Gillian prepared beautiful photographs in PowerPoint to illustrate various parts of her speech about the Milky Way. When Gillian finished explaining each photograph, she left it on the screen for her audience to study until it was time for the next slide. Did Gillian make any mistakes in her use of visual aids?

Yes. She should have displayed blank slides between the photographs.

Explanation:

Visual aids are more practical and useful when they are displayed exclusively at the same time the speaker is explaining or deliberating them. In that respect, visual aids are supposed to complement and clarify the arguments or concepts discussed by the speaker. As a consequence, it is not adecuate to display a photograph after the speaker has finished talking about it.

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