Creating an Informative Speech

As you’ll recall from Chapter 9 "Preparing a Speech", speaking to inform is one of the three possible general purposes for public speaking. The goal of informative speaking is to teach an audience something using objective factual information. Interestingly, informative speaking is a newcomer in the world of public speaking theorizing and instruction, which began thousands of years ago with the ancient Greeks.Thomas H. Olbricht, Informative Speaking (Glenview, IL: Scott, Foresman, 1968), 1–12.Ancient philosophers and statesmen like Aristotle, Cicero, and Quintilian conceived of public speaking as rhetoric, which is inherently persuasive. During that time, and until the 1800s, almost all speaking was argumentative. Teaching and instruction were performed as debates, and even fields like science and medicine relied on argumentative reasoning instead of factual claims.

While most instruction is now verbal, for most of modern history, people learned by doing rather than listening, as apprenticeships were much more common than classroom-based instruction. So what facilitated the change from argumentative and demonstrative teaching to verbal and informative teaching? One reason for this change was the democratization of information. Technical information used to be jealously protected by individuals, families, or guilds. Now society generally believes that information should be shared and made available to all. The increasing complexity of fields of knowledge and professions also increased the need for informative speaking. Now one must learn a history or backstory before actually engaging with a subject or trade. Finally, much of the information that has built up over time has become commonly accepted; therefore much of the history or background information isn’t disputed and can now be shared in an informative rather than argumentative way.