Elements of IxD

On the UXMatters.com, Dan Saffer provides an excerpt of his upcoming book, Designing for Interaction: Creating Smart Applications and Clever Devices. In the excerpt, Dan describes the building blocks of interaction design:

• Motion
• Space
• Time
• Appearance
• Texture
• Sound

From the description of Time:

Time creates rhythm. How fast something pops up on the screen or how long it takes to complete an action like renewing your driver’s license controls the rhythm of the interaction. Games are often about rhythm: how many aliens come at you at any given moment, or how long does it take to complete a level. Rhythm is also an important component of animation: how quickly does a folder open or close on the desktop, how slowly does a drop-down menu slide open. Interaction designers control this rhythm.

David (heller) Malouf posted the additional elements of Context, Linguistics, and Dialog. Dan and Dave discuss these a little further in the comments.