Scientific Study Reveals the Truth: The Human Brain Cannot Perform Two Tasks Simultaneously

A recent scientific study revealed that the human brain cannot execute two tasks at the same time as many believe, but rather processes tasks in a sequential and very rapid manner, giving a false impression of its ability to "multitask." The results of the study were published in the Quarterly Journal of Experimental Psychology after a series of experiments that examined how the brain handles more than one task at the same time.

A scientific experiment to test the brain's capacity

During the study, participants were asked to perform two sensory tasks simultaneously:
The first was to determine the size of a circle that appeared for a short time using the right hand, and the second was to distinguish a sound tone to see if it was sharp, medium, or low.
The researchers measured the response speed of the participants and the number of errors they made while performing the two tasks, repeating the experiment over several days to observe the effect of training.

Training improves performance but does not change the brain's mechanism

The results showed that participants became faster over time and made fewer mistakes after continuous training.
However, this improvement does not mean that the brain began processing the two tasks simultaneously, but rather that the brain learned to arrange the processing steps more efficiently, allowing it to quickly switch from one task to another.

The concept of "optimal time-sharing"

For a long time, scientists believed that improved performance with training was evidence of the brain's ability to process tasks in parallel.
However, psychologist Thorsten Schubert from the University of Halle explained that the new results indicate the opposite, confirming that what happens is what is called "optimal time-sharing," where the brain organizes processes one after the other at a very high speed.
Schubert stated that the brain is "very adept at arranging processes sequentially," but this method has clear limitations.

Minor changes increase errors

The study also showed that when very slight changes were made to the nature of the tasks, the error rate among participants increased, and they needed more time to complete them.
Twenty-five individuals participated in the experiments, undergoing three different trials to analyze how the brain deals with multitasking.

The risks of multitasking in daily life

Researchers believe that these results have practical significance in daily life, especially in activities that require high concentration.
Psychologist Thilo Strubach from Medical School Hamburg pointed out that attempting to perform multiple tasks at the same time can become dangerous in certain situations, such as driving a car or in professions that require handling multiple tasks simultaneously.
These results confirm that what is known as multitasking is merely a rapid transition between tasks, not genuine and simultaneous processing of them within the brain.