cocktail party effect
Summary
The cocktail party effect is selective attention: you can focus on one conversation in a noisy room, yet often notice your own name in an ignored one. It shows unattended input gets some processing, as Treisman's attenuation model and late-selection models propose.
Detail
Meaning: The cocktail party effect is the ability to focus on one auditory stream, such as a single conversation, while tuning out other talk around you. Yet personally meaningful input, especially your own name, often breaks through from the ignored stream. Colin Cherry studied it with dichotic listening: a different message goes to each ear and the subject shadows (repeats aloud) one. Subjects usually noticed physical features of the ignored message, such as a change in pitch, but little of its content.
On the MCAT: Expect a passage describing a dichotic listening or shadowing experiment. Broadbent's filter model (early selection) blocks the unattended message before meaning is analyzed, so it struggles to explain hearing your name. Treisman's attenuation model says the unattended signal is weakened, not blocked, and words with a low threshold, like your name, still get through. Late-selection models (Deutsch and Deutsch) say incoming input is analyzed for meaning before selection.
Common confusion: The effect is not perfect filtering or divided attention. Attention is limited, so the filter leaks for salient stimuli; it does not mean you follow two conversations at once.
Sources
- Psychology
- Cognitive Psychology
Written for the MCAT and checked before it was published. For study reference only. Spotted an error? Let us know.