Final answer:
To maximize audience retention, include three to five summary points on the final slide of a presentation, which aligns with recommended presentation structure. This helps prevent cognitive overload and ensures the audience retains the key messages.
Step-by-step explanation:
When considering the optimal number of summary points to include on the final slide of a presentation, it is typically recommended to adhere to the rule of thumb that a presentation should contain an introduction, three to five major supporting points, and a conclusion.
Hence, to ensure retention by the audience, a maximum of three to five summary points should be included on the concluding slide.
This keeps the information clear and digestible, preventing cognitive overload on the part of the audience. Moreover, PowerPoint lecture slides often include main points, key concepts, and a summary to help structure the presentation and support retention of information.
By concluding with a review of these main points, you reiterate the most crucial information, enhancing the likelihood that the audience will remember the key messages of your presentation.