'Inattention blindness' due to brain load

"When we focus intently on one task, we often fail to see other things in plain sight - a phenomenon known as 'inattention blindness'.

Scientists already know that performing a task involving high information load - a 'high load' task - reduces our visual cortex response to incoming stimuli. Now researchers from UCL Institute of Cognitive Neuroscience have examined the brain mechanisms behind this, further explaining why our brain becomes 'blind' under high load." Read more: Medical Express