Acoustic-phonetic description of infant speech samples: coding reliability and related methodological issues

Acoustic-phonetic differences between infant- and adult-directed speech: the role of stress and utterance position.

Previous studies have shown that infant-directed speech (IDS) differs from adult-directed speech (ADS) on a variety of dimensions. The aim of the current study was to investigate whether acoustic differences between IDS and ADS in English are modulated by prosodic structure. We compared vowels across the two registers (IDS, ADS) in both stressed and unstressed syllables, and in both utterance-m...

Infant sleep interventions - Methodological and conceptual issues.

RUNNING HEAD: Acoustic-Phonetic Differences in IDS and ADS Acoustic-Phonetic Differences between Infant- and Adult-directed Speech: The Role of Stress and Utterance Position

Previous studies have shown that infant-directed speech (IDS) differs from adultdirected speech (ADS) on a variety of dimensions. The aim of the current study was to investigate whether acoustic differences between IDS and ADS in English are modulated by prosodic structure. We compared vowels across the two registers (IDS, ADS) in both stressed and unstressed syllables, and in both utterance-me...

Polish infant directed vs. adult directed speech: Selected acoustic-phonetic differences

Infant-directed speech (IDS) is reported to differ significantly from adult-directed speech (ADS) in its acoustic-phonetic properties. In IDS, phonetic features of individual speech sounds tend to be intensified [6, 14, 20]. An example phenomenon documented for IDS in several languages is vowel hyperarticulation [25]. Thus, the formant frequency values (F1, F2) vary in the two target speaking s...

Running head: RELIABILITY IN INFANT SPEECH PERCEPTION 1 Test-retest reliability in infant speech perception tasks

A long line of research investigates how infants learn the sounds and words in their ambient language over the first year of life, through behavioral tasks involving discrimination and recognition. More recently, individual performance in such tasks has been used to predict later language development. Does this mean that dependent measures in such tasks are reliable and can stably measure speec...