Monotasking

The scientific case against multitasking was established across several decades of cognitive psychology research. The key finding is that the brain cannot genuinely attend to two cognitively demanding tasks simultaneously. What appears to be multitasking is rapid alternation between tasks, and each alternation incurs costs: a startup time as attention reorients to the new task, and a residue from the previous task that continues to occupy working memory.

Researcher Sophie Leroy's attention residue studies demonstrated that people who are interrupted mid-task perform worse on the subsequent task than those who completed the prior task first, even when the interruption was brief. Gloria Mark's research at UC Irvine found that a typical knowledge worker is interrupted or self-interrupts every few minutes, and that it takes an average of 23 minutes to fully return to deep engagement with a task after interruption. When interruptions are frequent — as they are in notification-saturated work environments — sustained deep engagement with any single task becomes structurally impossible.

Monotasking as a deliberate practice works at several levels. The first is task structure: beginning a single task, working on it until either complete or a defined stopping point is reached, and only then moving to the next task. The second is environmental design: removing the physical and digital conditions that make interruption likely — phone in another room, notifications off, one browser tab open, door closed. The third is attention training: building the tolerance for difficulty that makes it possible to remain with a task when it becomes hard, rather than seeking relief by checking something else.

The experience of monotasking is qualitatively different from the multitasking norm. Initially, it can feel slow and uncomfortable — the desire to check something, to split attention, to be "more productive" is strong. Over time, practitioners report that focused single-task work is both more productive in measurable output and more satisfying in experience. Csikszentmihalyi's flow state — complete absorption in a task — is only accessible through monotasking; it cannot be achieved in the presence of divided attention.

The cultural context matters. Modern digital work environments are systematically organised against monotasking: open-plan offices, always-on communication platforms, the expectation of rapid response to messages, and operating systems designed with multitasking as the default. Effective monotasking often requires working against these environments — protecting blocks of single-task time against the structural pressure for availability.