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Describe the final design of your interface. Illustrate with screenshots. Point out important design decisions and discuss the design alternatives that you considered. Particularly, discuss design decisions that were motivated by the three evaluations you did (paper prototyping, heuristic evaluation, and user testing).
The user begins by arriving at the login screen. We aimed for simplicity in this screen: there is a login and create account tab. The create account tab has some features designed towards fast error detection, namely that a message will be displayed if the username is already taken, immediately as the user is typing; likewise if the repeated password doesn't match the original, a message appears when then user finishes typing (as opposed to only making these errors visible once the user clicks the create account button). During user testing, User 2 noticed the immediate detection of the mistyped password, and commented that it was a useful feature. Additionally, the login and create account allow for the keyboard to be used for efficiency; namely the user can tab through the input fields, and the user can press the Enter button as opposed to needing to click on the widget. During testing, Users 1 and 2 both created their accounts by pressing the Enter key instead of clicking the widget, so this feature turned out to be useful.
Implementation
Our user interface runs in-browser using Silverlight, and is implemented using C#. It uses Silverlight's layout system to organize the widgets, and is therefore resizable.
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