Determining the Primary Purpose
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When we read a text, we instinctively ask, "What is this about?" But to truly understand a piece of writing—to analyze it with the rigor required of an educator—we must ask a deeper, structural question: "Why does this exist?" Every passage is constructed with an intentional design. Think of a text's informational content as the raw materials of a building, and the author as the architect. The raw materials tell you what the building is made of, but they do not tell you if the structure is meant to be a hospital, a theater, or a fortress. Understanding the author's overarching objective is the key to unlocking the text's design, guiding how we interpret the evidence, evaluate the claims, and ultimately determine meaning.
As a future educator, you will constantly help students distinguish between the "what" and the "why" of a text. On the Praxis Core Reading exam, you must make this distinction flawlessly yourself.
The main idea represents the central topic or informational message of a text. It is the what. The primary purpose is the author's central reason for creating the text. It represents the author's underlying objective in sharing the main idea with the reader. It is the why.
Imagine reading an article about the funding disparities between urban and suburban school districts. The main idea might be that urban schools receive significantly less funding per student. But the primary purpose could be to expose an injustice, to demand a policy change, or simply to report the latest financial data.
At the most fundamental level, an author's primary purpose generally falls into one of three broad categories: to inform, to persuade, and to entertain.
- To Inform: Texts written to inform present facts and objective information without personal bias. The author acts as a neutral guide, illuminating a subject so the reader can understand it clearly.
- To Persuade: Texts written to persuade attempt to convince the reader to adopt a specific viewpoint. Often, these persuasive texts urge the reader to take a specific action regarding a societal issue, such as voting for a bond measure or reforming a curriculum.
- To Entertain: Texts written to entertain focus on engaging the reader's imagination or emotions through narrative elements.
While these categories seem simple, the Praxis exam tests your ability to identify highly specific variations of these three broad goals within complex academic and non-fiction passages.
When you encounter a primary purpose question on the Praxis, you will notice a distinct grammatical pattern in the answer choices. Praxis Core Reading questions about primary purpose typically use infinitive phrases—structures that begin with the word "to" followed by a verb.
You will see choices like "to analyze the causes of..." or "to argue that..."
The verb chosen for the infinitive phrase is your biggest clue to the author's intent, as specific verbs map cleanly to our three broad categories of purpose.
| Purpose Category | Common Praxis Infinitive Verbs |
|---|---|
| Informative | to explain, to describe, to illustrate, to outline |
| Persuasive | to argue, to defend, to advocate, to urge, to challenge |
| Analytical/Evaluative | to analyze, to evaluate, to compare, to trace |
Structural Clues to the Infinitive Verb
Sometimes, the physical structure of the text dictates the verb.
- If a passage spends three paragraphs tracing the chronological development of an event (like the history of standardized testing), this structure typically indicates a primary purpose to provide a historical overview.
- If a passage is constantly comparing two contrasting ideas, this structural tension often indicates a primary purpose to evaluate differing viewpoints.
How do you differentiate between a text that outlines a policy (informing) and a text that champions that policy (persuading)? You listen to the music of the text—the author's tone. An author's tone provides critical clues for determining the primary purpose of a passage.
- Neutral and Objective Tones: A neutral tone typically indicates a primary purpose to inform or explain. An objective tone—where the author removes their ego and focuses strictly on verifiable reality—also typically indicates a primary purpose to inform or explain.
- Passionate and Critical Tones: A passionate tone usually indicates a primary purpose to persuade or argue. Similarly, a critical tone usually indicates a primary purpose to persuade or argue. If the author is expressing outrage, skepticism, or deep admiration, they are not just handing you facts; they are trying to move your mind to a specific vantage point.
To find the author's tone and overarching goal, look at the end of the first paragraph or the opening of the final paragraph. The thesis statement of a passage often contains direct phrasing about the author's overarching goal. When an author writes, "It is imperative that we reconsider how we assess student growth," they are handing you their persuasive primary purpose on a silver platter.
Now we arrive at the most dangerous trap on the Praxis Core Reading exam. This is where brilliant test-takers stumble.
Authors often employ secondary purposes within a text to support their primary objective. A masterfully written text rarely uses just one tool.
For example, an author might use an entertaining anecdote as a secondary technique to support a primary goal of persuasion. Imagine a writer opening an essay with a hilarious, vivid story about a chaotic kindergarten classroom. The story is entertaining, yes. It engages the imagination and emotions through narrative elements. But if the rest of the essay argues for smaller class sizes, the primary purpose is not to entertain. The entertainment was merely a vehicle to get you to care about the argument.
Similarly, persuasive passages frequently incorporate objective facts to build credibility for a subjective argument. An author arguing that a specific educational philosophy is failing might quote heavy statistical data. Do not let the data fool you. The inclusion of factual data does not guarantee that a passage's primary purpose is strictly informative. Facts are often weaponized to persuade.
The "Whole Passage" Rule
Because authors weave facts into arguments, and anecdotes into facts, identifying the primary purpose requires separating the overarching goal of the entire passage from the goals of individual paragraphs.
Correct answers for primary purpose questions must reflect the author's intention for the passage as a whole.
When you look at the multiple-choice options, the test writers will include traps. They will offer an answer choice that flawlessly describes exactly what paragraph three is doing. But answer choices summarizing only a single paragraph describe a supporting detail rather than the overarching primary purpose.
Think of it like diagnosing a student's reading struggle. You wouldn't define a student's entire academic profile based on one missed vocabulary word on a Tuesday. You look at the holistic picture. When asked for the primary purpose, zoom out. Ask yourself: If I stripped away the anecdotes, the data points, and the historical tangents, what is the single, driving reason this author sat down at their keyboard?
Find that driving reason, match it to the correct infinitive phrase, confirm it with the author's tone, and you will master the primary purpose questions on your Praxis exam.