The irrelevant speech effect refers to the degradation of serial recall when speech sounds are presented, even if the list items are presented visually. The sounds need not be a language the participant understands, nor even a real language - human speech sounds are sufficient to produce this effect.
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Famous quotes containing the words irrelevant, speech and/or effect:
“Long enough I had heard of irrelevant things; now at length I was glad to make acquaintance with the light that dwells in rotten wood. Where is all your knowledge gone to? It evaporates completely, for it has no depth.”
—Henry David Thoreau (1817–1862)
“Speech and prose are not the same thing. They have different wave-lengths, for speech moves at the speed of light, where prose moves at the speed of the alphabet, and must be consecutive and grammatical and word-perfect. Prose cannot gesticulate. Speech can sometimes do nothing more.”
—James Kenneth Stephens (1882–1950)
“The second [of Zeno’s arguments about motion] is the one called “Achilles.” This is to the effect that the slowest as it runs will never be caught by the quickest. For the pursuer must first reach the point from which the pursued departed, so that the slower must always be some distance in front.”
—Zeno Of Elea (c. 490–430 B.C.)