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Neurons of the song motor control nucleus robustus archistriatalis (RA) exhibited far weaker auditory responses in awake than in anesthetized zebra finches. Remarkably, sleep induced complex patterns of bursts in ongoing activity and uncovered vigorous auditory responses of RA neurons. Local injections of norepinephrine suggested that the changes in(More)
Variation is a ubiquitous feature of speech. Listeners must take into account context-induced variation to recover the interlocutor's intended message. When listeners fail to normalize for context-induced variation properly, deviant percepts become seeds for new perceptual and production norms. In question is how deviant percepts accumulate in a systematic(More)
This paper reviews the organizational principles and implications that have emerged from the analysis of HVc, a forebrain nucleus that is a major site of sensory, motor, and sensorimotor integration in the song control system of oscine passerine birds (songbirds). Anatomical, physiological, and behavioral data support the conclusion that HVc exists within a(More)
Cross-linguistically, vowel duration is often found to be inversely related to the approximate average f 0 ; all else being equal, vowels on low tones are longer than those on high tones, while vowels on rising tones are longer than those on falling tones. This type of interplay between tonal contrasts and duration is commonly reflected in the world's(More)
Recent years have witnessed the emergence of a cluster of approaches in linguistic theory known as exemplar-based models. Such exemplar-based models are being developed in research domains as diverse as phonetics, phonology, morphology, historical linguistics, semantics, syntax, and language acquisition. This special issue brings together, for the first(More)
In this paper we address the long-standing issue of how prosodic patterns are linked to meanings. We explore the idea that prosodically realized communicative functions, such as focus and sentence modality, are analogous to lexical morphemes, the smallest sound units that carry meaning. We considered evidence of a four-way similarity between lexical(More)
Perceptual compensation for coarticulation (PCCA) refers to listener responses consistent with perceptual reduction of the acoustic effects of the coarticulatory context on a target sound. The robustness of PCCA across individuals and across tasks have not been studied together previously. This study reports the results of two experiments designed to(More)
Numerous studies have documented the phenomenon of phonetic imitation: the process by which the production patterns of an individual become more similar on some phonetic or acoustic dimension to those of her interlocutor. Though social factors have been suggested as a motivator for imitation, few studies has established a tight connection between(More)