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- + Single interface facilitates learning by doing: actions for all user groups are discoverable via exploration at PosterBoard
- + Single interface facilitates learning by watching: actions are performed in public and easily observed
- + Externally consistent iconography -- "plus," "magnifying glass" -- encourage exploration and facilitate interface learnability
- + Visual indication of USB port location from within the interface removes need to search (although a disconnect between the indication and physical location could result in worse learnability)
- + Metaphor to non-electronic poster board results in a logical extension for viewing posters
- + Additional poster actions availability upon touch provides good use of information scent as users "drill down" on specific interests
- + "Throbbing" animation encourages touch thus improving discoverability of the added functionality
- + Visual display of views encourages discoverability of touch actions
- ? Feedback -- capacative touch ideally facilitates this design, but use of a less responsive SmartBoard may result in issues with perceptual fusion
- - Metaphor to non-electronic poster board may be confusing for event organizers as it changes the mechanism for adding (virtual vs. staples)
- - Addition is unclearly indicated for this PosterBoard or all PosterBoards which may result in a system model which does not align with user model
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- + Consolidation of all actions into one interface results in a streamlined experience for users spanning multiple user groups
- + Expected size of posters and buttons is large enough that resulting pointing actions are efficient
- + Interactive forms for adding posters and continuous visual representation of displayed posters require little working memory on behalf of user
- + Multiple views allow event goers to explore the available information in the manner most personally efficient
- + Ability to add to calendar directly removes secondary interface traditionally required to perform such actions (e.g. use of cell phone)
- - No method for managing multiple posters simultaneously (e.g. a single user modifying two posters is no more efficient than two separate users)
- - Lack of explicit auto-complete for search provides mediocre search efficiency
- - Use of virtual keyboard for input on a vertical display is typically less efficient than using a keyboard
- - Use of virtual keyboard for search input is less efficient than traditional keyboard
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