"The human brain cannot truly multitask. Instead, it switches. And every switch carries a hidden cost. The cost is called 'attention residue.' It's the lingering cognitive activation that remains after you shift from one task to another."
"Sophie Leroy's 2009 study showed that the key to successful task switching is to get psychologically disengaged from the previous task even before its completion. Participants struggled to take their attention away from unfinished work, negatively impacting their performance."
"What mattered the most was whether the individuals felt a sense of cognitive closure or not. In some instances, this was made possible by the time pressure that forced the participants to disengage from the previous goal."
Modern work culture often promotes multitasking, but the human brain cannot truly multitask. Instead, it switches between tasks, which incurs a cognitive cost known as attention residue. This residue is the lingering cognitive activation that affects performance and mental fatigue. Research by Sophie Leroy indicates that successful task switching requires psychological disengagement from the previous task. Merely finishing a task does not eliminate interference; cognitive closure is essential for improved focus and productivity.
Read at Psychology Today
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