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Production of Supra-regular Spatial Sequences by Macaque Monkeys.


ABSTRACT: Understanding and producing embedded sequences in language, music, or mathematics, is a central characteristic of our species. These domains are hypothesized to involve a human-specific competence for supra-regular grammars, which can generate embedded sequences that go beyond the regular sequences engendered by finite-state automata. However, is this capacity truly unique to humans? Using a production task, we show that macaque monkeys can be trained to produce time-symmetrical embedded spatial sequences whose formal description requires supra-regular grammars or, equivalently, a push-down stack automaton. Monkeys spontaneously generalized the learned grammar to novel sequences, including longer ones, and could generate hierarchical sequences formed by an embedding of two levels of abstract rules. Compared to monkeys, however, preschool children learned the grammars much faster using a chunking strategy. While supra-regular grammars are accessible to nonhuman primates through extensive training, human uniqueness may lie in the speed and learning strategy with which they are acquired.

SUBMITTER: Jiang X 

PROVIDER: S-EPMC6606444 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature

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Production of Supra-regular Spatial Sequences by Macaque Monkeys.

Jiang Xinjian X   Long Tenghai T   Cao Weicong W   Li Junru J   Dehaene Stanislas S   Wang Liping L  

Current biology : CB 20180607 12


Understanding and producing embedded sequences in language, music, or mathematics, is a central characteristic of our species. These domains are hypothesized to involve a human-specific competence for supra-regular grammars, which can generate embedded sequences that go beyond the regular sequences engendered by finite-state automata. However, is this capacity truly unique to humans? Using a production task, we show that macaque monkeys can be trained to produce time-symmetrical embedded spatial  ...[more]

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