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Understand How Cognitive Load and Working Memory Limit the Brain and Discover More Effective Study Techniques According to Neuroscience.
Studying for many hours in a row does not always mean learning more. This is the conclusion put forward by physiology professor Noelia Valle from Francisco de Vitoria University in Spain, who analyzed how the brain processes information.
According to the specialist, concepts from learning neuroscience, such as working memory and cognitive load, show that an excess of information can hinder the learning process. The explanation was presented in interviews and analyses published on academic platforms and BBC News Mundo.
According to the researcher, the problem occurs because the human brain has clear limits for processing new information. When students try to absorb too much content at once, working memory becomes overloaded, reducing the ability to comprehend and retain.
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Therefore, smart strategies and appropriate study techniques are considered more efficient than simply increasing the number of hours dedicated to books.
Cognitive Load: The Invisible Limit That Affects Learning
The so-called cognitive load represents the mental effort required to process new information. This concept is central to learning neuroscience, as it defines how far the brain can work with data at the same time.
According to Noelia Valle, the brain functions like a temporary processing space.
“It is the processor or the RAM of our brain, that is, the ability to retain and manipulate information for a brief period of time.”
This capacity is known as working memory and acts as a mental space where ideas are manipulated while we think, solve problems, or learn something new.
The specialist uses a simple metaphor to explain.
“It’s like a cutting board, the physical space where you place all the ingredients you need to chop and mix.”
When too much information is put in at once, the brain simply cannot process it.
“If you put too many ingredients, they will fall off the cutting board. And working memory cannot ‘cook’ more than what fits on that board.”
Working Memory: The Brain Can Only Handle 5 to 9 Items
Research in learning neuroscience indicates that working memory has a very limited capacity. On average, the brain can handle between five and nine units of information at the same time.
These units are called chunks, a term used in cognitive psychology to describe fragments of information.
This means that novice students tend to face more difficulties when learning new content.
“For a first-year medical student, ‘high heart rate,’ ‘low blood pressure,’ and ‘cold skin’ are three different pieces of data,” Valle explains.
Experts can organize this data more efficiently.
“For a specialist doctor, these three pieces of data are automatically grouped into a single concept: ‘hypovolemic shock.’”
This process shows that experts do not have a larger memory, but rather more organized memory.
“The memory of specialists is not larger; it is more organized.”
Thus, the goal of learning is to transform several isolated data points into broader concepts.
More Effective Study Techniques According to Learning Neuroscience
Contrary to what many students believe, spending hours on end studying can increase cognitive load and reduce learning efficiency.
According to Valle, a more balanced routine tends to yield better results.
Studies indicate that studying about two hours a day over several weeks tends to be more efficient than studying many hours in a single day.
In addition, breaks are essential.
“Taking brief breaks every half hour allows, on one hand, for information to move from working memory to a state of consolidation.”
Another important factor is that the brain learns better when it needs to retrieve information, not just repeat it.
“The brain does not learn while receiving information, but rather when it strives to retrieve it.”
Therefore, some study techniques are recommended:
Transform texts into outlines or mind maps;
Take self-assessment tests;
Explain the content to someone else;
Rewrite answers correcting the reasoning.
These activities stimulate active manipulation of information, favoring effective learning.
Sleep, Environment, and Focus Also Influence Effective Learning
Thus, learning neuroscience also shows that external factors directly influence the ability to learn.
Sleep, for example, is essential for consolidating memories.
Furthermore, the study environment can increase or decrease cognitive load.
So noisy spaces or those with many distractions force the brain to spend energy trying to ignore irrelevant stimuli.
“If you study in a messy space, with noise, or have your phone notifications turned on, your brain will use part of working memory to inhibit these stimuli.”
Another important point is studying during times of higher mental energy.
“Trying to memorize something complex when the body is at its lowest energy level increases the cognitive load required.”
How to Overcome Initial Difficulty in Learning
When a content seems too complex, it does not indicate intellectual incapacity. According to the specialist, it is merely a high cognitive load, common in initial stages of learning.
Valle recommends starting by dividing the content into smaller parts.
“Make them so small that they seem ridiculous, as easy to learn.”
Small achievements help maintain motivation and facilitate the formation of new knowledge.
Another strategy is to relate the content to everyday situations.
“If you are studying inflation, compare today’s coffee price with that of a year ago.”
This connection creates memory anchors that facilitate the retrieval of information.
Effective Learning Depends on Strategy, Not Excessive Effort
For the professor, the key to learning better lies not in studying more, but in studying smarter.
The brain becomes more efficient as it automates tasks and organizes information better.
“Just as an experienced athlete consumes less energy to perform an action, the brain, as it becomes more skilled at a task, requires fewer neuronal resources.”
Therefore, understanding how working memory, cognitive load, and study techniques work can transform the way students learn.
“It is about understanding and respecting the cognitive architecture we all operate with to minimize useless efforts and maximize deep learning.”
So according to the specialist, true effective learning happens when the brain is stimulated in the right way — and not when it is pushed beyond its limits.
See more at: The Cognitive Load Trap: Why Studying Longer Doesn’t Always Help You Learn More — BBC News Brazil
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