The role of morphology in phoneme prediction: Evidence from MEG  

Oleh:

Ettinger, Allyson ; Linzen, Tal ; Marantz, Alec

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Brain and Language (Full Text) vol. 129 (2014), page 14-23.
Topik: MEG Spoken word recognition Prediction Morphology Surprisal Entropy
Fulltext: 129_Ettinger.pdf (1.14MB)

Isi artikel

There is substantial neural evidence for the role of morphology (word-internal structure) in visual word recognition. We extend this work to auditory word recognition, drawing on recent evidence that phoneme prediction is central to this process. In a magnetoencephalography (MEG) study, we crossed morphological complexity (bruis-er vs. bourbon) with the predictability of the word ending (bourbon vs. burble). High prediction error (surprisal) led to increased auditory cortex activity. This effect was enhanced for morphologically complex words. Additionally, we calculated for each time point the surprisal corresponding to the phoneme perceived at that time point, as well as the cohort entropy, which quantifies the competition among words compatible with the string prefix up to that time point. Higher surprisal increased neural activity at the end of the word, and higher entropy decreased neural activity shortly after word onset. These results reinforce the role of morphology and phoneme prediction in spoken word recognition.

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