Remembering information after reading it can be surprisingly difficult. You may finish an article, study a chapter or review a list, only to realize later that some details have already faded. Psychology research suggests that one small change in how you read may help: saying the information aloud.
The idea is known as the “production effect”. It describes a memory advantage that can occur when people actively produce information, rather than simply reading it silently. Speaking the words adds an action and an auditory experience to the visual information, potentially giving the brain additional cues for remembering it later.
Speaking
Researchers at the University of Waterloo examined how different ways of encountering written information affected memory. The study compared four conditions: reading silently, hearing another person read, listening to a recording of oneself reading and reading aloud in real time.
Among 95 participants, reading the material aloud to themselves produced the strongest memory performance.
The researchers proposed that speaking makes information more distinctive. Instead of only seeing a word, the reader also produces it and hears their own voice. These additional experiences can create more features that may later help with retrieval.
Colin M. MacLeod, a professor and chair of the Department of Psychology at Waterloo, described the finding as evidence that active involvement can benefit learning and memory. Adding a production element to information can make it more distinctive in long-term memory.
This does not necessarily mean reading aloud improves understanding. Its clearest potential advantage appears to involve remembering information after it has been encountered.
Production
The production effect is not limited to isolated words. Researchers have also examined whether the same principle applies to longer pieces of information.
A 2023 study published in Memory & Cognition investigated whether reading passages aloud could influence later performance. Brady R. T. Roberts, Zoey S. Hu, Eloise Curtis, Glen E. Bodner, David McLean and Colin M. MacLeod conducted four experiments in which participants read passages either aloud or silently before answering multiple-choice questions.
The researchers found an advantage for reading aloud when the questions tested memory. However, the same advantage did not consistently appear when questions focused primarily on comprehension.
That distinction matters. Reading aloud may help make information easier to retrieve without necessarily making the underlying material easier to understand.
In practical terms, speaking a key fact aloud could give it another memory cue. The reader has seen the words, produced the sounds and heard them. When the information needs to be recalled later, those additional features may provide another route back to the original memory.
Attention
There may be another explanation for the effect. Reading aloud requires active participation, which can make it harder for attention to drift.
Research by Trish L. Varao Sousa, Jonathan S. A. Carriere and Daniel Smilek compared reading aloud, listening to passages and reading silently. The participants who read aloud showed the lowest levels of mind wandering.
Listening, by comparison, was associated with more mind wandering, along with poorer memory and lower interest in the material.
This does not mean silent reading causes poor concentration. Silent reading remains the most practical approach for many situations and can support strong comprehension. The findings instead suggest that producing information may increase engagement during certain reading tasks.
Memory
A 2023 meta-analysis by Jonathan M. Fawcett and colleagues provides further context. The researchers found evidence that producing information can improve recognition memory, although the effects on recall were more complex.
One proposed explanation is distinctiveness. Information that stands out from surrounding material can be easier to recognize later. Speaking may create that distinction because the experience is different from ordinary silent reading.
This may help explain why saying a phone number aloud, repeating a definition or verbally reviewing an important fact can sometimes make it easier to remember.
The effect is not a guarantee, however. Memory depends on many factors, including attention, prior knowledge, repetition, sleep and the complexity of the material.
Practice
The research has a straightforward practical implication. When a particular detail needs to be remembered, reading it aloud could be worth trying.
For example, students might read a definition aloud before testing themselves on it. Someone preparing a presentation could say key points rather than repeatedly scanning the same notes. A person learning a new language might pronounce unfamiliar words instead of only looking at their spelling.
It is also useful to distinguish active recall from simply repeating information. Reading something aloud can add a production cue, but testing yourself afterward can provide another opportunity to retrieve the information.
Silent reading is not a weaker form of learning in every situation. For comprehension, speed and longer reading sessions, it remains highly useful. The evidence simply suggests that adding an active element can sometimes change how information is encoded and remembered.
Overall, psychology research on the production effect suggests that reading aloud may give certain information an additional memory advantage. Speaking adds movement, sound and active participation to the experience of reading, potentially making details more distinctive when the brain later tries to retrieve them. For information that really matters, saying it aloud may be a simple way to give memory another cue to work with.
FAQs
Does reading aloud improve memory?
Research suggests reading aloud can improve memory for some information.
What is the production effect?
It is the memory benefit linked to actively producing information.
Can reading aloud improve comprehension?
The benefit is clearer for memory than for comprehension.
Does reading aloud reduce mind wandering?
Research suggests it may help reduce mind wandering during reading.
Should students read everything aloud?
Not necessarily; reading aloud is most useful for selected information.
