Public Speaking

Linear Model (Hypodermic Needle) and Early Two-Way Model

  • Linear model: source → message → channel → receiver; feedback is minimal or separate. Also known as the hypodermic needle model.

  • Limitations: not sufficient to explain miscommunication or channel effects; assumes a straight line from sender to receiver.

  • Public-speaking context similarity: channel (visuals, verbal/nonverbal cues) can alter interpretation.

Interactional Model (1954)

  • Two-way interaction: encoder sends a message, receiver decodes and responds; feedback exists but is still interpreted through shared fields of experience.

  • Encoding/decoding matter: words chosen by the sender may be interpreted differently by the recipient.

  • Based on field of experience: our background shapes how we encode and decode messages; miscommunication arises when experiences diverge.

  • Example-driven: accents, regional language, and formal/informal word choices affect judgments by others.

Transactional Model (Dean Barnlund, 1970)

  • Communication is simultaneous and coconstructed by all participants.

  • Meaning is created through interaction; what matters is how others understand the message, not just what was meant.

  • Includes noise and context; emphasizes that feedback and interpretation happen in real time.

Channel, Medium, and Context

  • Channel = method of communication (face-to-face, email, texting, billboard, etc.).

  • Channel changes the nature of the message (online tone vs. in person; public speaking with visuals vs. text).

  • Context (physical, social, cultural) shapes interpretation and appropriateness of responses.

Signs vs Symbols

  • Signs: direct relationship to what they refer to (footprints = something was there; crying = upset).

  • Symbols: arbitrary; meanings are assigned by users and can vary across cultures and contexts (names, gestures, words).

Field of Experience and Cultural Context

  • Encoding/decoding is shaped by personal and cultural experiences.

  • Shared experience reduces miscommunication; different backgrounds can lead to misinterpretation.

  • Example: word choices and conventions (e.g., y'all) depending on audience and setting.

Language, Meaning, and Change (Sabre–Wirth Hypothesis)

  • Language reflects reality and shapes reality: words express beliefs and influence perceptions.

  • Loaded language: strong positive/negative connotations that frame debates (god terms vs devil terms).

  • Examples:

    • Climate terms: "global warming" vs "climate change";

    • Political labels: "pro-life" vs "anti-life"; "freshman" vs "first-year student"; "Congressman/Congresswoman" vs "Congressperson".

  • Language evolves with culture; names and labels influence attitudes and policy.

Inclusive Language and Social Awareness

  • Avoid heterosexist and gender-biased terms (firefighter vs fireman; congressperson).

  • Be mindful of terms that demean or stereotype (enslaved vs slave; terms with racist/homophobic connotations).

  • Context matters: adapt language to audience to reduce harm and improve clarity.

  • Mental health and awareness: inclusive language can affect LGBT+ individuals; include supportive terms and resources (e.g., 988 for crisis support).

Evidence, Credibility, and Sources

  • Facts vs statistics: facts are verifiable; statistics are predictive or inferential and should be explained.

  • Use statistics sparingly; avoid overwhelming audiences and ensure ethical use.

  • Expert testimony: assess expertise, potential bias, and recency.

  • Media credibility: consider source bias and reliability; use diverse, credible sources.

Narrative vs Evidence in Speaking

  • Narratives are engaging and emotionally persuasive; can function as attention getters, bookends, and evidence.

  • Stories help audience relate and remember; aim for relevance and credibility (ethos).

  • Tenets: use narrative to connect personally to the topic (why you care).

Supporting Materials (Eight Types)

  • Narrative: story-based evidence; engaging and memorable; can illustrate points and motivate.

  • Facts and statistics: verifiable data; explain and contextualize; use sparingly.

  • Comparison: explain new ideas via analogy; simplify complex concepts; aid decision-making.

  • Description: vivid sensory detail to illuminate ideas; avoid vague wording; use strong verbs.

  • Memorization strategies: mnemonics, repetition, and memory aids (e.g., CPR/ABCs as a memory cue).

  • Definition: denotative (dictionary) vs connotative (emotional/associative) definitions; clarify audience understanding.

  • Expert testimony: rely on qualified sources; assess objectivity and timeliness.

  • Examples: concrete instances to illustrate points (illustrative anecdotes, demonstrations).

Narrative Techniques and Language for Public Speaking

  • Use description and sensory detail to make messages vivid and memorable.

  • Avoid over-reliance on adverbs; prefer vivid verbs and specific imagery.

  • Build ethos and engagement with personal relevance and credible storytelling.

Visual Aids and Outlines

  • Visual aids: large enough, simple, not overcrowded; keep backgrounds light; avoid distracting visuals; cite sources on slides.

  • Do not pass aids around during the talk; use them strategically.

  • Outlines: two outlines required – content outline (complete sentences) and speaking outline (brief prompts).

  • Do not read verbatim; practice transitions and endings; prepare a strong opening and a memorable closing.

Citing Sources and Ethics

  • Cite sources when evidence is used; do not rely on a single reference.

  • Ensure readability and transparency in the bibliography; adapt to audience and assignment needs.

Practical Notes for Presentations

  • Use a single, clear thesis; ensure main points support and do not contradict.

  • Prepare for delivery: practice transitions, recover from mistakes, and maintain confidence.

  • The instructor emphasizes aligning thesis, main points, and supporting material with the assignment goals.