This paper presents our submission to the SIGMORPHON 2023 task 2 of Cognitively Plausible Morphop... more This paper presents our submission to the SIGMORPHON 2023 task 2 of Cognitively Plausible Morphophonological Generalization in Korean. We implemented both Linear Discriminative Learning and Transformer models and found that the Linear Discriminative Learning model trained on a combination of corpus and experimental data showed the best performance with the overall accuracy of around 83%. We found that the best model must be trained onboth corpus data and the experimental data of one particular participant. Our examination of speaker-variability and speaker-specific information did not explain why a particular participant combined well with the corpus data.We recommend Linear Discriminative Learning models as a future non-neural baseline system, owning to its training speed, accuracy, model interpretability and cognitive plausibility. In order to improve the model performance, we suggest using bigger data and/or performing data augmentation and incorporating speaker and item-specific...
As is known, the fundamental frequencies (F0) of the vowels following aspirated or lenis stops ha... more As is known, the fundamental frequencies (F0) of the vowels following aspirated or lenis stops have become associated with the aspirated~lenis stop contrast while Voice Onset Time (VOT) values of them became merged in Seoul Korean. Previous studies found the effects of age, gender, lexical frequency, and vowel height. However, although lexical competition has been demonstrated to affect the trajectory of sound change regarding contrastivity, it has not been considered in this context. The present study examines the effects of lexical competition on this sound change. Through a production experiment, analyses demonstrate that the aspirated~lenis contrast is hyperarticulated in minimal pairs for both VOT and F0, but only in aspirated stops with following high vowels. Moreover, speakers advanced in the sound change produce lower F0 values for lenis stops with following non-high vowels if an aspirated competitor exists. We find that the F0 distinction in lenis stops is more hyperarticul...
Studies in Phonetics, Phonology, and Morphology, 2017
This paper investigates the gradient aspect of flapping in American English, considering both the... more This paper investigates the gradient aspect of flapping in American English, considering both the language internal factors stress and morphological complexity and the language external factor lexical frequency. To reflect the gradient aspect of flapping, flapping rates were regarded as dependent variables, and a statistical analysis was conducted with both language-internal and language-external factors. Due to the range of dependent variables [0, 1], a zero/one inflated beta regression was conducted. The results verified that the more frequent a carrier word containing a word-medial /t/ is, the more likely it is for the word-medial /t/ to be realized as a flap, and that the wordmedial /t/ in a morphologically simple word is more likely to be realized as a flap than one in a morphologically complex word. Thereafter, Noisy Harmonic Grammar analyses were performed, and the extended version showed an improvement over the original model of 83.228%.
This paper presents our submission to the SIGMORPHON 2023 task 2 of Cognitively Plausible Morphop... more This paper presents our submission to the SIGMORPHON 2023 task 2 of Cognitively Plausible Morphophonological Generalization in Korean. We implemented both Linear Discriminative Learning and Transformer models and found that the Linear Discriminative Learning model trained on a combination of corpus and experimental data showed the best performance with the overall accuracy of around 83%. We found that the best model must be trained onboth corpus data and the experimental data of one particular participant. Our examination of speaker-variability and speaker-specific information did not explain why a particular participant combined well with the corpus data.We recommend Linear Discriminative Learning models as a future non-neural baseline system, owning to its training speed, accuracy, model interpretability and cognitive plausibility. In order to improve the model performance, we suggest using bigger data and/or performing data augmentation and incorporating speaker and item-specific...
As is known, the fundamental frequencies (F0) of the vowels following aspirated or lenis stops ha... more As is known, the fundamental frequencies (F0) of the vowels following aspirated or lenis stops have become associated with the aspirated~lenis stop contrast while Voice Onset Time (VOT) values of them became merged in Seoul Korean. Previous studies found the effects of age, gender, lexical frequency, and vowel height. However, although lexical competition has been demonstrated to affect the trajectory of sound change regarding contrastivity, it has not been considered in this context. The present study examines the effects of lexical competition on this sound change. Through a production experiment, analyses demonstrate that the aspirated~lenis contrast is hyperarticulated in minimal pairs for both VOT and F0, but only in aspirated stops with following high vowels. Moreover, speakers advanced in the sound change produce lower F0 values for lenis stops with following non-high vowels if an aspirated competitor exists. We find that the F0 distinction in lenis stops is more hyperarticul...
Studies in Phonetics, Phonology, and Morphology, 2017
This paper investigates the gradient aspect of flapping in American English, considering both the... more This paper investigates the gradient aspect of flapping in American English, considering both the language internal factors stress and morphological complexity and the language external factor lexical frequency. To reflect the gradient aspect of flapping, flapping rates were regarded as dependent variables, and a statistical analysis was conducted with both language-internal and language-external factors. Due to the range of dependent variables [0, 1], a zero/one inflated beta regression was conducted. The results verified that the more frequent a carrier word containing a word-medial /t/ is, the more likely it is for the word-medial /t/ to be realized as a flap, and that the wordmedial /t/ in a morphologically simple word is more likely to be realized as a flap than one in a morphologically complex word. Thereafter, Noisy Harmonic Grammar analyses were performed, and the extended version showed an improvement over the original model of 83.228%.
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