The truth about multitasking: Can the brain handle two tasks simultaneously?
has long been considered Multitasking an exceptional skill and a natural ability of the human brain to keep pace with the rapidly changing demands of the modern age. However, this long-held belief is now facing unprecedented scientific skepticism, after a recent study revealed that the human brain does not process two different tasks simultaneously, as is commonly believed, but rather relies on a strategy of rapid and sequential switching between them in the blink of an eye.
The productivity illusion: How did the obsession with simultaneous work begin?
To understand the historical roots of this concept, we must go back to the beginnings of the Industrial Revolution and continue to the modern digital revolution. In recent decades, with the advent of personal computers and smartphones, social and professional expectations have grown that humans should function like machines, capable of processing multiple pieces of data simultaneously. The belief has become widespread that the ability to multitask is the true measure of efficiency and success. Many organizations around the world have adopted this approach, placing significant pressure on individuals to train their brains to perform parallel tasks, ignoring the complex neurobiological nature of the human mind, which is inherently inclined towards single-track focus.
Details of the German study on brain capabilities
These groundbreaking findings were published in the prestigious Quarterly Journal of Experimental Psychology. The rigorous research was conducted by a joint team from Martin Luther University Halle-Wittenberg, Germany, the University of Hagen (for distance learning), and the Hamburg Medical School. During the experiments, participants were asked to perform two sensory tasks simultaneously: the first required them to use their right hand to indicate the size of a circle briefly displayed on a screen, and the second required them to identify the pitch of a sound they were hearing—whether it was high, medium, or low.
Fast navigation, not dual processing
Researchers measured participants' response speed and tracked the number of errors they made over several days of repeated testing. The team observed that with increased training, participants became faster and made fewer mistakes. For a long time, this improvement was seen as conclusive proof that the brain can process tasks in parallel. However, psychologist Torsten Schubert from the University of Halle explained that this phenomenon, previously known as "perfect time allocation," is not evidence of true parallel processing. Rather, the brain is remarkably adept at optimizing the sequence of processing steps so that they don't interfere with each other, emphasizing that this allocation has strict limits.
The impact of multitasking on our daily and professional lives
This study is of paramount importance and has far-reaching implications both locally and internationally, particularly in today's high-pressure work environments. The research team demonstrated that even very slight changes to the required tasks significantly increased the error rate and required participants to complete them much longer. In this context, psychologist Tilo Strobach from the Hamburg Medical School warned that attempting to multitask can become a real danger in everyday life. Examples include talking on the phone while driving or working in sensitive professions that require monitoring multiple systems, such as air traffic control or medical care. Our understanding of how the brain truly works will compel regional and international organizations to reassess their employee evaluation criteria, focusing on the quality of attention and deep concentration rather than the distractions of multitasking, which reduce productivity and increase the likelihood of catastrophic accidents.
