Abstract
The hypothesis that known words can serve as anchors for discovering new words in connected speech has computational and empirical support. However, evidence for how the bootstrapping effect of known words interacts with other mechanisms of lexical acquisition, such as statistical learning, is incomplete. In 3 experiments, we investigated the consequences of introducing a known word in an artificial language with no segmentation cues other than cross-syllable transitional probabilities. We started with an artificial language containing 4 trisyllabic novel words and observed standard above-chance performance in a subsequent recognition memory task. We then replaced 1 of the 4 novel words with a real word (tomorrow) and noted improved segmentation of the other 3 novel words. This improvement was maintained when the real word was a different length to the novel words (philosophy), ruling out an explanation based on metrical expectation. The improvement was also maintained when the word was added to the 4 original novel words rather than replacing 1 of them. Together, these results show that known words in an otherwise meaningless stream serve as anchors for discovering new words. In interpreting the results, we contrast a mechanism where the lexical boost is merely the consequence of attending to the edges of known words, with a mechanism where known words enhance sensitivity to transitional probabilities more generally.
DOI
10.1037/xlm0000567
Publication Date
2018-06-28
Publication Title
Journal of Experimental Psychology: Learning, Memory, and Cognition
Publisher
American Psychological Association
ISSN
0278-7393
Embargo Period
2024-11-22
Recommended Citation
Palmer, S., Hudson, J., White, L., & Mattys, S. (2018) 'Lexical knowledge boosts statistically-driven speech segmentation', Journal of Experimental Psychology: Learning, Memory, and Cognition, . American Psychological Association: Available at: https://doi.org/10.1037/xlm0000567
