Mail box notifies Joe that there are Click on the mail box to view the offers available list of available offers
View Rei's offer by clicking on Rei
| The mail box animation pops up when there are offers available to Joe. Upon clicking on the mail box, Joe sees the list of offers.
To view Rei's offer, he clicks on Rei's picture and sees the location information that Rei wants from him in exchange for the 10% discount.
In this scenario, Joe realizes the information he will be exposed to Rei by his own example. LocaShare mines for Joe's past locations and visualizes the information he is about to share. Joe can choose to "Accept" the offer or "Cancel" it.
| Pros: 1. Mail box animation is a good metaphor for receiving a notification. Joe can easily understand that there are things available to him. 2. Joe can easily learn the information he will provide to the Rei by his historical location information. Learn by example my own example is an effective way to teach user what will happen if I accept the offer. 3. The ">" button on each of the offer item is consistent with other smart phone apps which indicates that there are more detailed information. | Cons: 1. If the list of offers is long, scrolling down the long list might be cumbersome. Would be better to aggregate the offers by grouping them into various categories.
| Errors can result by clicking "Accept" or "Cancel" too quickly. However, this can be easily resolved by providing an alert menu to confirm with user again. Besides, user can always terminate this offer by going to the "My deals" page.
| The mail box animation provides high visibility. |