Weil

Diana Weil

Senior Product Designer

Ben Lomond, CA, United States
  • 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
 Meetup Organizer
    IxDF Meetup Organizer distinction: Organized meet-up(s) for an IxDF Local Group
  • More distinctions
    +4

IxDF Distinctions

Distinctions are conferred upon Diana Weil 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
 Meetup Organizer Distinction IxDF Meetup Organizer
Organized meet-up(s) for
an IxDF Local Group
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 Diana Weil

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

IxDF Master Class Certificates Earned

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

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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 Create Successful Design Systems with Storytelling certificate

How to Create Successful Design Systems with Storytelling

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Win Clients, Pitches and Approval: Present Your Designs Effectively certificate

Win Clients, Pitches and Approval: Present Your Designs Effectively

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A Guide to Hassle-Free Designer-Developer Collaboration certificate

A Guide to Hassle-Free Designer-Developer Collaboration

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IxDF Membership Certificate

This IxDF Membership Certificate (ID #mc_RZzt0pLlh) has been issued to Diana Weil 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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