A 29-Word Test That Predicts College Success
What if you could predict a student's academic success over four years of college — using a test that takes less than ten minutes?
At the University of Illinois, Professor William D. Templeman did exactly that.
The Study
Templeman administered a simple 29-word vocabulary test to incoming freshmen at the University of Illinois. The test wasn't designed to measure subject knowledge, study habits, or motivation. It measured one thing: how many words each student knew.
Then he tracked those students through their entire college career.
The finding was remarkable: vocabulary scores from that single 29-word test accurately predicted academic performance across all four years and across all subjects.
Students who scored high on the vocabulary test consistently earned better grades — not just in English or humanities, but in science, mathematics, and every other discipline.
As Templeman put it: if a student has a superior vocabulary, it will probably follow that they will do better work academically.
What Makes This Finding So Powerful
Several things stand out about this research:
It was subject-agnostic. Vocabulary didn't just predict English grades. It predicted performance in every field. This suggests vocabulary isn't merely a language skill — it's a thinking skill.
It predicted across four years. This wasn't a one-semester correlation. The predictive power of vocabulary held up year after year, suggesting it captures something fundamental about a student's capacity to learn.
Previous academic achievement didn't matter as much. Regardless of a student's high school record, their vocabulary score was a strong predictor of college success. A student with a mediocre high school GPA but strong vocabulary could outperform a student with excellent grades but weaker word knowledge.
Why Vocabulary Predicts Everything
Vocabulary is sometimes dismissed as a surface-level skill — as if knowing words is just about being well-read. But Templeman's research suggests something deeper is at work.
Vocabulary is the medium of thought. Every subject, at the college level, is taught through language. Textbooks, lectures, assignments, exams — they all require understanding complex language. A student with a limited vocabulary hits a comprehension ceiling in every course.
Vocabulary reflects general knowledge. A large vocabulary doesn't develop in a vacuum. Students who know many words have typically engaged with a wide range of ideas, texts, and experiences. Their vocabulary is a proxy for the breadth of their intellectual world.
Vocabulary enables independent learning. College requires students to learn on their own — reading textbooks, parsing research papers, following complex arguments. A strong vocabulary makes all of this possible without constant support.
The Implication for Schools Today
Templeman's research has a clear message for schools: vocabulary is not a minor part of education. It may be the most important foundation you can build.
Consider this: if a 29-word test given to 18-year-olds can predict their academic trajectory for the next four years, then the vocabulary a student builds during their school years (ages 6-18) has an enormous impact on their future.
Yet most schools devote remarkably little structured time to vocabulary building. When they do, it's often through rote memorization — the exact approach that research shows doesn't create lasting retention.
Students need a vocabulary-building system that works with how the brain actually learns: through meaningful associations, visual cues, and spaced review over time.
VocabularyFast is built on exactly these principles. Using keyword mnemonics and spaced repetition, it helps students build the kind of deep, lasting vocabulary that Templeman's research shows is so predictive of success.
References:
- Templeman, W. D. — Freshman vocabulary testing research, University of Illinois.
- As cited in Lewis, N. (1949/2014). Word Power Made Easy. Penguin.
- VocabularyZone — "Vocabulary, The Little Known Secret to Academic Success" (2024).
