Lecture: Introduction to Public Speaking & the Communication Process
Lecture script · about 15–20 minutes spoken · Week 1
Opening
Think about the last time you had to say something to a group and it mattered. Maybe it was a shift-change briefing at work, an answer in a job interview, or an announcement at a neighborhood meeting. You said the words. Did everyone walk away with the meaning you intended? Probably not everyone. That gap between what a speaker means and what listeners take away is what this whole course is about.
This is Week 1, so we start at the foundation. Nothing earlier is assumed, and you don't need any speaking experience. In this lecture I'll do six things with you. We'll define communication and public speaking. We'll build a six-part map of how a message travels. We'll sort the things that get in its way. We'll talk about what an honest speaker owes an audience. We'll deal with the nerves, which nearly everyone has. And we'll plan your first short speech and the practice habit that goes with it.
Next week, in Listening & Audience Analysis, we turn to the listener's side of that map. For now, let's start in a building lobby.
1. Communication is shared meaning
It's 8 a.m. in the lobby of a busy classroom building. A building manager leans into the lobby microphone and says, "The north lot closes at noon for repaving; please move your car to the south lot before noon." Every word comes out crisp and loud. And half the people in that lobby walk away without the message.
Nothing was wrong with the sentence. Something went wrong between the people. That's the plain idea I want you to hold on to: saying something is not the same as communicating it.
Here's the term. Communication is the process of creating shared meaning between people through words, tone, and gesture; it succeeds only when the receiver's meaning matches the source's closely enough to act on. Notice where the success test sits. It sits with the listener. The manager's goal wasn't a sentence. The goal was a lobby full of people who moved their cars.
Public speaking is one kind of communication with its own shape. Public speaking is a prepared, continuous message delivered by one speaker to an audience, in which the speaker carries the talk and the audience responds mostly without words. Three words carry that definition. Prepared means you plan it ahead. Continuous means you hold the floor for a while instead of trading lines. Audience means a group, not one friend across a table.
Here's a contrast. Picture a group text among four friends planning a birthday dinner. One friend writes, "fine, whatever works." One person reads it as agreement. Another reads it as annoyance. A few minutes later the thread is an argument. The words arrived perfectly. The meaning didn't.
Pause and try this. The lobby announcement was spoken in a crisp, loud voice and still failed for half the room. Was that a communication failure, and how do you know?
Take a moment and decide before I go on.
Here's the answer. Yes, it was a communication failure, because communication is judged by the meaning listeners end up with, and half the room didn't end up with it. A clear sentence is where the job starts, not where it ends.
2. The six-element model
To fix a message that fails, you need a map of its parts. This course uses a map with six labels. It's a classroom model, which means it's a simplification you can hold in one hand, not a description of every real conversation.
The six-element communication model is this course's classroom model of how communication works, built from source, message, channel, receiver, noise, and feedback. Let's walk the lobby announcement through it.
The source is the person who has an idea and encodes it into a message. That's the building manager. The message is the content itself: the north lot closes at noon, so move your car. The channel is the route a message travels, and here that's spoken words carried through the lobby speakers. The receiver is the person who decodes the message and makes meaning from it. That's each person in the lobby, including a first-year student who drove in for the first time. Noise is anything that gets in the way of shared meaning, and we'll sort it in the next section. And feedback is the receiver's verbal or nonverbal response, which the source reads and adjusts to. In the lobby, three people turn toward the microphone with puzzled faces, and one calls out, "Which lot is north?" The manager adds, "the lot beside the gym," and repeats the time. Feedback rescued the message.
Where did these six labels come from? Five came from what's called the linear model, a one-way picture drawn from Claude Shannon's 1948 paper, "A Mathematical Theory of Communication," and carried into communication studies by Shannon and Weaver's 1949 book. Feedback came from Wilbur Schramm's interactional model, in his 1954 essay "How Communication Works." Schramm also gave each person a field of experience, the background, knowledge, and culture each communicator brings, which shapes how a message is encoded and decoded. David Berlo's 1960 model named source, message, channel, and receiver, and added nothing new to our list. Then Dean Barnlund's transactional model, in 1970, changed the timing. Speaker and audience send and receive at the same time. That's the picture this course lands on.
Pause and try this. How many of the six elements came from the linear model, and how many came from Schramm?
Count them on your fingers if it helps.
Here's the answer. Five came from the linear model, source, message, channel, receiver, and noise, and one came from Schramm, feedback, so five plus one gives six. Barnlund adds none; he changes how we picture the timing.
3. Four kinds of noise
When most people hear the word noise, they think of sound. In this course, the word is wider. Noise is anything that blocks meaning, including what's going on inside a listener's body or head.
We sort noise four ways. Physical noise is a distraction in the setting. In the lobby, a leaf blower is running outside the doors. Physiological noise is a condition of the body. One listener skipped breakfast and has a headache. Psychological noise is a thought or feeling that pulls attention away. Another listener is rehearsing answers for a 9 a.m. exam. And semantic noise is a word, term, or label the receiver can't decode. The first-year student doesn't know which lot campus maps call north. The word arrived, and its meaning didn't.
So that's four items in four bins. Here's the part that surprises people. Only one of those four is a sound. The other three are silent.
One more distinction belongs here, because it trips people up. The channel is how a message travels. The message is what's said. If the manager had posted the same sentence on the lobby screen, the channel would change and the message would stay the same. If the manager had said "south lot" instead of "north lot," the channel would stay the same and the message would change. A microphone is part of the channel. It is never the message.
Here's why this matters for you as a speaker. You can't stop every leaf blower. But you can define a word your audience might not know, which cuts semantic noise. And you can repeat your key fact once near the end, which gives a distracted listener a second chance.
Pause and try this. A listener in the lobby is worried about a 9 a.m. exam and misses the announcement. Which kind of noise is that?
Name the bin before you hear mine.
Here's the answer. It's psychological noise, because the block is a thought, the exam worry, not anything in the room or the body. The room could be silent and that listener would still miss it.
4. Speaking ethically
An audience gives a speaker its attention and its trust. Ethical speaking is how you earn that trust and keep it.
Ethical speaking is speaking that is honest, prepared, respectful of the audience, and free of fabrication, with every source credited out loud. This course anchors its ethics in the National Communication Association's Credo for Ethical Communication, approved in 1999. It states nine principles, and the first names truthfulness, accuracy, honesty, and reason as essential to the integrity of communication. You'll find a link on the readings page, and it's worth reading in full.
For a speaker, that comes down to habits. Be honest. Be prepared. Name your sources out loud, so the audience hears where your words and facts came from. Week 4 teaches the full way to do that. And never make anything up.
Two words name the ways speakers break trust. Plagiarism is presenting someone else's words or ideas as your own. You can tell it by what the speaker does: delivering a speech someone else wrote, stitching passages together without credit, or using a quotation, a paraphrase, or an idea without naming the source out loud. Fabrication is making up a quotation, statistic, study, or source and presenting it as real, including passing along one a chatbot invented. It's a separate breach, and a more serious one, because it puts false information into the room.
Here's a short story. A resident is preparing a two-minute comment for a neighborhood meeting about a new crosswalk. The resident asks a chatbot for a statistic about crosswalk safety. Back comes a sentence with a percentage, a study title, an author, and a year. It looks complete. But chatbots asked for statistics return citations that look complete, and some of them don't exist. So the resident looks for the study. If it's real and says what the chatbot claimed, the resident can name it. If it can't be found, the number doesn't get said.
Pause and try this. A speaker reads aloud a paragraph from a news article without saying where it came from. Is that plagiarism or fabrication?
Decide which word fits the action.
Here's the answer. It's plagiarism, because the words are real but the speaker used them without naming the source out loud. Fabrication would mean the words or facts were invented.
5. Nerves are normal
If your heart speeds up when you picture yourself speaking to a class, you're in very large company. Speaking nerves are common, and they're manageable.
Here's the term. Communication apprehension is James McCroskey's term for a person's fear or anxiety about real or anticipated communication with another person or persons. He set out the idea in 1977. It's common and manageable, and it's not a diagnosis. McCroskey also built a 24-statement questionnaire called the PRCA-24. This course names it, and nobody here is asked to take it or graded on it.
Notice the word anticipated. A lot of the nervousness comes before you speak, while you're imagining it. That's useful, because it means the feeling often peaks early and eases once you start.
What helps? Practice out loud, because silent reading isn't rehearsal. Treat the adrenaline as energy, since a racing heart is the same signal as excitement. Slow your breathing. Picture the speech going well. Put your attention on the message and the listeners instead of on yourself. Find a few friendly faces. And expect the nerves to peak early and then ease.
You may have heard that people fear public speaking more than death. That line doesn't hold up. It traces to a 1973 survey that had people pick fears from a list without ranking a top fear, and to a comedian's joke that built on it. In 2012, Dwyer and Davidson tested the claim with college students. Public speaking was the fear most often selected, while death was most often named as the single greatest fear. So speaking nerves are very common, and they aren't stronger than the fear of dying. That's good news. A common fear is a shared one.
Pause and try this. Someone tells you good speakers don't get nervous. Based on what you've heard, what would you say back?
Put it in one sentence of your own.
Here's the answer. Most good speakers do feel nervous; they've learned to give the nerves a job, like practicing aloud and slowing their breathing. Nervousness is a sign the speech matters to you, not a sign you're bad at this.
6. The icebreaker and the rehearsal loop
Your first speech in this course is the icebreaker. An icebreaker speech is a short first speech that introduces the speaker in four beats: a hook, who you are, one detail with a point, and a close. The hook earns attention. Who you are gives the plain facts. The detail is one specific story that shows something about you, plus the sentence that says what it shows. And the close ties back to the hook.
How will you deliver it? There are four delivery methods, and Week 9 teaches them in full. Manuscript means reading word for word. Memorized means reciting without notes. Impromptu means speaking with little or no preparation. And extemporaneous delivery is speaking from brief notes after careful preparation and practice, so the words come out conversationally rather than read or recited. That's our target. Please don't memorize your icebreaker word for word. Know the four beats, and let the exact words come fresh.
Practice works best as a loop. The rehearsal loop is the practice cycle of recording a take, watching it, naming one specific moment to fix, and recording again. The key word is moment. "It went okay" is a feeling. "I looked at my card after every sentence in the first minute" is a moment, and you can fix a moment.
Here's an illustrative first take from a six-minute speech. The speaker said 780 words in 6 minutes, so 780 divided by 6 is 130 words per minute. They used 12 filler words, so 12 divided by 6 is 2 fillers per minute. In a 30-second sample they looked up for 21 seconds, which is 70 percent of the sample. They paused on purpose 9 times. And the one thing to fix was this: pause after the hook instead of racing into the central idea. None of those numbers is a target. They describe one take.
If you'd rather not be on camera, record audio only; every measure except eye contact still works. Your recording stays with you, and you never need to share it with a chatbot. That matters, because a chatbot can't watch you. If you describe your take and it says "great job, very engaging," that names no moment. It's praise, not feedback.
Pause and try this. A chatbot tells a speaker, "Nice energy, work on your delivery." Is that useful feedback for the next take?
Think about what the speaker could actually change.
Here's the answer. No, because it names no moment in the recording, so there's nothing specific to fix. Useful feedback sounds like the take's last line: pause after the hook.
Closing
Let's pull it together. Communication is shared meaning, and a clear sentence can still fail. The six-element model maps source, message, channel, receiver, noise, and feedback, and the transactional picture says you're always sending and receiving. Noise comes in four kinds, and only one of them is a sound. An ethical speaker is honest and prepared, names sources out loud, and never fabricates. Nerves are normal; give them a job. And your icebreaker has four beats, practiced in a loop that names one moment at a time.
Next in this module come the Readings & Resources page, the lecture tutorial, the practice set, and the quiz. Then next week, in Listening & Audience Analysis, we move to the receiver's side of the map: what it takes to really listen, and how to learn who your audience is.
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