3/16/2023 0 Comments Laboratory songThen, over 20 weeks or so, the new syllable type gets connected to other syllables in a stepwise manner. Strikingly, human infant babbling also develops in a similar manner: each uttered syllable is first performed singly, reduplicated, or at an utterance edge. We found that Bengalese finches learn their more complex song in a similar manner. Finally, once the bird learned the third transition BA, it promptly switches to the target ACB-ACB song, and will never sing ABC again. For example, to transform the song ABC-ABC to ACB-ACB, the bird learns one transition, say CB (and sings ABCB-ABCB for awhile), a few days later it might learn a second transition, say AC. Instead of swapping syllable order or inserting syllables into strings, the birds solved those tasks in a series of steps, gradually approximating the target syntax. We can now ask the bird: can you swap the order of these sounds? Can you insert this syllable into that string? Birds were able to solve these tasks, but never in a single step. We developed an experimental technique for presenting zebra finches with sequence rearrangement tasks: Learning vocal sequences: a comparative study across songbirds and human infants Both birdsong and human language rely on the ability to arrange syllables in new sequences. We propose that the song system is a general-purpose commination system: in the case of calls, it enables plasticity in vocal timing to facilitate social interactions, whereas in the case of songs, plasticity extends to developmental changes in vocal structure. In both females and males, the song system is necessary for predictive call timing and precision. Interestingly, non-singing female zebra finches exhibit better learning than male, when interacting with vocal robots. Using vocal robots, we show that birds can dynamically adjust call timing in anticipation of complex rhythm patterns. The forebrain song system mediates predictive call timing in female and male zebra finches Zebra finches can quickly learn to modify the timing of their innate calls. Co-evolution of sexually dimorphic reinforcement systems can explain the coexistence of gregariousness and monogamy. These findings suggest that song-triggered dopaminergic activation serves a dual function in social songbirds: as low-threshold social reinforcement in males and as ultra-selective sexual reinforcement in females. In females, we observed song reinforcement exclusively to the mate’s song. Behaviorally too, unmated males but not females persistently exchanged mild punishments in return for songs. Surprisingly, in unmated males but not in females, striatal dopamine neurotransmission was elevated after hearing songs. We found that the dopaminergic reward circuitry of zebra finches can simultaneously promote social cohesion and breeding boundaries. Sexual dimorphism in striatal dopaminergic responses promotes monogamy in social songbirds _ Categorical rhythms in thrush nightingales and music are similar Human Social Learning & Culture Lab: We perform large scale experiments in virtual words to study how group of people learn to improve their collective action 2021:Įxperimenting with online governance We developed virtual worlds experiments for studying social feedback Collaborators: Dalton Conley, Nori Jacobi, Seth FreyĢ020: A Rating Method for Improved Accuracy of Customer Evaluations and Cost SavingsĬollaborator: Dalton Conley (Princeton University)Ģ019: In a virtual world experiment we found that costly signaling helped obtain reliable crowd estimates of qualityīalanced imitation and song culture Nature Communications article (2021)
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