Canadian researchers say you can improve memory with this one weird trick: if you want to remember something, read it out loud.
It’s called the “production effect”, a term coined by the Canadian researcher who discovered it, Colin MacLeod, a psychology professor at the University of Waterloo.
Typing something out or writing it down also results in variations of the production effect on memory. Even mouthing something without producing sound seems to trigger the effect. But what appears to work best is speaking it aloud.
MacLeod says, “I think that leads to better initial encoding of the information in memory. But it’s particularly useful at the time of test when you try to retrieve stuff from memory.”
MacLeod first identified the production effect in 2010, and has tested it in a series of followup studies. The most recent variation was published in the journal Memory.
His team tested four ways of remembering by asking students to read a list of words silently, read them out loud, listen to someone else read them and listen to a recording of their own voice repeating the words. Then the students were asked to look at a long list of words and remember which ones they’d already seen. Their recall varied across the four techniques.
MacLeod does not recommend reading an entire textbook out loud.
He says, “But selecting the important stuff, that’s good.”
MacLeod’s research was focused on storing information in long-term memory.
Other research has shown that saying something out loud can also improve short-term recall, to reassure yourself that you did something that you fear you might have forgotten, such as saying, “I locked the door” or “I turned off the stove.”
The researchers aren’t certain exactly why vocalization improves memory. MacLeod says his next research question is to understand the physiological mechanism behind the production effect.