This article was written by Mark Notess, Indiana University and published by eLearn Magazine: "I recently sat with a nonagenarian relative, trying to teach him how to use a program for designing and printing greeting cards. He spent all afternoon rehearsing the steps I'd shown him, hoping he would remember. I could tell this experience was difficult for him. His mind is still sharp and his memory good. But he had trouble remembering and executing all the mouse movements and keystrokes. Also, some of the interface concepts were incomprehensible to him: Why did he have to scroll through a list, select something, and then click a button?"
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