Journal
CURRENT BIOLOGY
Volume 28, Issue 7, Pages 1132-+Publisher
CELL PRESS
DOI: 10.1016/j.cub.2018.02.042
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Funding
- European Research Council [337822]
- Economic and Social Research Council studentship [ES/J500173/1]
- European Research Council (ERC) [337822] Funding Source: European Research Council (ERC)
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When we encounter a new word, there are often multiple objects that the word might refer to [1]. Nonetheless, because names for concrete nouns are constant, we are able to learn them across successive encounters [2, 3]. This form of cross-situational'' learning may result from either associative mechanisms that gradually accumulate evidence for each word-object association [4, 5] or rapid proposebut-verify (PbV) mechanisms where only one hypothesized referent is stored for each word, which is either subsequently verified or rejected [6, 7]. Using model-based representation similarity analyses of fMRI data acquired during learning, we find evidence for learning mediated by a PbV mechanism. This learning may be underpinned by rapid pattern-separation processes in the hippocampus. Our findings shed light on the psychological and neural processes that support word learning, suggesting that adults rely on their episodic memory to track a limited number of word-object associations.
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