By Sera Denizkusu, Year 11
One would typically think that what you see and remember is accurate. But In reality, your brain constantly edits, filters, and reshapes information. Not because it is faulty, but because over time the human brain has prioritised survival over accuracy.
Vision is a good example of this phenomenon. Your eyes only detect light, and your brain then decides what that light means. When information is incomplete, it fills in the gaps using past experience. This is why optical illusions work and why people often miss obvious changes in their surroundings. Your brain automatically ignores details that may seem irrelevant and keeps information that assures stability.
Memory is even less reliable. Rather than storing events like a recording, our brains tamper with memories and modify them each time they are recalled. In fact, When emotion is involved this becomes even more impactful; many small details are altered, and sometimes even lost. Experiments show that simply changing the wording of a question can change what people believe they remember. Over time, memories become interpretations rather than facts.
These inaccuracies are not mistakes. They are protective mechanisms. Fear responses, controlled by the amygdala (a small part of the brain that helps control emotions, mostly fear), activate faster than conscious thought. This allows humans to react quickly to danger, but it also means the brain can exaggerate threats that are not physically harmful, such as exams or social situations.
The modern world makes this worse. Over time, human brains have developed to encourage survival in certain scenarios, not constant simulation and information. Current devices and technologies challenge attention spans and overexploit our bodies that are still adapting to these quick changes.
Your brain is not designed to show you reality as it is. It shows you a version that is efficient, familiar, and usually good enough to keep you safe. Understanding this does not stop the distortions, but it does help explain why perception, memory, and emotion are often less reliable than we assume.
