What best describes the developmental event when an infant shifts from language-general to language-specific phonetic perception?

What best describes the developmental event when an infant shifts from language-general to language-specific phonetic perception?

• A. The infant learns language-specific strategies for perceiving phones that are functionally significant in the ambient language(s).
• B. The infant stops perceiving foreign language consonants first and later loses the ability to perceive foreign language vowels.
• C. Brain cells responsible for perceiving foreign language phones are selectively eliminated (pruned) because of a lack of environmental stimulation.
• D. Prosodic bootstrapping helps the infant discover the acoustic properties of the phonemes that are used contrastively in the ambient language.

Answer: (A)

Infants start with broad sensitivity to many phonetic contrasts, but with exposure to their native language they tune their perception to the distinctions that actually matter in that language. This shift is about learning language-specific strategies for perceiving phones that carry functional significance for distinguishing words in the ambient language. In other words, they learn to weight and use perceptual cues that signal phonemic contrasts in their environment, while less-attended-to contrasts fade in salience. That is why the best description is the development of language-specific perceptual strategies focused on functionally meaningful distinctions. The other ideas don’t capture this targeted perceptual reorganization: phoneme discrimination isn’t simply about neural pruning due to lack of stimulation, and prosodic bootstrapping explains how prosody helps map structure rather than the core shift in phonetic perception toward native contrasts.

Infants start with broad sensitivity to many phonetic contrasts, but with exposure to their native language they tune their perception to the distinctions that actually matter in that language. This shift is about learning language-specific strategies for perceiving phones that carry functional significance for distinguishing words in the ambient language. In other words, they learn to weight and use perceptual cues that signal phonemic contrasts in their environment, while less-attended-to contrasts fade in salience. That is why the best description is the development of language-specific perceptual strategies focused on functionally meaningful distinctions. The other ideas don’t capture this targeted perceptual reorganization: phoneme discrimination isn’t simply about neural pruning due to lack of stimulation, and prosodic bootstrapping explains how prosody helps map structure rather than the core shift in phonetic perception toward native contrasts.