COLIN M. GRAY, YUBO KOU, 

BRYAN BATTLES, JOSEPH HOGGATT, 

& AUSTIN L. TOOMBS
PURDUE UNIVERSITY
The Dark (Patterns) Side
OF UX DESIGN
Increasing interest in critical/

ethical aspects of HCI & UX
Our Concern
Ethics-focused methods are frequently bound to
academia, making practitioner access to these 

conversations difficult, and activation of their

implications problematic.
https://medium.com/shanghaiist/chinese-shoe-company-tricks-people-
into-swiping-instagram-ad-with-fake-strand-of-hair-54d8a2d8ec1d
Harry Brignull
UX practitioner
“A user interface that has been carefully
crafted to trick users into doing things…they are
not mistakes, they are carefully crafted with a
solid understanding of human psychology, and
they do not have the user’s interests in mind”
BRIGNULL’STYPOLOGY
EXPANDINGUPONBRIGNULL
Which user or stakeholder interests are or
should be kept in mind?
What is the user being “tricked” into doing,
and with what motivation?
Are there instances where being tricked into
doing something is desired by the user?
Can interactions not designed to trick the user later become
dark patterns through tech infrastructure changes?
EXPANDINGUPONBRIGNULL
Which user or stakeholder interests are or
should be kept in mind?
What is the user being “tricked” into doing,
and with what motivation?
Are there instances where being tricked into
doing something is desired by the user?
Can interactions not designed to trick the user later become
dark patterns through tech infrastructure changes?
EXPANDINGUPONBRIGNULL
Which user or stakeholder interests are or
should be kept in mind?
What is the user being “tricked” into doing,
and with what motivation?
Are there instances where being tricked into
doing something is desired by the user?
Can interactions not designed to trick the user later become
dark patterns through tech infrastructure changes?
EXPANDINGUPONBRIGNULL
Which user or stakeholder interests are or
should be kept in mind?
What is the user being “tricked” into doing,
and with what motivation?
Are there instances where being tricked into
doing something is desired by the user?
Can interactions not designed to trick the user later become
dark patterns through tech infrastructure changes?
Aims
Connect Brignull’s typology
more strongly to existing
literature on ethics and values
Create more tractable
dark pattern categories for
practitioner use & interrogation
1
2
Aims
Connect Brignull’s typology
more strongly to existing
literature on ethics and values
Create more tractable
dark pattern categories for
practitioner use & interrogation
1
2
Corpus Generation
Collecting dark patterns exemplars.
CORPUS GENERATION
Search Process
Researcher 2
CS Background
API Bot
Crawling #darkpatterns
Researcher 1
UX Background
Commercial Sites BlogsSearch Engines Social Media
Corpus of “dark patterns” related artifacts
118 artifacts collected
from social media outlets
CORPUS GENERATION
45
from practitioner blogs40
from news outlets19
from personal product interactions10
from darkpatterns.org4
Corpus Analysis
Coding and categorizing the collected artifacts.
CORPUS ANALYSIS
Open Coding Approach
Brignull’s
Categories + Context
Interaction
Quality
Intended
User Group
=
Hierarchical
Themes
Reflecting
Designer
Strateg(ies)
Five Dark Strategies
Appearing to serve as strategic motivators in practice.
NAGGING OBSTRUCTION SNEAKING
INTERFACE
INTERFERENCE FORCED ACTION
1 Nagging
A minor redirection of expected functionality that
may persist over one or more interactions.
DARK STRATEGIES
1 Apple: iCloud Storage
NAGGING EXAMPLE
2 Obstruction
Impeding a task flow, making an interaction more difficult
than it needs to be, with intent to dissuade an action.
Brignull’s “Roach Motel”SUBTYPES
Brignull’s “Price Comparison Prevention”
Intermediate Currency
DARK STRATEGIES
2 Zynga: Unsubscribe
OBSTRUCTION EXAMPLE
3 Sneaking
Hiding, disguising, or delaying the divulging of relevant
information. Often intended to force uninformed decisions.
Brignull’s “Bait and Switch”
Brignull’s “Forced Continuity”SUBTYPES
Brignull’s “Hidden Costs”
Brignull’s “Sneak into Basket”
DARK STRATEGIES
3 Sleep Cycle:
“Free Trial”
SNEAKING EXAMPLE
4 Interface Interference
Privileging specific actions over others, thereby confusing
the user or limiting discoverability of important actions.
Brignull’s “Trick Questions”
Toying with EmotionSUBTYPES
False Hierarchy
Brignull’s “Disguised Ad”
Preselection
Aesthetic Manipulation
Hidden Information
DARK STRATEGIES
4 Two Dots: Muscle Memory
INTERFACE INTERFERENCE EXAMPLE
5 Forced Action
Requiring users to perform a specific action to access
(or continue to access) specific functionality.
Social PyramidSUBTYPES
Brignull’s “Privacy Zuckering”
Gamification
DARK STRATEGIES
5 Instagram: No
Option for “No”
FORCED ACTION EXAMPLE
darkpatterns.uxp2.com
CORPUS OF ARTIFACTS
Qualities & Breadth of Potential “Dark”ness
Reduction in user agency or 

action possibilities
Persuasion or dark patterns?
How to balance user and 

shareholder value?
Design Responsibility & Design Character
When does a pattern become dark?
Ethics codes generally conflate
designer intent and eventual use
Opportunities for ethical 

design leadership
Implications & Future Work
Moving forward.
UX Pedagogy & Practice
Increased ethical awareness in
design and UX education
Documentation of practice-based
ethical dilemmas
Criticality & HCI
Further integration and expansion
of value-centered methods in UX
Focus on applied, pragmatist
views of ethics in HCI research
and practice
THANK YOU
COLIN M. GRAY
colingray.me | uxp2.com 

gray42@purdue.edu
This research was funded in part by National
Science Foundation Grant No. #1657310

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The Dark (Patterns) Side of UX Design

  • 1. COLIN M. GRAY, YUBO KOU, 
 BRYAN BATTLES, JOSEPH HOGGATT, 
 & AUSTIN L. TOOMBS PURDUE UNIVERSITY The Dark (Patterns) Side OF UX DESIGN
  • 2. Increasing interest in critical/
 ethical aspects of HCI & UX
  • 3. Our Concern Ethics-focused methods are frequently bound to academia, making practitioner access to these conversations difficult, and activation of their implications problematic.
  • 5. Harry Brignull UX practitioner “A user interface that has been carefully crafted to trick users into doing things…they are not mistakes, they are carefully crafted with a solid understanding of human psychology, and they do not have the user’s interests in mind”
  • 7. EXPANDINGUPONBRIGNULL Which user or stakeholder interests are or should be kept in mind? What is the user being “tricked” into doing, and with what motivation? Are there instances where being tricked into doing something is desired by the user? Can interactions not designed to trick the user later become dark patterns through tech infrastructure changes?
  • 8. EXPANDINGUPONBRIGNULL Which user or stakeholder interests are or should be kept in mind? What is the user being “tricked” into doing, and with what motivation? Are there instances where being tricked into doing something is desired by the user? Can interactions not designed to trick the user later become dark patterns through tech infrastructure changes?
  • 9. EXPANDINGUPONBRIGNULL Which user or stakeholder interests are or should be kept in mind? What is the user being “tricked” into doing, and with what motivation? Are there instances where being tricked into doing something is desired by the user? Can interactions not designed to trick the user later become dark patterns through tech infrastructure changes?
  • 10. EXPANDINGUPONBRIGNULL Which user or stakeholder interests are or should be kept in mind? What is the user being “tricked” into doing, and with what motivation? Are there instances where being tricked into doing something is desired by the user? Can interactions not designed to trick the user later become dark patterns through tech infrastructure changes?
  • 11. Aims Connect Brignull’s typology more strongly to existing literature on ethics and values Create more tractable dark pattern categories for practitioner use & interrogation 1 2
  • 12. Aims Connect Brignull’s typology more strongly to existing literature on ethics and values Create more tractable dark pattern categories for practitioner use & interrogation 1 2
  • 13. Corpus Generation Collecting dark patterns exemplars.
  • 14. CORPUS GENERATION Search Process Researcher 2 CS Background API Bot Crawling #darkpatterns Researcher 1 UX Background Commercial Sites BlogsSearch Engines Social Media Corpus of “dark patterns” related artifacts
  • 15. 118 artifacts collected from social media outlets CORPUS GENERATION 45 from practitioner blogs40 from news outlets19 from personal product interactions10 from darkpatterns.org4
  • 16. Corpus Analysis Coding and categorizing the collected artifacts.
  • 17. CORPUS ANALYSIS Open Coding Approach Brignull’s Categories + Context Interaction Quality Intended User Group = Hierarchical Themes Reflecting Designer Strateg(ies)
  • 18. Five Dark Strategies Appearing to serve as strategic motivators in practice. NAGGING OBSTRUCTION SNEAKING INTERFACE INTERFERENCE FORCED ACTION
  • 19. 1 Nagging A minor redirection of expected functionality that may persist over one or more interactions. DARK STRATEGIES
  • 20. 1 Apple: iCloud Storage NAGGING EXAMPLE
  • 21. 2 Obstruction Impeding a task flow, making an interaction more difficult than it needs to be, with intent to dissuade an action. Brignull’s “Roach Motel”SUBTYPES Brignull’s “Price Comparison Prevention” Intermediate Currency DARK STRATEGIES
  • 23. 3 Sneaking Hiding, disguising, or delaying the divulging of relevant information. Often intended to force uninformed decisions. Brignull’s “Bait and Switch” Brignull’s “Forced Continuity”SUBTYPES Brignull’s “Hidden Costs” Brignull’s “Sneak into Basket” DARK STRATEGIES
  • 24. 3 Sleep Cycle: “Free Trial” SNEAKING EXAMPLE
  • 25. 4 Interface Interference Privileging specific actions over others, thereby confusing the user or limiting discoverability of important actions. Brignull’s “Trick Questions” Toying with EmotionSUBTYPES False Hierarchy Brignull’s “Disguised Ad” Preselection Aesthetic Manipulation Hidden Information DARK STRATEGIES
  • 26. 4 Two Dots: Muscle Memory INTERFACE INTERFERENCE EXAMPLE
  • 27. 5 Forced Action Requiring users to perform a specific action to access (or continue to access) specific functionality. Social PyramidSUBTYPES Brignull’s “Privacy Zuckering” Gamification DARK STRATEGIES
  • 28. 5 Instagram: No Option for “No” FORCED ACTION EXAMPLE
  • 30. Qualities & Breadth of Potential “Dark”ness Reduction in user agency or 
 action possibilities Persuasion or dark patterns? How to balance user and 
 shareholder value?
  • 31. Design Responsibility & Design Character When does a pattern become dark? Ethics codes generally conflate designer intent and eventual use Opportunities for ethical 
 design leadership
  • 32. Implications & Future Work Moving forward.
  • 33. UX Pedagogy & Practice Increased ethical awareness in design and UX education Documentation of practice-based ethical dilemmas
  • 34. Criticality & HCI Further integration and expansion of value-centered methods in UX Focus on applied, pragmatist views of ethics in HCI research and practice
  • 35. THANK YOU COLIN M. GRAY colingray.me | uxp2.com 
 gray42@purdue.edu This research was funded in part by National Science Foundation Grant No. #1657310