Great Ideas from the Brain Sciences: How Retention Helps Us Learn

Great Ideas from the Brain Sciences: How Retention Helps Us Learn

By: Mirela C. C. Ramacciotti

Learning means remembering information, right? But how confident can teachers be that the information necessary for understanding and moving ahead in learning, especially a language, remains? Thanks to Ebbinghaus, in a work originally published in 1885, teachers may have a rough estimate of how much information has been retained.

A photo of Hermann Ebbinghaus.

Retained here is an important word because the Ebbinghaus Curve (see reproduction below) is often referred to as the “Forgetting Curve” while, in reality, it should be known as the “Retention Curve.” Ebbinghaus plotted it with results obtained in an experiment with the amount of information retained from a verbal learning paradigm that used non-meaningful syllables. What you see in the curve below—confirmed by many experiments over the years—shows how fast retention drops immediately after learning while the rate of forgetting slows as time goes by.

This piece of knowledge alone merits double care in the classroom. It implies that forgetting seems like natural brain behavior, that is, teachers should not fight against forgetting per se but rather invest in techniques that lead to desired learning outcomes. A way to do this is to devote class time to  spaced learning and retrieval practices. However, there is more to how information is retained, and that has to do with levels of processing.

The notion that there are different ways to process information affecting directly how it is encoded, or memorized, came from Fergus I. M. Craik and Robert S. Lockhart in 1972. They proposed a framework that appreciated the dynamics of human memory. Their work developed the idea of levels of processing—shallow and deep—to explain how processes of encoding and retrieval were dynamically set in our minds and brains. 

An illustration of two people diving, one with plenty of room to swim and the other quickly hitting the bottom of a shallow pool.

In doing so, they opened ways for understanding—and for more research to be developed—via tasks that allowed for a decoupling method of information encoding. In other words, they made clear that there is a difference between familiarity (what you seem to know) and recollection (what you actually remember), and that has to do with how information is processed: via concept (as in semantic or associative tasks) or via perception (as in structural or phonological tasks).

Recent studies have shown that deep processing (the meaning pathway) is indeed superior to shallow processing (the form pathway) in terms of retention, because information that is elaborated through a series of rehearsals tends to be retained for longer. This is especially relevant here as experiments were performed using words. Further, when information gets encoded via semantic pathways (deep level), it tends to stick more tightly in our memories across time.

Think about how many times students in a language class have to rehearse the same word in different contexts; they will struggle to make sense of that new word many times over. It is this series of rehearsals in trying to elaborate ways to use that new piece of information (the new word) in meaningful ways that makes it stick.

Now when it comes to our natural propensity, that is, forgetting, deep or shallow levels of processing have the same result in terms of forgetting. Both pathways lead to some forgetting. That goes to show that forgetting seems to be as human as remembering; so, giving students many meaningful practice opportunities with the target language is key to helping them retain that information. Final words: don’t fight a losing battle 😊

References

Mirela C. C. Ramacciotti is presently engaged as an external lecturer on the topic of Mind, Brain, and Education at the Graduate Level Course with the Psychology Department at the University of São Paulo. She holds a PhD in Neuroscience and Behavior and another in Human Communication Disorders.

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