It’s a given that we’ve all woken up with a case of Monday-itis today. The Monday blues are simply inevitable.
But what happens when it’s not a Monday? Why do we wake up on some days with the urge of wanting to scream at everyone without reason?
Well, according to a new study published in the Journal of Experimental Psychology: General, it all comes down to lack of sleep. While it might seem like common knowledge that you’re temper is more likely on the edge when you don’t get enough shut-eye, the researchers at Iowa State University pointed out that there has always been debate about whether actual sleep loss is to blame for feelings of anger or if preexisting anger is responsible for disrupting the sleep cycle.
To settle the discussion once and for all, the researchers recruited a group of participants and split them into two groups: one group continued with their normal sleep schedule, and the second was instructed to restrict their sleep by two to four hours a night for two nights.
The first group slept for an average of seven hours a night while the second slept for approximately four and a half hours.
Read more like this: This is how to score an extra hour’s sleep in 5 minutes, and these are 4 yoga poses to try before bedtime to help you get to sleep and stay asleep.
To rate their anger, participants were then asked to come into the lab after their sleep and rate a variety of products, once while listening to brown noise (which sounded like spraying water) and then while listening to harsher white noise (which sounded like static signal).
Zlatan Krizan, Ph.D., an Iowa State psychology professor and one of the study authors, explained these uncomfortable sounds trigger anger – an occurrence amongst the participants who were sleep-deprived.
“In general, anger was substantially higher for those who were sleep-restricted,” Dr Krizan said. “We manipulated how annoying the noise was during the task, and as expected, people reported more anger when the noise was more unpleasant. When sleep was restricted, people reported even more anger, regardless of the noise.”
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