 Attention is manifested by an attentional bottleneck, in term of the amount of data the brain can process each second, for example, in human vision, only less than 1% of the visual input data (at around one megabyte per second) can enter the bottleneck, leading to inattentional blindness.Attention remains a crucial area of investigation within education, psychology, neuroscience, cognitive neuroscience, and neuropsychology.Areas of active investigation involve determining the source of the sensory cues and signals that generate attention, the effects of these sensory cues and signals on the tuning properties of sensory neurons, and the relationship between attention and other behavioral and cognitive processes, which may include working memory and psychological vigilance.