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The Old Way Addresses Only One Channel
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If you choose not to address both the visual and verbal channels, you can see from the Notes Page view of a conventional slide shown in Figure 2-15 that you load up the slide area at the top with all of the information you want to communicate both visually and verbally. Because half of the available real estate available for information in Notes Page
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view is not used the off-screen text box below is empty the slide area becomes the single place to hold both spoken words and projected images.
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Placing all information on the slide area results in an overwhelming amount of information on the slide.
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When the text on screen is the same as what is narrated, it creates redundancy that reduces understanding. The busy slide splits attention from the speaker s narration.
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Not using the notes area ignores a critical source of information, the speaker s voice.
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FIGURE 2-15 The conventional PowerPoint approach does not incorporate the dual-channels concept and
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instead places both visual and verbal information in the slide area.
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When you do not align your PowerPoint approach with the dual-channels concept, you impair learning in a number of ways. For example, ignoring the off-screen text box creates a scarcity of resources in the slide area, which predictably produces overloaded slides. Words will usually take priority over visuals, so you will tend to see slides lled with text. Visuals added to these already crowded slides will usually shrink to the size of postage stamps so that they can be squeezed between the boxes of text. These dynamics produce slides that are overly complex and dif cult to understand. During a presentation, as the audience tries to make sense of the overloaded slide, they are not paying attention to the speaker. When they do shift attention to the speaker, they soon look back at the slide and work hard to try to synchronize the two sources of information. Researchers call this the split-attention effect, which creates excess cognitive load and reduces the effectiveness of learning. You can observe similar dynamics when
Trick 2: Use Notes Page View to Sync Pictures and Narration
2
you re watching a lm or TV show and the sound is slightly out of sync it s very noticeable because your working memory has to do the extra work of continually trying to synchronize the mismatched images and narration.
MYTH VS. TRUTH
Myth: I don t need to worry if what I say doesn t match up with my slide. Truth: Research shows that people understand a multimedia presentation better when they do not have to split their attention between, and mentally integrate, multiple sources of information.
Another problem with ignoring the off-screen text box in Notes Page view is that you do not recognize and plan for an incredibly rich source of information during PowerPoint presentations your own narration. The result is that the relationship between your spoken words and projected visuals is not fully addressed. Thinking of the slide area as the piece of paper rather than one frame in a lmstrip ignores this essential element of a live presentation your verbal narration. You might assume that the information can stand alone, without verbal explanation, but a PowerPoint slide does not exist in a vacuum you are standing there speaking to your audience while you project the slide. You must effectively plan how your spoken words and projected images relate to each other. And if you write nothing in the off-screen notes area, you will be unable to take advantage of Presenter view, as shown in Figure 2-16 and described in Appendix B on the companion CD, to manage your presentation because nothing will appear in the speaker notes pane on the right to guide you while you cover all the points you want to make.
AN INEFFECTIVE SCREEN AND HANDOUT
By addressing only one channel in your presentation, as shown earlier in Figure 2-15, you easily create split attention and redundancy in a live presentation. And by not capturing what is said verbally in the off-screen notes area, you also miss the chance to use PowerPoint for an effective handout that you could otherwise create by printing notes pages.
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