If you think about sleepiness or feeling tired, you likely think of it as a feeling or “state” as psychologists prefer to call it. Sleep researchers mostly see sleepiness as a sleep complaint, indicative of a lack of sleep, and define sleepiness as the “physiological inability to stay awake”. The vast majority of the sleep research on sleep deprivation and sleepiness has been focused on how sleepiness develops over the day, wears off at night, and what the negative health consequences related to the lack of sleep are.
Sleep as a motivational driver
We all know that sleep is a biological need to give the body and mind time to recover from the day before and prepare for the next one. For these essential needs, we have warning signals built-in. For instance, to meet your daily requirement of energy intake, you’ll get hungry, which then triggers you to eat. Feelings like hunger, thirst, and even sleep can be seen as a so-called primary motivational driver. And this study aimed to explore just that.
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