香蕉视频

Stress increases people鈥檚 tendency to avoid cognitively demanding tasks, without necessarily altering their ability to perform those tasks, according to new research from 香蕉视频.

鈥淕enerally speaking, people are demand-averse,鈥� says Ross Otto, an assistant professor of psychology at McGill and the senior author of a recent paper in Psychological Science. 鈥淸Our study showed] stress increases that aversion.鈥�

Study participants had to choose between repeating a single task over and over, or the more cognitively demanding process of frequently switching from one kind of task to another.

"Frequently switching between two simple tasks, such as moving between working on a spreadsheet and responding to emails,聽requires a greater level of effort than, say, performing just one of these simple tasks, or having to switch between the two tasks infrequently,鈥� explains Otto.

鈥淔or example, consider a day where email notifications constantly pop up, indicating you need to change tasks and respond to that email, versus a day where you receive few emails, meaning fewer times you need to switch tasks. It鈥檚 not hard to imagine that one of these situations is more demanding than the other鈥�

To see whether participants made different choices when they were stressed, the researchers used a scenario resembling a job interview to induce a stress response in half of the study participants. They then compared the choices made by individuals under acute stress against those of a control group.

While previous research has demonstrated that cognitive performance declines when we are under stress, the McGill study aimed to tease out the respective roles of motivation and ability in that equation.

鈥淭he interesting thing is the stress effects didn鈥檛 come out in performance,鈥� Otto says. 鈥淪o, it's not that the study participants were worse at either the more demanding or the less demanding task 鈥� their performance was no different; it鈥檚 just that when you give them the choice of whether they want to do one or the other, stress increases their unwillingness to invest effort.鈥�

The experiment

In the experiment, participants were shown a series of numbers, coloured either blue or yellow. If it was one colour, they had to say whether the number was odd or even; if it was the other colour, they had to say whether the number was greater or less than five. The experiment was designed in such a way that participants were given cues which聽they would soon discover聽allowed them to choose which way the tasks were going to go 鈥� lots of repetition (less demanding)聽or lots of switching (more demanding). The participants鈥� response to these cues was what the researchers measured as an indicator of willingness to engage in cognitively demanding tasks 鈥� most people preferred the less demanding option, but they preferred it even more when they were聽stressed.

About the study

鈥溾�� by Mario Bogdanov et al. was published in Psychological Science.

DOI:

The research received funding from the German Academic Exchange Service, the Natural Sciences and Engineering Research Council of Canada, the Fonds de Recherche du Qu茅bec (Nature et Technologies), and the Canadian Foundation for Innovation.