What is dual-task interference?

Dual-task interference refers to the decreased performance in one cognitive task when a second task is also being performed simultaneously. This phenomenon occurs because cognitive resources are limited, and taking on multiple tasks can lead to competition for those resources. When an individual attempts to focus on two tasks at once, the brain struggles to allocate sufficient attention and cognitive capacity to both, resulting in a decline in performance on at least one of the tasks.

This concept is significant in fields such as psychology and neuroscience, as it highlights the limitations of human attention and the challenges involved in multitasking. Tasks that may not require much mental effort when performed alone can become significantly more challenging when combined with another task that demands cognitive resources.

In contrast to the other options, which suggest outcomes like accelerated learning, improved performance, or increased focus—none of which accurately capture the essence of dual-task interference—this choice succinctly identifies the core issue: that performing multiple tasks simultaneously can hinder an individual's ability to execute at least one of those tasks effectively. Understanding dual-task interference is crucial for developing strategies to improve task management and cognitive performance.