The level of expertise of your audience requires special attention. You should approach training for an expert and a novice in completely different ways.
Our working memory has limited capacity, holding four to five elements of new information at a time. Thus, it’s easy to overwhelm learners by topping up content that is already complicated with distracting animations. Moreover, disappearing information can’t be fully processed in the working memory, meaning it will be hard for employees to recall it when needed.
People learn better when two sources of information are combined, such as visual elements and speech.
Age, gender, look, attire, profession — all this is important because learners have to believe this character is an expert in the field.
These tests are especially effective for teaching certain behaviors, since they may be used to introduce additional examples and to see whether all is understood correctly, e.g. in an ethics course or a module on customer service.
If you want to maximize the effectiveness of feedback, introduce “delayed” explanation. According to the e-learning researcher Will Thalheimer, students who receive delayed feedback perform better during assessment by 10% - 25%.