The field of education has also benefited from research in the areas of sensation and perception. Knowing how young children perceive educational materials is important in developing ways to increase their skills and motivation. Textbook publishers have found that materials need to be visually attractive to children in order to help them focus on activities. Graphics and illustrations help the young learner to understand written materials. Size of printed text is also important to accommodate the developmental level of the student. For example, primers and primary-level reading series typically have large print, to assist the student in focusing on the text. As the child's abilities to discriminate letters and numbers become more efficient with age, the print size diminishes to that of the size of characters in adult books. Similar techniques continue into high school and college; especially in introductory courses, the design of texts use extensive amounts of color, along with variation in page design. The reader's eyes are attracted by numerous stimuli to pictures, figures, definitions, and charts strategically placed on each page. This technique allows the author to highlight and accent essential points of information.
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