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Equation 1 · Part 2 · The Language Instinct on Trial: Chomsky, Pinker, and the Pirahã

Symbol P

TP(Y∣X)=frequency of X followed by Yfrequency of XTP(Y \mid X) = \frac{\text{frequency of } X \text{ followed by } Y}{\text{frequency of } X}
PP

What this part means

P is part of the quantity the equation computes from the expression on the right.

Its job in the formula

P is part of the quantity the equation computes from the expression on the right.

The passage around this formula

While the recursion debate ran on argument and reanalysis, a separate research program was accumulating experimental results that never claimed to resolve the poverty-of-the-stimulus question but did show that infants arrive with more general-purpose statistical machinery than a strict nativist account had reason to expect. Jenny Saffran, Richard Aslin and Elissa Newport’s 1996 Science paper remains the field’s most cited demonstration. Eight-month-old infants heard two minutes of a continuous, monotone synthetic speech stream built from four made-up three-syllable “words,” with no pauses, stress cues, or other surface markers at word boundaries; the only information available to distinguish…

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Learn the underlying idea

A function assigns an output to each allowed input. The expression f(x) means “apply f to x”.

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Sources cited in the surrounding passage

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