{"id":103136,"date":"2023-05-30T11:47:00","date_gmt":"2023-05-30T15:47:00","guid":{"rendered":"https:\/\/www.shortform.com\/blog\/?p=103136"},"modified":"2023-06-01T09:48:00","modified_gmt":"2023-06-01T13:48:00","slug":"reality-is-constructed-by-your-brain","status":"publish","type":"post","link":"https:\/\/www.shortform.com\/blog\/reality-is-constructed-by-your-brain\/","title":{"rendered":"Reality Is Constructed by Your Brain\u2014How Predictions Work"},"content":{"rendered":"\n

Why does your brain rely on predictions? How does your brain create reality?<\/p>\n\n\n\n

Even when you don’t realize it, your brain is taking in everything around you. According to The Expectation Effect<\/em> by David Robson, this helps create predictions that may or may not come true in the future.<\/p>\n\n\n\n

Continue reading to learn how reality is constructed by your brain constantly.<\/p>\n\n\n\n\n\n\n\n

How Does Your Brain Construct Your Reality?<\/strong><\/h2>\n\n\n\n

Your brain doesn\u2019t just perceive reality\u2014reality is constructed by your brain<\/strong>. Robson explains that as you perceive the world<\/a> around you, your brain draws on information relayed by your senses as well as information inferred from your past experiences. In the process, your brain generates predictions about the sensory information<\/a> it receives, like when you see a fly and your brain predicts its path so that you can swat it away from your face. The brain constructs a representation of what it thinks is happening and what it predicts will happen, and you perceive this representation as reality.<\/p>\n\n\n\n

The brain relies heavily on these predictions. The visual cortex, the region of the brain<\/a> that processes information received from the eyes, has extensive connections to other brain regions that make predictions\u2014which illustrates how the brain is wired to rely on prior knowledge<\/strong>. Robson notes that it makes evolutionary sense for the brain to depend on predictions: Using predictions to inform perception reduces the amount of sensory information it has to process and enables it to focus on surprising sensory details, like the snake that you might just step on if your brain doesn\u2019t alert you to get out of the way. <\/p>\n\n\n\n

(Shortform note: Neuroscientists say that the brain makes predictions because it takes time<\/a> for visual information to travel from the retina through the brain to the visual cortex in the back of the brain<\/a>. If the brain didn\u2019t compensate for the delay, information would be outdated by the time it\u2019s processed. So the visual cortex relies on predictions to guess what\u2019s happening before the sensory information arrives, collaborating with other areas of the brain such as the hippocampus<\/a> to anticipate what will happen next. Scientists think that the brain operates this way because the world around us is ambiguous, and we have only so much processing power<\/a> to make sense of it\u2014so making predictions is a quick and efficient way to cope with those limitations.)<\/p>\n\n\n\n

Robson points out that although the brain is good at making predictions, it can sometimes get tripped up<\/strong>. Your feelings and expectations can bias your brain\u2019s predictions, like when you\u2019re feeling nervous<\/a> and your expectations about the situation make you think someone looks angry when they aren\u2019t. Though perception feels objective, it\u2019s not. Your body sometimes acts on your brain\u2019s mistaken predictions, creating expectation effects. (Shortform note: Experts say that if you\u2019re depressed, anxious, or irritable<\/a>\u2014or if you were exposed to violence or abuse as a child\u2014you\u2019re more likely to interpret someone else\u2019s expression as hostile when it isn\u2019t intended that way.)<\/p>\n\n\n\n

Understanding the Brain\u2019s Reliance on Predictions<\/strong><\/h3>\n\n\n\n

Many neuroscientists agree that the brain relies heavily on predictions, as Robson explains. They think that the brain is constantly making inferences and generating hypotheses about the causes of the sensory information it receives and that these hypotheses give rise to what we perceive. But critics say that the theory is far from definitive, and some researchers say that the evidence for it is only circumstantial<\/a>. <\/p>\n\n\n\n

Some researchers are building computational models, called artificial neural networks, to test the idea of a predictive brain<\/a>. What they\u2019ve learned is that the brain isn\u2019t a \u201cfeed-forward machine,\u201d or one in which information flows linearly from input to output. Instead, there\u2019s two-way traffic that proves crucial<\/a> for perception. Experts say this seems consistent with a predictive model of the brain, but they note that there are multiple ways to interpret every observation about the brain\u2019s activity. So while many find the evidence compelling, the predictive brain is still considered theory and not established fact.<\/p>\n","protected":false},"excerpt":{"rendered":"

Why does your brain rely on predictions? How does your brain create reality? Even when you don’t realize it, your brain is taking in everything around you. According to The Expectation Effect by David Robson, this helps create predictions that may or may not come true in the future. 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