Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 22 for “"vocal communication"”.
-
ONTOGENY AND NEURAL MECHANISMS OF VOCAL COMMUNICATION IN MUS MUSCULUS
Innate vocalizations play a critical communicative role for both human and non-human animals. Infants of altricial species vocalize when hungry, cold, or isolated from caregivers and their nest environment. These ‘infant vocalizations’ are crucial for the survival of altricial infants, including …
-
Modelling the emergence of a basis for vocal communication between artificial agents
… learning to control an articulatory model of the vocal tract and perceiving the resulting signal through a biologically plausible artificial auditory system. By firmly establishing each aspect of our model in current phonetic theory, we are able to make useful claims and justify our inevitable …
-
The design and assembly of neural circuits for vocal communication in songbirds
… forebrain, with special emphasis on the High Vocal Center. Neuronal progenitors in the juvenile zebra finch brain were identified by fate mapping using engineered retroviruses. Multiple populations of neural progenitors appear to exist in the juvenile zebra finch brain, and each produces …
-
The role of social environment in shaping vocal communication systems in wild songbirds
For many taxa, vocal communication is an essential means of navigating continuously changing social and ecological environments. Among passerine birds, vocal signals are critical to survival and play an important role in mate attraction, territory defense, and predator avoidance. In my …
-
An analysis and classification of conductor vocal communication in the rehearsals of selected jazz ensembles
… was to determine the extent and nature of the vocal communication used in the rehearsals by conductors of selected jazz ensembles at the secondary school and collegiate levels.
-
Vocal Variability in Autism Spectrum Disorders: Assessment and Intervention to Increase Novel Vocalizations in Non-Verbal Children
… with the acquisition of new skills, including vocal communication. For many children with ASD who are unable to imitate others and who have limited vocal repertoires, few vocal training interventions are available. Research on operant variability, however, indicates that the direct …
-
Differences in the Communicative Behavior and Neurobiology of Chimpanzees (Pan troglodytes) and Bonobos (Pan paniscus)
… and bonobos have distinctly different vocalizations, but it is unclear why these differences have evolved. We hypothesized that differences in habitat and feeding ecology have selected for bonobos to have an increased reliance on vocal communication compared to chimpanzees. To evaluate …
-
ON THE ROLE OF VOCAL EMOTIONS FOR VERBAL MEMORY: AN INVESTIGATION OF NEURAL AND PSYCHOPHYSIOLOGICAL MECHANISMS
… substrates underlying the influence of vocal emotions on verbal memory. Heart rate and fMRI data were acquired while participants performed a verbal memory task comprising an encoding phase (memorizing words) and a test phase (memory recognition). During encoding, attending to sad as …
-
The Role of Parent Responsiveness and Vocal Complexity in Expressive Language Outcome: Intervention Effects in Toddlers at Risk for ASD and Language Impairment
… with: a) ASD (7-19%), which is defined by social communication impairments; or b) other language and/or cognitive delays (14-20%) by age three. Vocal complexity, a measure of the quality and maturity of vocal communication, seems to be a strong predictor of later expressive language in typically …
-
The Role of Male Vocal Signals During Male-Male Competition and Female Mate Choice in Greater Prairie-Chickens (<i>Tympanuchus cupido</i>)
In many taxa, vocal communication plays an integral role in aggression, territorial defense, and female choice. The acoustic structure of vocalizations is influenced by physical constraints on the vocalizer, suggesting a potential for discrimination among individuals. In the lek-mating Greater …
-
Cloning and Characterization of the Vasopressin-Oxytocin Neuropeptide Signaling System in the Vocal Control System of the Zebra Finch (Taeniopygia guttata)
… acquisition and maintenance can be well study in vocal learning birds. Here, in addition to reviewing the pertinent literature, I clone VTR1A, VTR1B, VTR2A, and OTR, as well as VP-neurophysin, OT-neurophysin, and CAMP Responsive Element Binding Protein 3 Like 1 (CREB3L1), a transcription factor …
-
Influence of Mouse Motor Cortex on Vocal Musculature
<p>Learned vocal communication and spoken language are complex behaviors we have long sought to understand. Studying the neurobiology of speech and language will be advanced by investigating its component traits in model organisms. Most vertebrates share common brainstem circuits for vocalization, …
-
Call Combinatoriality in Birds
The structural diversity of vocal communication systems across birds not only reflects considerable variation in repertoire size, but also in the organisation of acoustic elements, both within and across calls. A fundamental challenge for understanding this variation lies in the subjective nature …
-
The impact of voice on trust attributions
… On the one hand, trust is necessary for vocal communication to be meaningful. On the other hand, humans have developed a way to infer someone’s trustworthiness from their voice, as well as to signal their own. Yet, research on trustworthiness attributions to speakers is scarce and …
-
Socioecology, Acoustic Communication and Demography of Asian Elephants in Sri Lanka
SOCIOECOLOGY, ACOUSTIC COMMUNICATION AND DEMOGRAPHY OF ASIAN ELEPHANTS IN SRI LANKA Shermin de Silva (Author) Dorothy L. Cheney (Supervisor) Comparison of behavior across species brings to light the underlying social and ecological factors that have shaped social organization and communication. …
-
Individual variation in cooperative behaviour in meerkats
… Finally, I examine the extent to which vocal communication between carers and young is influenced by variation in contributions to cooperation. Females are more sensitive to increased begging rate (Chapter 6), which reflects general sex differences in cooperative behaviour. Carers modify …
-
A comparative analysis of auditory perception in songbirds: Eurasian jays (Garrulus glandarius) and great tits (Parus major)
… to react to or interact with the stimulus. Vocal communication between and within species allows appropriate responses to predators, enemies, kin and partners. Songbirds have often been studied due their impressive but varied vocal learning abilities. The main objective of this thesis is to …
-
Evidence of Language Prerequisites in Pan: Orofacial-Motor and Breath Control in Chimpanzees and Bonobos
… OFM and BC due to their stronger reliance on vocal communication compared to chimpanzees. To test this hypothesis, different groups of a total of forty-three apes (24 chimpanzees and 19 bonobos) were trained to protrude their lower lip and tongue, inhale to retrieve a food item, and exhale to …
-
Transcriptomic Signatures of Projection Class Neurons for Vocal Control
<p>Vocal learning is the ability to modify acoustic structure and syntax of vocalizations. This rare trait is thought to have independently evolved three times in birds and five times in mammals. Vocal learning species exhibit an underlying convergence in brain circuitry, including a direct, …
-
Blissymbolics as an Augmentative Communication Tool for Adults with Expressive Aphasia
… whether Blissymbolics - a visual-graphic communication system based on meaning rather than phonetics - could be used as a means of communication re-training with adults having expressive aphasia. This study investigated the performance of those individuals who had plateaued in re-learning …
Page 1 of 2