It's tempting to add exotic or humorous visuals to technical lessons to make them more interesting. This is especially true when designing multimedia self-study courses since high attrition rates suggest the need for extra motivational support. But some approaches to building interest are counterproductive to learning. In this chapter we present research, psychological rationale, and examples to support the following guidelines:
For learners with low personal interest in the training, use techniques to increase cognitive interest in the lesson
Draw on learners' personal interests by using visuals that make the relevance of the instruction obvious
Avoid Las Vegas approaches ...