Could your anger be linked to lack of sleep?

The Borneo Post - Nature and health - - Teens -

NEW RE­SEARCH in the US has found that even miss­ing out on just a cou­ple of hours sleep a night could make you an­grier and di­min­ish your abil­ity to adapt to cer­tain sit­u­a­tions. Car­ried out by re­searchers at Iowa State Uni­ver­sity, the new study looked at 142 par­tic­i­pants who were ran­domly as­signed to two groups.

One group was asked to main­tain their nor­mal sleep rou­tine for a pe­riod of two days, while the other was asked to re­strict their sleep by two to four hours each night for two nights. Par­tic­i­pants also rated their feel­ings of anger be­fore and after sleep dur­ing a test in the lab, in which they were asked to rate prod­ucts while lis- ten­ing to dif­fer­ent back­ground noises, de­signed to cre­ate frus­trat­ing sit­u­a­tions which could pro­voke anger.

The find­ings, pub­lished in the Jour­nal of Ex­per­i­men­tal

Psy­chol­ogy: Gen­eral, showed that those who main­tained their reg­u­lar sleep pat­tern got on av­er­age al­most seven hours of sleep a night, while those in the re­stricted group got about four and a half hours each night, which the re­searchers say re­flects the amount of sleep loss we reg­u­larly ex­pe­ri­ence in ev­ery­day life.

In ad­di­tion, the re­searchers also found that sleep re­stric­tion uni­ver­sally in­ten­si­fied feel­ings of anger, with co- author Zla­tan Krizan adding that sleep loss was found to uniquely im­pact anger, rather than sim­ply re­sult­ing from feel­ing more neg­a­tive in that mo­ment.

The study is one of the first to pro­vide ev­i­dence that a lack of sleep can spark feel­ings of anger, with pre­vi­ous re­search find­ing a con­nec­tion but not show­ing a causal re­la­tion­ship ac­cord­ing to the re­searchers. Sleep loss has also been linked to an in­crease in neg­a­tive emo­tions, such as anx­i­ety and sad­ness, and a de­crease in pos­i­tive emo­tions, such as hap­pi­ness and en­thu­si­asm. “In gen­eral, anger was sub­stan­tially higher for those who were sleep re­stricted,” Krizan said.–

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