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Interaction | Action |
left click | select top card at location |
double left click | select entire stack of cards at location |
nothing selected, drag | select box |
card(s) selected, drag | move selected card(s) |
nothing selected, right click | nothing |
card(s) selected, right click | flip selected card(s) |
card(s) selected, right click hold | enter rotate mode |
With cards in player’s hand
* Note: In the hand, up cards are selected cards. Down cards are unselected cards.
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1. Shuffle the deck of cards
2. Deal deck of cards evenly to 3 other players
3. Play cards (as instructed by the facilitator)
Version 1 Testing
Observations
- User A felt our had difficulty selecting the entire deck and became visibly flustered
- Users B and C were surprised when single right click on a card flipped the card over rather than show a pop-up menu
- During dealing, Users B and C felt manually giving each player a single card sequentially was very inefficient, both asking “is there a faster way?”
- Users C had difficulties selecting 13 cards simultaneously from the stack using dragging
- User A and C expected to use the shift key in parallel with left clicking on cards to select multiple cards. Both were disappointed when nothing happened.
Usability Analysis
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Visibility
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- not all options visible. users had to explore and use trial and error
- ungreying of shuffle button not obvious
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Learnability
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- users had difficulty selecting groups of cards in a stack
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Efficiency
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- manual dealing took long time, “faster” method required verbal hinting
- playing multiple cards simultaneously from hand was enjoyable
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Errors
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- users expected right click to produce pop up menu, but card flipped instead. easily recoverable error however
Version 2 Changes (From Version 1)
We made three major modifications to the second iteration.
Modification 1) Pop-up Menu
- Right click on selected cards produces pop-up menu of options
Modification 2) Simpler group selection of multiple cards in a stack
- Left click on card in middle of stack inclusively selects all cards above
Modification 3) Quick play of cards in hand
- Double click on “down” card immediately plays that card. Double click on “up” card plays all “up” cards