The art of thinking · 2 · Perception and attention

Selective attention

Also known as: Focused attention, Cocktail party effect

German: selektive Aufmerksamkeit

In cognitive psychology, selective attention is the process by which a person focuses on some sources of information while others are filtered out or processed less fully, because perception and working memory cannot handle all available input at once.

Cognitive psychology
Attention

In one sentence

Selective attention is focusing on some inputs while others are filtered or weakened (Cherry 1953; Broadbent 1958; Treisman 1964).

Example

An operator who is reading a fault message on a panel does not register a colleague’s question — until the colleague says the operator’s name, which breaks through the filter.

What the research shows

E. Colin Cherry (1953) studied the “cocktail party problem” with dichotic listening: listeners who repeated (shadowed) a message in one ear could report almost nothing about the content of the message in the other ear, although they noticed physical changes such as a switch from a male to a female voice. Donald E. Broadbent (1958) explained this with an early filter that selects one channel by physical features. Neville Moray (1959) found that listeners often noticed their own name in the unattended ear, which a strict filter cannot explain. Anne M. Treisman (1964) therefore proposed that unattended input is attenuated rather than blocked, so that important or expected words can still pass. J. Anthony Deutsch and Diana Deutsch (1963) argued for late selection, after meaning has been analyzed.

Evidence status

That attention is selective and capacity-limited is among the best-established findings of cognitive psychology. Where selection happens — early, late or flexibly depending on the perceptual load of the task — is still debated; later work, for example Nilli Lavie's load theory, describes the locus of selection as variable. The cocktail party effect for one's own name is replicated but occurs only in a minority of listeners in many studies. Selective attention does not mean that unattended information has no effect at all.

How it applies

Pages, screens and work areas offer competing signals; what a reader attends to depends on the task and on what stands out. The glossary “Applied cognitive psychology for information use” covers the practical side, for example warning habituation and hazard perception. Placing a warning message where attention is at the moment of the hazardous step supports noticing it, but it does not replace protective measures from the risk assessment.

External references

How to read this pool

Entries, context cards and transitional topics

The art of thinking explains ways of thinking — where a method comes from, what it asks of you and how it was adapted later. You meet four kinds of content here, each with its own job:

Glossary entry: Defines one concept or method of thinking: its origin, an example and how it relates to neighboring ideas. “X vs. Y” sections set two methods side by side.
Context card of the art of thinking: A short, self-contained answer to one question about a way of thinking — its lineage, its steps, its limits. These cards are listed on The art of thinking only.
Transitional topicBridges both pools: A context card that bridges both pools: it shows how a way of thinking was adapted into documentation, analysis or quality practice. It sits with the reference context cards and is marked as transitional wherever it appears.
Reference entry or context card: Belongs to the Glossary & Norms Space on regulation, norms and engineering. Entries here link to one only where a method is also an established tool of documentation or quality work, such as the five whys or a user’s mental model.

All context cards of the art of thinking