Scenario: Play round of bridge
Scenes:
- 4 users agree to play bridge (Harrison, Jack, Tuan, David). teams are Harrison and Tuan vs Jack and David
- all users sit down at a table
- Harrison is dealer, chosen at random, first shuffles deck of cards
- Harrison distributes deck of cards evenly to all players with cards faced down
- after all cards have been dealt, person to left of dealer (Jack) begins bidding process by calling a suit and number (1Heart)
- bidding occurs in left to right order. Tuan calls 1 spade. David calls 2 clubs. Harrison passes. Jack passes. Tuan calls 2 spades. Everyone passes.
- Harrison is dummy
- David starts with ace of clubs
- Tuan chooses to play for Harrison, 3 of clubs.
- Jack plays 7 of clubs.
- Tuan plays 2 of spades.
- Tuan wins round, takes trick.
Design A:
Learnability
- pros: affordances for highlighting selection
- cons: user must discover actions by experimentation
Efficiency
- pros: very, types of clicks map to set actions (ie single click selects top, double click all)
- cons: natural constraints on actions (ie pick random card from deck)
Visibility
- pros:** staggered stack,
- names are color coded to distinguish user specific selection
- user color on cards played will fade over time
- cons: user most discover some options
Errors
- pros: no need for undo - easy to fix with next action
- cons: may be hard to select certain cards
Design B
Storyboard
- Scenes 1-4) Dealing
- Scenes 5-6)Bidding
- Scene 7) Group Select
- Scenes 8-12) Stackify
Usability Analysis
Learnability
- pros: options are made visible via circular pop up
- cons: terminology (ie stackify)
Efficiency
- pros: dealer privileges might speed up big actions via buttons
- cons: making large stacks is tedious (lots of clicks)
Visibility
- pros:** mouse cursor changing to express object interaction** stack size numbers attached to each stack** glowing card selection
- cons: hard to tell owner of last played card
Errors
- pros:
- cons: hard to correct mispressed card for stacking
Design C
Storyboard
- Scenes 5-6) Bidding
- Scenes 8-12)Collecting
Usability Analysis
Learnability
- pros: very simple,
- cons: no notion of hands, actions must be discovered
Efficiency
- pros: hotkeys to select card and mode
- cons: all players must unanimously vote to approve global modes
Visibility
- pros: right click shows drop down menu of options
- cons: display of card is universal
Errors
- pros: all actions are easily undo-able
- cons: lots of selection errors but easy to undo. mode errors likely but undo-able