IxDF Certificate of Completion

The Ultimate Guide to Visual Perception and Design

IxDF Course Certificate awarded to MARIOLA GAJEWSKA for completing the "The Ultimate Guide to Visual Perception and Design" course
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The Interaction Design Foundation (IxDF) hereby certifies that the IxDF Course Certificate (ID #26ff0bf1-370d-4eff-8d06-4482092a81f0) has been conferred upon MARIOLA GAJEWSKA 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 MARIOLA GAJEWSKA

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

  • Design visual products that accommodate the physiology of human vision so that interfaces work with, rather than against, the way users actually see.
  • Critically evaluate existing real-world designs against principles of visual perception, object perception, color vision, and human eye physiology to identify what works, what fails, and why.
  • Apply the Gestalt principles of perceptual organization (Pragnanz, similarity, proximity, common fate, familiarity/meaningfulness, and continuity, plus the newer principles of common region, element connectedness, and synchrony) to group, structure, and clarify on-screen elements.
  • Use figure/ground organization and perceptual segregation to direct attention and make key elements stand out from their background.
  • Place critical information, alerts, and controls in line with foveal vision and the user's current point of fixation to ensure important elements aren't lost.
  • Apply theories of object perception, including Marr's Computational Approach, Treisman's Feature Integration Theory, and Biederman's Recognition-by-Components (geons), to design screen elements that are quickly identified, selected, and distinguished from competing items.
  • Apply an understanding of color vision to make color choices that aid rather than hinder user comprehension.
  • Manage the three factors that govern color discrimination (paleness, size, and separation) and the three properties of color (hue, chroma, and lightness) to keep color-coded information legible and fast to interpret.
  • Build accessible designs for the roughly 8% of men and 0.5% of women with a color vision deficit, using safe color choices and redundant cues so no user is excluded by color alone.
  • Design color schemes, combinations, and text treatments that remain usable under varying light conditions and avoid slowing user productivity.
  • Recognize how memory, expectation, and learned associations shape what users actually see (drawing on the constructivist and ecological approaches) and design interfaces that work with those mental models rather than against them.
  • Capture and hold user attention so that important information and carefully designed features are noticed and not overlooked.
  • Choose and deploy imagery effectively, using information-rich images over filler, so visuals communicate the intended message rather than simply decorate.
  • Leverage the superior recall and recognition of images over words to reduce cognitive load, support recognition-based scanning, and improve overall user experience and productivity.
  • Design around the physiological blind spot, arranging displays so must-see information is never placed where the user will physically miss it.
  • Design effective icons using sound function-to-icon mapping (literal, analogical, or arbitrary) and the seven principles of effective icon design, while avoiding the common icon-design mistakes that confuse users.
View Profile: MARIOLA GAJEWSKA
  • IxDF Top 10% Course Taker
    IxDF Top 10% Course Taker distinction: Completed an IxDF course with a score of 90%
  • IxDF Local Group Member
    IxDF Local Group Member distinction: Member of an IxDF Local Group
  • IxDF Community Influencer
    IxDF Community Influencer distinction: Contributed meaningfully to IxDF Conversations
  • IxDF Master Class Learner
    IxDF Master Class Learner distinction: Completed one or more IxDF Master Classes
  • IxDF Certified Course Completer
    IxDF Certified Course Completer distinction: Completed one or more IxDF Courses.

Oxford, United Kingdom

MARIOLA GAJEWSKA

Product, UX/UI & Brand Designer at Passle Ltd

IxDF Distinctions

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

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 MARIOLA GAJEWSKA

IxDF Course Certificates are awarded to MARIOLA GAJEWSKA 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 MARIOLA GAJEWSKA in formal recognition of their attendance and ongoing commitment to learning from industry leaders.

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Mental Models: How to Design for the Way Your Users Think certificate

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IxDF Membership Certificate

This IxDF Membership Certificate (ID #PPGkp5Wmd) has been issued to MARIOLA GAJEWSKA 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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