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Skewing the evidence: The effect of input structure on child and adult learning of lexically based patterns in an artificial language

Publication date: August 2017 Source:Journal of Memory and Language, Volume 95 Author(s): Elizabeth Wonnacott, Helen Brown, Kate Nation Successful language acquisition requires both generalization and lexically based learning. Previous research suggests that this is achieved, at least in part, by tracking distributional statistics at and above the level of lexical items. We explored this learning using a semi-artificial language learning paradigm with 6-year-olds and adults, looking at learning of co-occurrence relationships between (meaningless) particles and English nouns. Both age groups showed stronger lexical learning (and less generalization) given “skewed” languages where a majority particle co-occurred with most nouns. In addition, adults, but not children, were affected by overall lexicality, showing weaker lexical learning (more generalization) when some input nouns were seen to alternate (i.e. occur with both particles). The results suggest that restricting generalization is affected by distributional statistics above the level of words/bigrams. Findings are discussed within the framework offered by models capturing generalization as rational inference, namely hierarchical-Bayesian and simplicity-based models.
Source: Journal of Memory and Language - Category: Speech-Language Pathology Source Type: research

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