Cognitive Interference:

Cognitive interference is when unwanted or intrusive thoughts, distractions, or worries disrupt our ability to focus. It takes up mental space needed for the primary activity with a negative impact on concentration and decision-making. This reduces performance on tasks, slows processing speed, and creates errors. Stressful situations often trigger cognitive interference, where negative/off-task worries intrude on our focus, such as trying to concentrate on studying while stressing over an upcoming deadline or being unable to focus on a conversation due to personal concerns. Also see Conflict Processing