Attentional blink is a brief window after you notice one target when a second target is harder to detect or identify. In Intro to Brain and Behavior, it shows the limits of attention and working memory during fast visual processing.
Attentional blink is the brief drop in awareness that happens in Intro to Brain and Behavior when one target in a fast visual stream makes it harder to notice a second target that appears soon after. The usual gap is about 200 to 500 milliseconds, so the missed item is not gone, it is just arriving while your attention system is still busy processing the first one.
A common way to show this is with rapid serial visual presentation, or RSVP. In an RSVP task, words, letters, or pictures flash one after another very quickly. If participants are told to report two target items, they usually do well on the first one but often miss the second one when it appears too soon after the first. That pattern is the attentional blink.
This is not the same as failing to see the second item because it was too dim or hidden. The second target can be visible, but your brain is in a short processing bottleneck. Attention and working memory are tied up encoding the first target, so the second target has a smaller chance of being selected, consolidated, and reported.
The idea connects to selective attention and the attentional bottleneck. Your brain can take in a lot of visual information, but it cannot fully process every piece at once. When the first target gets attention, it temporarily limits how much extra information can get through, especially if the task is demanding or the person is already under high cognitive load.
People sometimes describe attentional blink as if the brain literally turns off vision, but that is too strong. Perception keeps going. The real issue is that conscious identification and short-term encoding are delayed for the second target. In some cases, training or repeated practice can reduce the size of the blink, which suggests attention efficiency can improve with experience.
Attentional blink shows one of the cleanest limits on attention in Intro to Brain and Behavior. It gives you a concrete example of how the brain can process visual input without making all of it available to awareness or report. That makes it a useful bridge between perception, attention, and working memory.
The concept also helps explain why fast information streams are hard to monitor. If you are reading a rapid sequence of stimuli, watching a brief RSVP display, or scanning for two targets in a lab task, your accuracy changes depending on timing, not just effort. The second target is most likely to be missed when it arrives during the blink window, which is a useful cause-and-effect pattern to recognize.
This term also matters because it connects to real brain-behavior questions about bottlenecks. When a course asks why attention seems limited, attentional blink gives a sharp answer: there is a short period when the system is still encoding one item and is less ready for the next. That idea fits with topics like cognitive load, selective attention, and prefrontal control of attention.
If you are studying neural mechanisms of attention, attentional blink is a good example to bring up in class discussion or short answers. It shows that attention is not just about noticing more. It is about timing, prioritizing, and deciding which information gets fully processed first.
Keep studying Intro to Brain and Behavior Unit 10
Visual cheatsheet
view galleryselective attention
Attentional blink is a special case of selective attention limits. You are still processing the stream, but your attention system prioritizes the first target and the second one loses out if it arrives too soon. This helps show that selecting one item can temporarily reduce your ability to select another.
cognitive load
Higher cognitive load usually makes the blink more noticeable because more mental resources are already being used. If the first target takes effort to identify or remember, less capacity is left for the next item. That is why difficult RSVP tasks often produce a stronger attentional blink.
attentional bottleneck
The attentional bottleneck idea explains the mechanism behind the blink. The brain can receive many inputs, but only a limited amount can be fully encoded at one time. Attentional blink is the visible result of that temporary processing limit in a rapid sequence.
dorsolateral prefrontal cortex
The dorsolateral prefrontal cortex is linked to executive control and maintaining task goals during attention tasks. In attentional blink research, it is part of the bigger picture of how the brain manages competing targets and keeps you focused on what counts.
A quiz question might show a rapid stream of letters or words and ask why the second target was missed. Your job is to identify attentional blink and connect it to the timing of attention, not to a visual defect. In a short answer or discussion post, you can explain that the first target occupies processing resources, so the second target is harder to encode when it appears within about half a second.
If the question gives an RSVP setup, look for the key clue that the targets are both visible but separated by a short delay. That detail points to attentional limits, especially selective attention and working memory, rather than simple sensory failure. You may also be asked to compare performance under high and low cognitive load, where the blink is usually stronger when the task is harder.
Attentional blink and change blindness both involve missing information, but they happen for different reasons. Attentional blink is a timing problem during rapid target processing, while change blindness is failing to notice a change in a scene, often because attention was elsewhere or the change was gradual. If the question involves two quick targets in a stream, think attentional blink.
Attentional blink is the short period after one target when a second target is harder to detect or identify.
The effect usually shows up in rapid serial visual presentation tasks, where stimuli appear very quickly in a stream.
It reflects a limit in attention and working memory, not a problem with the eyes or basic vision.
Higher cognitive load can make the blink stronger because more processing resources are already in use.
The term is a good example of how the brain prioritizes one piece of information before fully handling the next.
Attentional blink is the brief lapse in awareness that happens when a second target appears soon after a first target in a rapid visual sequence. You can still see the second item, but your brain is busy processing the first one, so the second is harder to report. It is a classic attention limitation, not a vision problem.
It happens because attention and working memory have limited processing capacity. When the first target is being selected and encoded, the second target may arrive during a short bottleneck. The brain can keep receiving information, but it cannot fully process both targets at the same time.
A common example is an RSVP task where letters flash one after another and you have to find two target letters. People usually catch the first target, then miss the second one if it appears within about 200 to 500 milliseconds. That pattern is the attentional blink effect.
No. Attentional blink happens because a second target arrives while the brain is still processing the first one. Change blindness is when you do not notice a change in a scene, often because your attention is elsewhere or the change is not obvious. They both involve missed information, but the mechanism is different.