While it was long believed that greater realism in graphic depiction would add to the value of the picture, the degree of realism depends totally on the objectives established. A more realistic picture or diagram may be more appropriate for achieving some objectives, while a simplified illustration may be much clearer assisting in a different objective. If a program includes demonstrations, only basic elements of what is to be demonstrated should be included, however, complete simplification may not be adequate to meet the objectives. When specific terms are to be emphasized and retained by the learner, both visual printing and verbalization of the terms is advised. Special visual and sound effects, while helping to establish a mood and capture attention, may not directly increase learning.
Some verbalization is better than none, since most visuals have many interpretations.