stanford hci group / cs376 Adaptive Interfaces Nathan Sakunkoo

Today’s Readings  Ephemeral Adaptation ‘09 - Interaction  Mixed-Initiative UI ’99 - Agent  Recommender Systems ‘97 – Design Space

Ephemeral Adaptation  Spatial Form  Examples: XP Start Menu  Lacks spatial consistency  Not so effective except in certain conditions  Graphical Form  Examples: color highlighting  Temporal Form: this paper

Ephemeral Adaptation: Main Points  Good performance when prediction algorithm accuracy is high.  Not so poor performance when accuracy is low.  Pilot study with Abrupt Onset- Discouraging  Gradual onset:  Methods: 2 experiments, 48 users  Study 1 Findings: Ephemeral is faster than static menu, Ephemeral is preferred to control (esp. for high accuracy)  Study 2 Findings: Ephemeral faster than Highlight, but not preferred to Highlight – WHY?

Ephemeral Adaptation: Discussions  Overall  Results  Methods  Applications

Overall  Clarity: The structure of the paper, however, was very clear, the methodology was very transparent, and this made their findings very accessible. – Eyal  Recency: CHI 2009! Wow, its good to see a 2009 paper after reading papers from the 40s and 70s. - Akshay Average Rating – 3.96

Performance Gain Result  shaving a 100ms off of a menu selection task doesn't feel that compelling – Jesse  wasn't clear that the performance gains were substantive enough – Mike  not sure how much speed savings is considered good enough – Sharon

Preference Result  Subjective  try to please researcher  prefer fancier interface in the short-term  could be valuable to delve deeper into the specifics of what made each more satisfying  is 7 vs. 3 that significantly different from 5 vs. 4? - Patty

Methods Focused, sounded, and thorough Missing broader issues - Kelly Controlled experimentWant to see Realistic settings - Eyal Others?

Applications In which kinds of interfaces/tasks would Ephemeral Adaptation be applicable and in which kind would it not?  Webpage – NY Times  MS Office – Menu  Everyone hates MS Does Microsoft employ similar techniques for their products?  How well do these experiments translate to real user satisfaction in software products? – Reid  Others

Principles of Mixed-Initiative UI

Summary  Mixed Initiative UI = Agent + Direct-manipulation  Interfaces that enable users and agents to collaborative effectively  12 principles learned from LookOut  Developing significant value-added automation  Considering uncertainty about a user’s goals  …  Methods on managing uncertainties  Based on expected utilities

Recommender Systems – ‘97  Design Space  Domain Space  Social Implications  Incentives  privacy

Design Space

stanford hci group / cs376 Thank you.