Notes on Formulating General Purpose, Specific Purpose, and Central Idea

Topic: Formulating General Purpose, Specific Purpose, and Central Idea

• Goal of today’s guidance

  • Provide a reliable way to formulate ideas for speeches and outlines
  • Outline structure at the top of your outline helps future speeches
  • Focus on topic selection, purpose statements, and central ideas to stay on track

• Topics and purpose statements: why they matter

  • Choosing a topic can be facilitated by several approaches:
  • Self inventory: reflect on what you can write or talk about with authenticity
    • Consider: passions, background, culture, interests, major, pastimes, family context
    • Writing or talking about what you know is often more effective
  • Trying something new: pick a topic you’re curious about (e.g., Hawaii, crocheting) and research it
  • Brainstorming: a broad, scattershot idea generation to see where it leads
  • In-class exercise: small-group brainstorming with labeled topics (A, B, C, D, E) to practice generating ideas; review after ~30 minutes

• The three top elements at the outset of every outline

  • 1) General Purpose: the broad goal of the speech (the audience outcome)
  • 2) Specific Purpose: a single infinitive phrase that narrows the goal (what you will accomplish for the audience)
  • 3) Central Idea: a single, grammatically correct sentence summarizing the major idea and signaling the main points

• Understanding the General Purpose

  • It’s the broad goal you want for the audience in two words, often expressed as an infinitive
  • Examples: to Inform, to Persuade, to Entertain, to Commemorate, to Celebrate, to Warn
  • Practical guidance:
  • Identify whether your aim is to inform, persuade, introduce, entertain, or commemorate
  • Consider whether the assignment or course context requires a specific type (e.g., an informative vs. commemorative speech)
  • Think about audience impact: what should the audience take away?
  • Note: For some speeches, you may start with a general purpose (e.g., Introduce) and refine as you proceed

• Formulating the Specific Purpose

  • Build from the General Purpose: add a more explicit outcome
  • Requirements:
  • Phrase as a full infinitive clause beginning with a verb like to inform, to persuade, to entertain, etc.
  • It should be a statement, not a question
  • Avoid figurative language
  • Focus on one distinct idea; avoid overly broad or vague aims
  • Structure: extend the general purpose with a precise endpoint
  • Examples illustrating refinement:
  • Topic: avalanches
    • General: Inform
    • Specific: to inform my audience about the three major kinds of avalanches
    • Research avenues: areas in the world with the most avalanches, history, warning signs
    • Note: keep scope tight to three main types for clarity
  • Topic: Dia de los Muertos (Mexico)
    • General: Inform
    • Specific: to inform my audience about the history of Mexico's Dia de los Muertos celebration
    • Possible refinements: divide into eras, regional practices, and common misconceptions
  • Topic: campus parking policy
    • General: Persuade
    • Specific: to persuade my audience that the campus policy on student parking should be revised to provide more spaces for students before 5 PM
    • Central idea should outline concrete measures
  • Avoid the following pitfalls:
  • Turning the purpose into a broad question (usually weak and unfocused)
  • Trying to accomplish too much in a short time (three main points is a practical target)
  • Using vague terms like something should be done without specifying what or how
  • Examples of stronger specific purposes:
  • To persuade my audience that each state should create a nonpartisan commission to establish criteria for congressional redistricting
  • To inform my audience about the health benefits of parkour
  • To inform my audience about the history and three main kinds of avalanches

• The Central Idea (the thesis)

  • One sentence that encapsulates the major idea and previews the main points
  • Characteristics of a strong central idea:
  • It is a single, complete sentence (not a question)
  • It clearly previews the main points (usually three)
  • It is grammatically complete and balanced
  • It ties directly to the Specific Purpose
  • Examples:
  • Parkour (inform):
    • Central idea:
    • "Parkour offers health benefits through developing cardiovascular endurance, boosting self-confidence, and enhancing coordination."
    • Observations: uses three parallel verbs with consistent structure: developing, boosting, and enhancing
  • Nanorobots (inform):
    • Central idea: "Nanorobots are being developed for use in medicine, weaponry, and daily life."
    • This central idea then flows into three main points: medicine, defense/politics, and consumer life
    • The pattern of three parallel elements helps with transitions: in addition to using them in medicine, nanorobots can also help in defense and in daily life
  • Costa Rica (persuade):
    • Central idea: "Costa Rica has many attractions for vacationers, including spectacular beaches, lush rainforest, and stunning mountains."
    • Balanced phrasing with three modifiable focal points (beaches, rainforest, mountains)
  • Studying abroad (persuade):
    • Central idea: "Studying abroad helps students expand their cultural horizons, develop their language skills, and enhance their employability."
    • Three parallel benefits, each introduced by a verb (expand, develop, enhance)
  • Important notes:
  • The central idea should be derived from the specific purpose; it serves as a thesis and a preview
  • It should be able to guide the organization of three main points
  • It should avoid flowery language or mere opinion; focus on concrete claims that can be supported with evidence

• How the three elements relate to organization and research

  • The central idea helps you decide what evidence and examples to collect
  • If research reveals more material than your three points can cover, you must narrow or choose another focal angle
  • A central idea that is too broad (e.g., "What are nanorobots?") is ineffective; instead specify the scope and purpose (e.g., three applications in medicine, defense, daily life)

• Balancing the three main points

  • A good central idea often yields exactly three main points (three is a “magic number” for memory and structure in speech and essays)
  • Too few main points may oversimplify; too many may overwhelm the audience or exceed time limits
  • Examples of three clear points: (1) historical context, (2) current practice, (3) modern implications or misconceptions

• Variations and transitions: turning the outline into a flow

  • Transitional cues connect main points (e.g., “in addition to …,” “similarly, …,” “another example is …”)
  • The center idea provides a natural path for transitions between points
  • When you present, you can reference the central idea in your introduction and then remind the audience of it as you move through the main points

• Special notes on assignment alignment and audience awareness

  • Always check if the specific purpose matches the assignment (inform, persuade, commemorate, etc.)
  • Ensure you can accomplish the specific purpose within the time limit (e.g., a 3-minute speech)
  • Consider audience relevance: make your topic and purpose engaging and meaningful to them
  • Avoid being overly technical for a general audience; tailor depth to the audience’s background
  • Avoid trivial or overly broad topics; aim for relevance and clarity

• Practical tips for turning ideas into an outline

  • Start with a topic and create a general purpose
  • Develop a specific purpose as a concise, two-part statement (the general purpose plus specific outcome)
  • Draft a central idea that previews three main points and is testable or demonstrable
  • If the topic evolves during research, revise the central idea and main points to maintain focus
  • Use a three-part structure for clarity and memorability (intro, three main points, conclusion)

• In-class activity recap (group exercise excerpt)

  • Groups were given topics and asked to brainstorm topics labeled A–E
  • Task: identify general purpose, formulate a specific purpose, and propose a central idea
  • Example transcripts from exercise:
  • Zoos and animals (topic: animals)
    • General purpose: Persuade
    • Specific purpose: To persuade our audience that zoos are harmful to animals
    • Central idea: Zoos are harmful to animals because they are not in their natural habitat, they are held in small enclosures, and they lack interaction with other animals
  • Basketball as a topic (topic: basketball)
    • General purpose: Persuade
    • Specific purpose: To persuade our audience that basketball emphasizes competitive teams and fast-paced games, appealing to a diverse audience
    • Central idea: Three focal areas forming the argument
  • Environment (topic: environment)
    • General purpose: Inform or persuade depending on direction
    • Specific and central ideas developed accordingly to emphasize three-part structure
  • Takeaway from exercise: clarity of purpose and consistency of language help determine three main points and the overall stance

• Final guidance for your own preparation

  • For next week, teachers expect a focused theme about yourselves, not just three arbitrary facts
  • Your narrative should connect your three objects or experiences to a single central idea or purpose
  • You are in control of your narrative; use that control to craft a cohesive, engaging introduction, body, and conclusion
  • Practice the process of refining general purpose, specific purpose, and central idea to ensure a clear and focused message

• Quick reference checklist

  • [ ] General Purpose identified (inform, persuade, entertain, commemorate)
  • [ ] General Purpose expressed in two words (infinitive form)
  • [ ] Specific Purpose present as a full infinitive phrase (not a question)
  • [ ] Focused on one distinct idea; avoid vagueness
  • [ ] Central Idea written as one grammatically correct sentence signaling main points
  • [ ] Central Idea previews three main points with parallel structure when possible
  • [ ] Topic aligns with assignment requirements and time limits
  • [ ] Language is concrete, not overly flowery or abstract
  • [ ] Materials support the central idea with appropriate evidence (examples, statistics, anecdotes, testimonies)

• Note on structure going forward

  • The general purpose, specific purpose, and central idea should be clear at the outset of the outline
  • The introduction should ultimately relate back to these elements while engaging the audience
  • Use the three main points to develop a balanced, engaging argument or explanation
  • Revisit and revise as needed during research to maintain focus and relevance