Education

Why Explaining Out Loud Beats Silent Review When You Study

Rive News Research Desk

Published November 03, 2026 · 6 min read

Key takeaways

Saying words aloud makes them more memorable than silent reading, a finding researchers call the production effect.
Explaining forces you to organize ideas, which reveals gaps that silent rereading hides.
Reading aloud improves memory of words, but newer research says it does not automatically improve comprehension.

A student reading a textbook, studying for an exam — A student reads from a textbook. Saying ideas aloud strengthens memory more than silent reviewPhotograph: Knowledge and philosophy

Image Credits: Wikimedia Commons / Knowledge and philosophy

Two different things are happening when you talk

"Explaining out loud beats silent review" sounds like folk wisdom, but cognitive scientists have spent decades testing it. The research separates the idea into two mechanisms: producing the words physically, and organizing the explanation mentally. Both help, but they help in different ways.

This article covers both, including the production effect discovered at the University of Waterloo, what later studies revealed about comprehension, and how to use speaking as a study tool without wasting your time.

The production effect: saying it makes it stick

In 2010, Colin MacLeod and colleagues at the University of Waterloo named a phenomenon they had observed across eleven separate experiments: words read aloud are remembered substantially better than words read silently. They called it the production effect.

The proposed mechanism is distinctiveness. A silently read word leaves a plain memory trace. A word you say aloud leaves that same trace plus extra information: the sound of your voice, the muscle movements of speech, and the knowledge that you personally produced it.

That extra information gives your brain more hooks to grab during recall. The 2010 paper appeared in the Journal of Experimental Psychology: Learning, Memory, and Cognition, as summarized in the team's later review.

Follow-up work mapped the boundaries. MacLeod's 2011 study, published in Psychonomic Bulletin and Review, tested whether production had to be self-performed.

Two experiments showed the effect was reliable when someone else said the word, but substantially smaller than when the learner said it themselves. Distinctiveness, the researchers concluded, is greatest to the extent that production is personal.

The 2017 review by MacLeod and Glen Bodner in Current Directions in Psychological Science (volume 26, pages 390 to 395) confirmed the core finding across many labs: producing items by saying, writing, or typing them yields substantial memory improvements over silent reading, even with incidental learning where participants did not know a test was coming.

Where speaking stops helping

Here is the honest caveat that thinner study tips skip. The production effect boosts memory of words and passages. Newer research led by Brady Roberts tested whether reading aloud also improves comprehension, and the answer appears to be no.

Roberts' team had students read ten passages, half aloud and half silently, then answer multiple-choice questions. Half the questions tested simple recall of words from the passage; the rest tested comprehension.

The team ran the study four times with increasing sample sizes and different passages. Reading aloud improved memory of the passages, but it did not improve comprehension scores, according to the Learning and the Brain write-up of this research.

The distinction matters for how you study. If the exam tests vocabulary, definitions, and formulas, reading them aloud is genuinely effective. If the exam tests deep understanding, speaking alone will not get you there.

Why explaining goes further than reading aloud

Reading a definition aloud is production. Explaining the definition in your own words is something bigger: self-explanation.

Explaining forces you to organize the material, connect new ideas to things you already know, and choose your words deliberately. That organizational work is what builds understanding.

Explaining also exposes gaps. When you try to say why something works and the sentence collapses, you have found exactly what you do not understand.

Silent rereading never gives you that signal, because recognizing familiar words feels like knowing them. Researchers call that the illusion of competence, and it is why rereading is one of the weakest study strategies.

Teaching is the strongest version of this. The Feynman technique, the classic advice to explain a concept as if teaching it to a beginner, works because a student asking "but why?" forces the explanation to be complete.

Even explaining to an imaginary listener or a rubber duck on your desk creates the same pressure to be coherent.

A student reading a book in a quiet library — Studying in a library. Even whispering an explanation aloud creates a stronger memory tracePhotograph: Vladimir Grigoryev

Image Credits: Wikimedia Commons / Vladimir Grigoryev

How to use speaking in your study routine

Use the two mechanisms for what they are good at. Read key terms, formulas, and dates aloud during memorization passes. The production effect is strongest for distinct, individual items, so this is where it pays off most.

Then switch from reading to explaining. Close the book and state the concept in your own words, out loud, as if teaching someone.

When you stall, open the book, find the missing piece, close it again, and start over. That loop of retrieval plus explanation is far more powerful than either alone.

One caution from the research: the production effect works best when it is distinctive. If you read an entire chapter aloud at full volume, everything becomes "produced" and nothing stands out. Save your voice for the items that matter most.

Pair speaking with spaced practice. Active recall gives you the retrieval, spaced repetition schedules it, and speaking strengthens the encoding each time. And check whether the Pomodoro technique fits your rhythm, since focused intervals keep long vocal study sessions sustainable.

Students studying together in a university library — Students studying together. Explaining ideas to a study partner combines production with social accountabilityPhotograph: Gary Todd

Image Credits: Wikimedia Commons / Gary Todd

What is the production effect in studying?

The production effect is the finding that words read aloud are remembered better than words read silently. Named by Colin MacLeod's team in 2010 after eleven experiments at the University of Waterloo, it works because producing the word adds distinctive information to the memory trace.

Does explaining out loud improve understanding or just memory?

Reading aloud reliably improves memory, but research by Brady Roberts found it does not improve comprehension. Explaining in your own words goes further, because organizing an explanation forces you to connect ideas and reveals what you do not actually understand.

Is the Feynman technique backed by research?

The Feynman technique is advice, not a named study: explain a concept as if teaching a beginner. Its power comes from combining the production effect with self-explanation, which forces organization of the material. The components are well supported, even if the packaged technique itself is not a lab finding.

Should I read everything aloud when studying?

No. The production effect works through distinctiveness, so reading an entire chapter aloud makes nothing stand out. Read key terms and formulas aloud, then close the book and explain the concepts in your own words.

The bottom line

Explaining out loud beats silent review because two things are working at once. Production creates more distinctive memory traces than silent reading, and self-explanation forces the organization that rereading hides. Use your voice for the facts you must memorize and your own words for the ideas you must understand, and the exam becomes a retrieval exercise instead of a relearning one.

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