Learn how iPad users interact with apps and websites on their devices, and whether usability improves with time as people practice and learn new interfaces. Check out these reports from NN/G (Nielsen Norman Group) reveals how people use tablet applications as well as how they use websites on tablets. (download files here)
The design guidelines are based on 2 rounds of usability studies, conducted one year apart. The researchers observed participants working on their own iPads to accomplish a broad variety of tasks.
Articles on research findings:
iPad Usability: First Findings From User Testing
iPad Usability: Year One
Although these reports aren’t the most up-to-date, it’s still worth remembering the lessons from the mistakes made in these early designs. If you don’t remember history, you’ll be doomed to repeat it. For the latest report, you need to purchase on NN/G website.