Ted Mosby from ‘How I Met Your Mother’ said that nothing good happens after 2 in the morning and it makes sense because tiredness and sleep are not good advisors. And if you are out and have had a drink, even more so: it is better not to send messages that you will later regret.
Well, there is another time when it is better not to make important decisions: when it is very hot. I’m not saying it, science says it. Given how hot it is being this summer that has just begun, it is better to take it easy.
Take it easy. In a study carried out by a research team from Monash Business School, they analyzed how temperature affects the ability to make rational decisions. The most striking fact is that it is not the hot days that affect the most, but the nights. More specifically, those with temperatures above 25°C.
As we are suffering in our flesh these days, those torrid nights worsen the quality of sleep and the deprivation of rest takes its toll on cognitive performance the next day, especially affecting mathematical tasks necessary to evaluate economic risks. This relationship between sleep and cognition is not new: sleep deprivation impairs executive function, working memory, and impulse control.
Why it is important. First, because throughout the day we make many decisions (most of them small) that, accumulated over time, can generate lasting consequences over time. An example: a compulsive purchase instead of saving it.
Furthermore, the study shows that this effect distinguishes between social classes: it hits households with lower incomes hardest, where air conditioning (having it or turning it on) is a luxury. Thermal discomfort is not something specific: it is a reality that summers are getting hotter and the heat waves follow one another with greater intensity and they arrive more frequently.
Context. For the study they used the Indonesian Family Life Survey, which uses data from thousands of families in the Asian country over years, along with temperature data from NASA satellites. This way they were able to discern daytime temperatures from nighttime temperatures. The work is part of research on climate and economic behavior: there is already evidence that heat lowers our productivity, but aggressiveness and risk behavior also increase.
In detail. The mechanism that explains these bad decisions is lack of sleep and/or low-quality sleep. That deprivation It disproportionately affects numerical and calculation skills, more than other cognitive abilities. These mathematical skills are precisely those that support decisions about risk or that have their consequences in different time frames.
Yes, but. The study focuses on a single country, with a particular climate and socioeconomic conditions, so extrapolation to other places requires some caution. In addition, there are other factors like pollution, the right hand of heatwhich also affect cognitive performance
In Xataka | The silent effect of the extreme heat wave: your usual drugs turn against you
Cover | Vladislav Babienko and Immo Wegmann
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