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Forgot how to focus? Maybe the reason is the fever of multitasking. For decades this "skill" was praised, but now we know it harms memory retention (even causing memory loss), increases stress, and lowers IQ.

Does multitasking make you dumber? What Multitasking does to your brain? These and other questions were answered by authors like Cal Newport and Nir Eyal. In this video, we give you an answer in 7 minutes.


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A video inspired by an article published by https://expatriateconsultancy.com/

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🔎 VIDEO EXCERPT 🔎
Multitasking weakens your memory
To multitask with frequency damages our memory. It is even worse when it involves multiple media sources.
According to a published paper from the University of California and Stanford University, people who often engage with many media sources at the same time showed worse results on simple memory assignments.
We are talking here about the so-called Heavy media multitaskers. They have multiple media channels open at once, switching between them. A student writing his thesis on a laptop, while occasionally checking the TV, responding to Facebook messages, and then getting back to writing, for example.
People similar to the example given above showed a higher probability of experiencing lapses of attention. The attention lapses then contributed to poor performance on cognitive memory tasks.
One explanation from the researchers is that we never truly multitask, but we task-switch. The constant and frequent task switching reduces efficiency. And this is not the only problem caused by it, which we will cover again later in this article.
Multitasking reduces the ability to mobilize your executive functions
Our brains have a set of tools called executive functions. They manage cognitive processes and decide how, when, and in what order tasks are performed. According to the researchers Joshua Rubinstein, Jeffrey Evans, and David Meyer, this happens in two stages:
Goal shifting: Deciding to do one thing instead of another
Role activation: Changing from the rules for the previous task to rules for the new task
The time between the two stages may be only a second. However, when we are task-switching all the time — remember that in reality, nobody multitasks, but task-switch — these seconds will add up and become minutes, maybe hours of extra-work. According to Meyer, productivity may fall as much as 40% by the mental blocks caused by switching tasks.
Multitasking lowers your IQ
Grey-matter is one of the main parts of your brain. It contains most of the brain’s neuronal cell bodies and includes parts involved in muscle control, sensory perception such as seeing and hearing, memory, emotions, speech, decision making, and self-control.
Explanations made, let’s dive into where it gets interesting:
Scientists at the University of Sussex obtained MRI scans of people spending long periods on various devices, like texting while watching a movie. The scans showed lower grey-matter density. This likely means they had less cognitive control and were prone to suffer from a poor attention span.
Multitasking increases stress levels