Picking the right sources for a persuasive speech is extremely important. You don't want to settle for weak support. Choose research to support your points that you think has the most potential to persuade your audience.
Below, Dr. Lee McGaan of Monmouth College explains the types of support you can use in your argument. You can use your research to develop each type of support.
Use a Variety of Support Material
There are a variety of types of support material which can be used to illustrate or prove points you make. The following kinds of materials are commonly used to support assertions in speeches:
Good micro-structure REQUIRES that you have support for every point (assertion) you make. However, it is also valuable to use as many different types of support material as you can. A speech that is mostly statistics or only explanation is almost certainly going to be less interesting to the audience than a speech which includes stories, quotations, analogies, and examples as well as statistics or explanation. In fact, overuse of explanation is a very common weakness in speeches.
A variety of support types not only helps keep listener interest, it also builds you credibility. Research shows that speakers who use many kids of support are judged to be more knowledgeable than those who don't and are regarded as better speakers. Beginning with your second speech we ask you to label the type of each item of support you use in your outline as a way of encouraging you to avoid having only having a limited variety of support in your speech. Your intstructor will discuss ways you can increase the variety of support in your messages; however, the most important factor in getting wide variety of support is obtaining several diffrent kinds of information sources on your topic. By all means avoid speeches based solely on "personal knowledge."
Use Support Material Effectively
Merely having a variety of good support material doesn't guarantee that the audience will understand or be convinced of your point. You must use support well.
STEP 1. State the point (assertion) you wish to make/prove/illustrate. While this seems obvious sometimes speakers state a statistic or begin a story without indicating what their point is, assuming the audience will draw the right conclusion. The problem is your audience may not see the point you think is obvious. Be clear. Make your point stand out as you deliver it so the audience will recognize it as important.
STEP 2. Present support material (one or more items) which clarifies, illustrates, or proves (convinces) your assertion. Use the support to develop your idea taking enough time to let the point "soak in."
STEP 3. Show how the support material clarifies or proves your assertion by a) summarizing the point, or b) explaining the link between support and assertion. At the very least you should remind listeners of your point after you present the support material to reinforce what you want them to remember. This may seem repetitious to you but it won't to your audience. They may not have gotten the assertion in step 1 and need a summary. Sometimes you may need to do more than summarize. The audience may not be able to see how your support proves your point (this is especially true when the support is statistical). When that is possible you should be sure to explain the link as well as summarize.
An Example from a Student Speech
Step 1. Cardiovascular disease, the nation's leading cause of death, is caused by inactivity.
Step 2. Clogged arteries and veins are a result of inactivty. (example) Excess fat also caused by inactivty leads to a higher incidence of heart disease. (explanation and example)
Step 3. Statistically, then, you will die at an earlier age if you do not exercise. (internal summary)
Last updated 3/3/2000
"All that glitters is not gold"---and this is true with the sources you find, whether they be from a book, a library database, or Google. You can use the 5 Ws + How to help you decide whether or not you should use a source:
Who
What
When
Where
Why
How