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1	Disconnection of a Basal Ganglia Circuit in Juvenile Songbirds Attenuates the Spectral Differentiation of Song Syllables
	Kevin C. Elliott; Wei Wu; Richard Bertram...
	In: http://www.math.fsu.edu/~bertram/papers/birdsong/Devel_Neuro_14.pdf (2013)
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2	Self-Organization of Early Vocal Development in Infants and Machines: The Role of Intrinsic Motivation
	Moulin-Frier, Clément; Nguyen, Sao Mai; Oudeyer, Pierre-Yves
	In: ISSN: 1664-1078 ; Frontiers in Psychology ; https://hal.inria.fr/hal-00927940 ; Frontiers in Psychology, Frontiers, 2013, 4 (1006), ⟨10.3389/fpsyg.2013.01006⟩ ; http://www.frontiersin.org/Journal/10.3389/fpsyg.2013.01006/abstract (2013)
	Abstract: International audience ; We bridge the gap between two issues in infant development: vocal development and intrinsic motivation. We propose and experimentally test the hypothesis that general mechanisms of intrinsically motivated spontaneous exploration, also called curiosity-driven learning, can self-organize developmental stages during early vocal learning. We introduce a computational model of intrinsically motivated vocal exploration, which allows the learner to autonomously structure its own vocal experiments, and thus its own learning schedule, through a drive to maximize competence progress. This model relies on a physical model of the vocal tract, the auditory system and the agent's motor control as well as vocalizations of social peers. We present computational experiments that show how such a mechanism can explain the adaptive transition from vocal self-exploration with little influence from the speech environment, to a later stage where vocal exploration becomes influenced by vocalizations of peers. Within the initial self-exploration phase, we show that a sequence of vocal production stages self-organizes, and shares properties with data from infant developmental psychology: the vocal learner first discovers how to control phonation, then focuses on vocal variations of unarticulated sounds, and finally automatically discovers and focuses on babbling with articulated proto-syllables. As the vocal learner becomes more proficient at producing complex sounds, imitating vocalizations of peers starts to provide high learning progress explaining an automatic shift from self-exploration to vocal imitation.
	Keyword: [INFO.INFO-LG]Computer Science [cs]/Machine Learning [cs.LG]; [SCCO.COMP]Cognitive science/Computer science; curiosity-driven learning; goal babbling; Imitation; Interactive Learning; intrinsic motivation; self-organization; Vocal Development
	URL: https://hal.inria.fr/hal-00927940/file/frontiers.pdf https://hal.inria.fr/hal-00927940/document https://doi.org/10.3389/fpsyg.2013.01006 https://hal.inria.fr/hal-00927940
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3	Prelinguistic vocalizations of an infant with autism from 9 to 12 months: observing risk factors of speech disorder in canonical babbling stage?
	Masson, Caroline
	In: 19ème Congrès International des Linguistes - Workshop "Language and Mind in Autism" ; https://hal.archives-ouvertes.fr/hal-00848722 ; 19ème Congrès International des Linguistes - Workshop "Language and Mind in Autism", Jul 2013, Genève, Switzerland (2013)
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