People who sleep well are often more positive, and this is due to how sleep affects their brains. Research shows that sleep deprivation mainly affects the part of the brain that processes positive and neutral memories, the hippocampus. The part that remembers negative things, the amygdala, is less affected. As a result, people who do not get enough sleep have more difficulty retrieving positive memories, but negative memories remain well ingrained. This means that lack of sleep has a negative impact on their mood and how they see the world around them.
Walker conducted an experiment that clearly demonstrates this effect. In this study, sleep-deprived students had to remember a list of words. The results showed that these students could remember 81% of words with a negative meaning, such as “cancer,” but only 31% of words with a positive or neutral meaning, such as “sunshine” or “basket.” This difference in memory performance shows how sleep deprivation causes people to focus more on negative information, which can lead to a more pessimistic worldview and a less positive mood.
Many people notice that they feel happier and more positive after a good night’s sleep. This is because enough sleep helps the brain process positive and neutral memories well. This allows you to look at the world more optimistically and balanced. In short, getting enough sleep is very important for maintaining a good mood and seeing the world in a balanced way.
