Selective attention is the brain’s ability to focus on what is relevant to the current goal while filtering out everything else, which also means people routinely miss things in plain sight.
Overview
At any moment, people are surrounded by far more information than they can process. Selective attention is the filter that decides what gets through. At a noisy party, you can follow one conversation while tuning out the rest, yet still notice if someone across the room says your name. Researchers call this the cocktail party effect.[1][2]
The flip side is that people often fail to notice things they are not looking for, even when those things are obvious. In a well-known experiment, roughly half of viewers counting basketball passes in a video failed to notice a person in a gorilla suit walking through the scene. This is called inattentional blindness.[3][4]
On screens, selective attention means people focus intensely on their current task and ignore anything that seems unrelated, including content that looks like advertising (“banner blindness”) and changes that happen outside their focus (“change blindness”).[5][6]
Why it matters
Important information that is not where people are looking, or that looks like something they normally ignore, effectively does not exist. Missed warnings, overlooked status changes, and ignored announcements lead to errors and repeated support requests.
Attention is also a finite resource for an organization’s whole portfolio. When every product competes for it with banners, pop-ups, and notifications, people learn to tune all of them out, including the ones that matter.
Key takeaways
- People see what they are looking for. Place critical information directly in the path of the task, not off to the side.
- Do not make important content look like an ad. Banners, carousels, and brightly colored boxes are often ignored entirely.[5]
- Make changes noticeable. When something updates on screen, show it near the person’s focus or highlight the change.[6]
- Use emphasis sparingly. If everything is highlighted, nothing stands out (see Von Restorff Effect).
- Reduce competing noise. Every extra notification, badge, and alert weakens the impact of the important ones.
- Support scanning. People scan in predictable patterns; put the most important words first in headings, labels, and messages.[7]
In practice
Common patterns in business applications, portals, and internal tools:
Designs that work with it | Designs that work against it |
|---|---|
Validation errors appear next to the field and are announced clearly. | A single error message at the top of a long form, out of view. |
Critical system notices appear inline, in context, and in plain styling. | Important announcements in a rotating banner carousel. |
Updated values are briefly highlighted when they change. | Totals or statuses that silently change in a corner of the screen. |
Notifications are limited to what requires attention or action. | Frequent low-value alerts that teach people to dismiss everything. |
Headings and labels lead with the key information. | Key details buried at the end of long sentences. |
Questions to ask in a design review
- Where will people be looking at this moment in their task, and is the critical information there?
- Does anything important look like an advertisement or decoration?
- If something changes on this screen, how will people notice?
- How many things on this screen are competing for attention?
Origin
Research on selective attention began in the 1950s. In 1953, British scientist Colin Cherry studied how people can follow one voice among many, describing what became known as the cocktail party effect.[8] Psychologist Donald Broadbent proposed in 1958 that attention works like a filter, and later researchers such as Anne Treisman refined the model.[2]
In 1999, Daniel Simons and Christopher Chabris published their “gorillas in our midst” study, which made inattentional blindness widely known.[3] UX researchers later documented banner blindness and change blindness in digital interfaces.[5][6]
Related concepts
- Von Restorff Effect — the distinctive item is the one noticed and remembered
- Cognitive Load — attention is limited and easily overwhelmed
- Feedback — feedback must appear where people are looking
- Signifiers — cues must be noticed to be useful
- Flow — deep focus that interruptions break
- Aesthetic-Usability Effect — visual design shapes where attention goes
References and further reading
- Yablonski, J. Selective Attention. Laws of UX. https://lawsofux.com/selective-attention/
- Wikipedia. Cocktail Party Effect. https://en.wikipedia.org/wiki/Cocktail_party_effect
- Simons, D. J., and Chabris, C. F. (1999). Gorillas in Our Midst: Sustained Inattentional Blindness for Dynamic Events. Perception, 28(9). https://doi.org/10.1068/p281059
- Wikipedia. Inattentional Blindness. https://en.wikipedia.org/wiki/Inattentional_blindness
- Nielsen Norman Group. Banner Blindness Revisited: Users Dodge Ads on Mobile and Desktop. https://www.nngroup.com/articles/banner-blindness-old-and-new-findings/
- Nielsen Norman Group. Change Blindness in UX: Definition. https://www.nngroup.com/articles/change-blindness-definition/
- Nielsen Norman Group. F-Shaped Pattern of Reading: Misunderstood, But Still Relevant. https://www.nngroup.com/articles/f-shaped-pattern-reading-web-content/
- Cherry, E. C. (1953). Some Experiments on the Recognition of Speech, with One and with Two Ears. Journal of the Acoustical Society of America, 25(5). https://doi.org/10.1121/1.1907229
- Yablonski, J. Laws of UX (format inspiration for this series). https://lawsofux.com/