You know those people who always boast about having a perfect memory?
Maybe they shouldn’t, because having total recall is totally overrated.
That’s according to a new paper in the journal Neuron, which concludes that forgetting things is not just normal, it actually makes us smarter.
In the new report, researchers Paul Frankland and Blake Richards of the University of Toronto propose that the goal of memory is not to transmit the most accurate information over time.
Rather, they say, it’s to optimize intelligent decision-making by holding onto what’s important and letting go of what’s not.
“It’s important that the brain forgets irrelevant details and instead focuses on the stuff that’s going to help make decisions in the real world,” says Richards, an associate fellow in the Learning in Machines and Brains program.
The researchers came to this conclusion after looking at years of data on memory, memory loss, and brain activity in both humans and animals.
One of Frankland’s own studies in mice, for example, found that as new brain cells are formed in the hippocampus — a region of the brain associated with learning new things — those new connections overwrite old memories and make them harder to access.
This constant swapping of old memories for new ones can have real evolutionary benefits, they say. For example, it can allow us to adapt to new situations by letting go of outdated and potentially misleading information.
“If you’re trying to navigate the world and your brain is constantly bringing up conflicting memories, that makes it harder for you to make an informed decision,” says Richards.
Our brains also help us forget specifics about past events while still remembering the big picture, which the researchers think gives us the ability to generalize previous experiences and better apply them to current situations.
“We all admire the person who can smash Trivial Pursuit or win at Jeopardy, but the fact is that evolution shaped our memory not to win a trivia game, but to make intelligent decisions,” says Richards. “And when you look at what’s needed to make intelligent decisions, we would argue that it’s healthy to forget some things.” Continue reading
- Image: Memes
