If something is easy to read about, it seems easier to do. The simplicity or complexity with which a task is described affects our attitude towards the task itself and our willingness to do it. Psychologists gave college students information about exercise in either an easy to read font (Arial) or an unfamiliar "brushstroke" font; they found that those who read the instructions in Arial were subsequently more willing to make exercise a part of their day. Another way to introduce simplicity is to use simpler words and sentences. Commentators on the article in Scientific American Mind say that this points to the value of both clear textual presentation and graphic design (http://www.sciam.com/article.cfm?id=a-recipe-for-motivation).
Thanks to Margaret Cooter