Changes

====Usability====

====Usability====

OLPC places an emphasis on discoverability and usability due to our [[OLPC_Human_Interface_Guidelines/Design Fundamentals#Know_Your_Audience|target audience]]. Usability has everything to do with the actual behavior of the activities, the layout of the buttons and tools, and the feedback that the interface provides to the user through interaction.  Ultimately, the design decisions that make your activities usable will depend greatly on the type of activity you are developing, and it will be up to you to consider carefully the kinds of interactions users will expect when presented with it. As a general rule, if the interface provided does what the child expects it to, you are off to a good start.  However, since it is quite difficult to know what she will expect—and in practice not all children will expect the same things—there is no substitute for user testing.

OLPC places an emphasis on discoverability and usability due to our [[OLPC_Human_Interface_Guidelines/Design Fundamentals#Know_Your_Audience|target audience]]. Usability has everything to do with the actual behavior of the activities, the layout of the buttons and tools, and the feedback that the interface provides to the user through interaction.  Ultimately, the design decisions that make your activities usable will depend greatly on the type of activity you are developing, and it will be up to you to consider carefully the kinds of interactions users will expect when presented with it. As a general rule, if the interface provided does what the child expects it to, you are off to a good start.  However, since it is quite difficult to know what they will expect—and in practice not all children will expect the same things—there is no substitute for user testing.

====Simplicity====

====Simplicity====