According to research by David Strayer, director of the applied cognition lab at the University of Utah, 98% of people can’t multitask and don’t do either task as well when they try.
“Supertaskers,” on the other hand, make up a small 2% of the population and show no ill effects from multitasking.
In his research, Strayer put supertaskers through a series of tests including genetic evaluation and neuroimaging. The results indicated that supertaskers’ brains are structured differently than 98% of the population, and certain parts of the frontal cortex show less activity when multitasking.
The conclusion is that if you are a supertasker, you know it. If you are a monotasker, it’s best to focus on one thing at a time in order to perform better.