User Experience Design Case Studies & Practical Application 3 ā Questions and Answers
Question 1: A food delivery app notices users frequently tap 'Back' and re-enter the cart during checkout. What UX heuristic is most relevant to diagnose this behavior?
- Help and documentation
- Flexibility and efficiency of use
- User control and freedom with clear undo/redo (Correct answer)
- Recognition rather than recall
Correct answer: User control and freedom with clear undo/redo
Frequent back-navigation signals users lack confidence in their choices or can't easily edit; providing clear control and undo reduces this costly detour.
Question 2: In a comparative study, a card-sort exercise reveals users organize 'Account Settings' and 'Privacy Controls' separately, but the current IA groups them together. What should the team do?
- Keep the current structure since it is technically logical
- Align the IA to users' mental models by separating the two categories (Correct answer)
- Remove 'Privacy Controls' from navigation entirely
- Add a search bar instead of restructuring navigation
Correct answer: Align the IA to users' mental models by separating the two categories
Card sorting exposes users' mental models; when their grouping differs from the product's structure, the IA should be revised to reduce cognitive friction.
Question 3: A SaaS dashboard has a feature used by power users daily but discovered by only 10% of new users after 30 days. What is the most targeted fix?
- Delete the feature since most users never find it
- Use progressive disclosure or a coach mark to surface it during first relevant use (Correct answer)
- Add the feature to every screen permanently
- Send an email blast announcing the feature
Correct answer: Use progressive disclosure or a coach mark to surface it during first relevant use
Progressive disclosure or contextual coach marks reveal advanced features at the moment of relevance, improving discoverability without cluttering the interface.
Question 4: A travel app case study shows adding social proof (reviews count, traveler photos) to hotel cards increased booking conversions by 22%. Which psychological principle explains this?
- The Zeigarnik effect
- Social proof and conformity bias (Correct answer)
- The peak-end rule
- Anchoring bias
Correct answer: Social proof and conformity bias
Social proof leverages the tendency to trust the choices of others; showing that many travelers chose and reviewed a hotel reduces uncertainty and boosts confidence.
Question 5: During guerrilla usability testing at a coffee shop, a researcher notices that all 5 participants fail the same task. How should this finding be treated?
- Dismiss it because the sample is too small and informal
- Treat it as a strong signal warranting immediate investigation and lab follow-up (Correct answer)
- Report it as conclusive evidence requiring no further testing
- Average the failure rate across all tasks before acting
Correct answer: Treat it as a strong signal warranting immediate investigation and lab follow-up
When 5/5 informal participants fail the same task, the 100% failure rate is a strong qualitative signal that justifies prioritizing a formal testādespite the small sample.
Question 6: A redesigned news app increased session length from 4 to 9 minutes, but user satisfaction scores dropped. What does this pattern suggest?
- Longer sessions always indicate better UX
- The design may be using dark patterns that trap users rather than genuinely engaging them (Correct answer)
- Satisfaction surveys are unreliable metrics
- The app needs even longer sessions to succeed
Correct answer: The design may be using dark patterns that trap users rather than genuinely engaging them
Rising engagement alongside falling satisfaction is a red flag for manipulative design (dark patterns) rather than genuine value delivery.
Question 7: A government website case study found that replacing jargon-heavy labels with plain language reduced support calls by 40%. Which UX principle does this exemplify?
- Consistency and standards
- Match between system and the real world (Correct answer)
- Error recovery
- Aesthetic and minimalist design
Correct answer: Match between system and the real world
Nielsen's 'match between system and real world' heuristic states that systems should speak users' languageāplain words, familiar conceptsārather than system-oriented terminology.
User Experience Design Case Studies & Practical Application 3
A food delivery app notices users frequently tap 'Back' and re-enter the cart during checkout.
What UX heuristic is most relevant to diagnose this behavior?