Why Referring Pronouns Matter on the GMAT
One of the most frequently tested concepts in GMAT Sentence Correction is the correct use of referring pronouns like who, whom, which, and that. These words connect ideas, clarify relationships, and prevent ambiguity. Misusing them often leads to awkward, unclear, or grammatically incorrect sentences—exactly the kind of errors the GMAT wants you to spot under time pressure.
To perform well, you must do more than memorize rules. You need to quickly see what each pronoun is referring to and confirm that the reference is logical, precise, and grammatically consistent. Among these rules, the difference between who and what creates some of the trickiest questions for test‑takers.
Who vs. What: The Core GMAT Rule
The GMAT expects you to know that who refers to people, while what typically refers to things, ideas, or unknown objects, not to clearly identified people. This seems simple in theory, but test writers create subtle traps by embedding pronouns inside longer phrases.
Who Refers to People
Use who only when the antecedent is a person or a group of people treated as individuals.
Correct: The researcher who conducted the study presented the findings.
Explanation: Who clearly refers to "the researcher," a person.
Correct: The committee members who opposed the proposal requested a second vote.
Explanation: Who refers to "committee members," again, people.
What Refers to Things or Unknown Objects
Use what when the thing being referred to is not explicitly named yet or is an abstract idea, object, or situation rather than a specific person already mentioned.
Correct: She finally achieved what she had been working toward for years.
Explanation: What refers to an abstract outcome or goal, not a person.
Correct: The experiment produced what scientists had predicted.
Explanation: The result is a thing or outcome, not a person.
A Common GMAT Trap: Using "What" to Refer to People
On the GMAT, incorrect answer choices often use what to refer back to a specific person or group of people. This is grammatically and logically flawed because what is not used as a relative pronoun for a clearly identified person.
Flawed Example
Incorrect: The manager admired the employees and what they had become after the training program.
Why it is wrong: The intended reference is to the employees themselves in their new form (still people), but what is used. This shifts the focus awkwardly toward a thing rather than people.
Better: The manager admired the employees and who they had become after the training program.
Explanation: Who correctly refers to people—the employees in their transformed roles.
Recognizing the Underlying Meaning
To choose between who and what on the GMAT, ask yourself:
- Is the antecedent clearly a person or group of people? If yes, prefer who.
- Is the sentence describing an abstract state, concept, or result? Then what may be correct.
- Is the reference ambiguous? If the pronoun could logically refer to multiple nouns, the sentence is likely wrong, even if the pronoun is otherwise grammatical.
Step-by-Step Method: How to Test Referring Pronouns on GMAT SC
When you see who, whom, which, that, or what in a Sentence Correction question, follow a consistent approach:
- Locate the pronoun. Identify who, which, that, or what in the sentence.
- Find the antecedent. Ask: "Exactly which word or phrase is this pronoun referring to?" There must be a single, clear noun.
- Check people vs. things. If the antecedent is a person, you normally need who, not what or which.
- Test for ambiguity. If the pronoun could refer to more than one noun, the sentence is usually incorrect.
- Check agreement and logic. Make sure the meaning makes sense and the sentence reads smoothly.
More Referring Pronoun Pitfalls on the GMAT
Which vs. That
In addition to who vs. what, many GMAT questions test which vs. that. These pronouns refer to things, not people, and differ in how they integrate into the sentence structure.
- That usually introduces an essential (restrictive) clause—information necessary to identify the noun.
- Which generally introduces a nonessential (nonrestrictive) clause—extra information set off by commas.
Correct: The proposal that was submitted yesterday outlines a new strategy.
Explanation: The clause identifies which proposal is meant; it is essential.
Correct: The proposal, which was submitted yesterday, outlines a new strategy.
Explanation: Here, "submitted yesterday" is extra information about a specific proposal already identified.
Ambiguous "They" and "It"
While the focus here is who vs. what, be aware that ambiguous pronouns like they, them, and it are also common traps.
Ambiguous: The company acquired the supplier from Europe, and they plan to expand operations.
Issue: Does they refer to the company or the supplier? The sentence is unclear.
Clear: The company acquired the supplier from Europe, and the supplier plans to expand operations.
Explanation: The repetition of "supplier" removes ambiguity, which the GMAT favors.
GMAT-Style Practice Questions
Question 1
Original Sentence:
The scholarship program transformed many of its recipients, inspiring them to pursue careers that reflected what they had become.
Analysis: The phrase "what they had become" refers to the recipients themselves, now in a changed state—still people. However, what is used, which is not appropriate for people.
Improved Version:
The scholarship program transformed many of its recipients, inspiring them to pursue careers that reflected who they had become.
Question 2
Original Sentence:
After years of training, the athletes finally achieved what they had long dreamed of.
Analysis: Here, what refers to an abstract goal or achievement, not to the athletes themselves, so what is acceptable.
Result: The sentence is correct as written, and a choice incorrectly replacing what with who would be wrong.
Strategic Tips for Sentence Correction Timing
Referring pronoun questions can be solved quickly if you train your eye to notice them immediately. Keep the following strategies in mind:
- Scan for pronouns first. As you read the sentence, mentally highlight words like who, whom, which, that, what, they, and it.
- Identify the antecedent instantly. Ask: "What, exactly, does this pronoun stand for?" If you hesitate or see more than one option, the answer choice is suspect.
- Eliminate extreme wordiness. Incorrect answers often add unnecessary phrases that obscure the pronoun's reference. The GMAT typically prefers clarity and economy.
- Trust clear, logical meaning. If a version makes the human/nonhuman distinction obvious and reads smoothly, it is often the correct choice.
Building Long-Term Mastery with Targeted Practice
To become reliable on these problems, you need to see many variations of the same idea under timed conditions. As you review, build a personal error log focused on referring pronouns: record each mistake that involves who, what, which, that, or ambiguous they. Then, categorize them by error type—people vs. things, ambiguity, or misplaced clauses.
Over time, patterns will emerge. Maybe you consistently miss situations where a pronoun has more than one possible antecedent, or perhaps you default to what in sentences where the reference is actually to people. Use these insights to guide focused drills around your weak points rather than spread your efforts too evenly across all grammar topics.
Key Takeaways for GMAT Referring Pronouns
- Who refers to people; what refers to things, ideas, or outcomes.
- Using what to refer to a specific person or group of people is almost always incorrect on the GMAT.
- Always identify the precise antecedent and check for ambiguity.
- Prefer clear, concise sentences in which pronouns obviously match their nouns in both logic and grammar.
With sustained practice, the who/what distinction and other pronoun rules will become intuitive, giving you faster, more confident progress on Sentence Correction questions.