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남기춘(Kichun nam),김현정(Hyunjeong Kim),박창수(Changsu Park),황유미(Yumi Whang),김영태(Young-Tae Kim),심현섭(Hyun-Sup Sim) 한국정보과학회 언어공학연구회 2004 한국정보과학회 언어공학연구회 학술발표 논문집 Vol.16 No.1
본 연구는 연결어미가 글 이해와 기억에 미치는 영향을 조사하고, 연결어미의 효과와 글 읽기 능력과는 어떤 관련성이 있는지를 조사하기 위해 실시되었다. 연결어미로는 인과 관계와 부가 관계를 나타내는 연결어미가 사용되었다. 앞뒤에 제시되는 두 문장의 국소적 응집성(Local coherence)을 형성하는데 연결어미가 도움을 준다면, 연결어미가 있는 경우에 문장을 이해하는 속도가 빨라지고 글 내용을 기억하는 데에도 도움을 줄 것으로 예측하였다. 만일에 글 읽기 능력이 연결어미를 적절히 사용할 수 있는 능력에 의해서도 영향을 받는다면, 연결어미의 출현 여부와 읽기 능력 간에 상호작용이 있을 것으로 예측하였다. 실험 1에서는 인과 관계 연결어미를 사용하여 문장 읽기 시간에 연결어미의 출현이 미치는 효과와 문장 회상에 미치는 효과를 조사하였다. 실험 결과, 인과 관계 연결어미는 뒤의 문장을 읽는데 촉진적인 효과를 주었으며, 이런 연결어미의 효과는 읽기 능력에 관계없이 일관된 촉진 효과를 나타냈다. 또한, 연결어미의 출현은 문장의 회상에 도움을 주었으며, 연결어미가 문장 회상에 미치는 효과는 읽기 능력의 상하에 관계 없이 일관되게 나타났다. 실험 2에서는 부가 관계 연결어미가 문장 읽기 시간과 회상에 미치는 효과를 조사하였다. 실험 결과, 부가 관계 연결어미 역시 인과 관계 연결어미와 유사한 형태의 효과를 보였다. 실험 1과 실험 2의 결과는 인과 관계와 부가 관계 연결어미가 앞뒤 문장의 응집성 형성에 긍정적인 영향을 주고, 이런 연결어미의 글 읽기에 대한 효과는 글 읽기 능력에 관계없이 일정하다는 것을 시사한다.
최원일,남기춘,Choi Wonil,Nam Kichun 대한음성학회 2002 말소리 Vol.44 No.-
This study was conducted to examine the effect of word length on auditory word recognition. Word length can be defined by several sublexical units, such as letters, phonemes, syllables, etc. To find out which sublexical units are influential in auditory word recognition, the auditory lexical decision task was used. In Experiment 1, we examined the partial correlation between the speed of reaction time and the number of sublexical units, and in Experiment 2, we executed ANOVA to find out which sublexical length variable was an influential unit. Through these two experiment, we concluded syllable length was the most important variable on auditory word recognition.
어휘접근 과정에서 나타나는 한국인 L2 학습자의 이중언어 음운적 동시활성화 양상
백연지(Baik, Yeonji),남기춘(Kichun Nam) 언어과학회 2020 언어과학연구 Vol.0 No.95
This study explored the likelihood of cross-language co-activation among Korean L2 learners of English when performing a monolingual phoneme monitoring task. The stimulus onset asynchrony (SOA: -2,000ms, +200ms, +400ms) between picture and target phoneme stimuli were manipulated. Results demonstrated that participants responded faster and showed lower error rates when performing the task in L1 compared to L2. Moreover, interference effects were observed in all three SOA-manipulated experiments irrelevant to the language type, which shows the presence of phonological co-activation of the language not- in-use during monolingual task. Stronger L1 interference effect was shown during L2 task, which reflects the difference in the degree of bilingual phonological co-activation. This study suggests that when given a short period of time to access the semantic system which is shared by two languages, phonological information of both languages are co-activated even for non-proficient L2 learners whose languages have different scripts.
음운 현상과 연속 발화에서의 단어 인지 : 종성중화 작용을 중심으로
김선미(Kim Sunmi),남기춘(Nam Kichun) 한국음성학회 2010 말소리와 음성과학 Vol.2 No.2
This study explores whether Koreans exploit their native coda-neutralization process when recognizing words in Korean continuous speech. According to the phonological rules in Korean, coda-neutralization process must come before the liaison process, as long as the latter(i.e. liaison process) occurs between ‘words’, which results in liaison-consonants being coda-neutralized ones such as /b/, /d/, or /g/, rather than non-neutralized ones like /p/, /t/, /k/, /?/, /?/, or /s/. Consequently, if Korean listeners use their native coda-neutralization rules when processing speech input, word recognition will be hampered when non-neutralized consonants precede vowel-initial targets. Word-spotting and word-monitoring tasks were conducted in Experiment 1 and 2, respectively. In both experiments, listeners recognized words faster and more accurately when vowel-initial target words were preceded by coda-neutralized consonants than when preceded by coda non-neutralized ones. The results show that Korean listeners exploit the coda-neutralization process when processing their native spoken language.
강음절이 한국어 화자의 영어 연속 음성의 어휘 분절에 미치는 영향
김선미(Kim, Sunmi),남기춘(Nam, Kichun) 한국음성학회 2013 말소리와 음성과학 Vol.5 No.2
English native listeners have a tendency to treat strong syllables in a speech stream as the potential initial syllables of new words, since the majority of lexical words in English have a word-initial stress. The current study investigates whether Korean (L1) - English (L2) late bilinguals perceive strong syllables in English continuous speech as word onsets, as English native listeners do. In Experiment 1, word-spotting was slower when the word-initial syllable was strong, indicating that Korean listeners do not perceive strong syllables as word onsets. Experiment 2 was conducted in order to avoid any possibilities that the results of Experiment 1 may be due to the strong-initial targets themselves used in Experiment 1 being slower to recognize than the weak-initial targets. We employed the gating paradigm in Experiment 2, and measured the Isolation Point (IP, the point at which participants correctly identify a word without subsequently changing their minds) and the Recognition Point (RP, the point at which participants correctly identify the target with 85% or greater confidence) for the targets excised from the non-words in the two conditions of Experiment 1. Both the mean IPs and the mean RPs were significantly earlier for the strong-initial targets, which means that the results of Experiment 1 reflect the difficulty of segmentation when the initial syllable of words was strong. These results are consistent with Kim & Nam (2011), indicating that strong syllables are not perceived as word onsets for Korean listeners and interfere with lexical segmentation in English running speech.
유창성 실어증 환자의 단어 명명 관련 ERP 소견과 뇌 병변과의 관계
김동휘(Dong-Hwee Kim),남기춘(Kichun Nam),김충명(Choong-Myung Kim) 한국언어치료학회 2007 言語治療硏究 Vol.16 No.1
The present study aims to reveal the relationship between brain lesion and its ERP signature by aphasic patients. Compared to ERP activation of normal controls divided by two groups with age, ERPs specific to anomic and Wernickes aphasia were investigated whether the reading ERPs patterns between them were same or not. During word reading ERPs results were observed to be same between two control groups but its amplitudes and latencies of common component consisted of P200, N400 and P600 showing age effect. These differences ascertained that with age, their components amplitudes and latencies were smaller and later response in favor of speed of processing of Salthouse (1996). The next comparison between Anomic aphasics and normal controls balanced against age were conducted. Their ERPs results were similar on N400 except for the other components such as P200 and P600. Another group of Wernickes aphasics found no components during epochs observed in Anomic aphaics or normal controls. These characteristics of ERPs were likely to suggest that regarding the relationship between brain lesion and its electrophysiological indexes basal ganglia defect common to Anomic aphasics are linked to the decreasing of phonological encoding process and temporo-parietal lesion to the deficit or lowering of all processing stage. Future study will be more to focus on the comparison of topographical activation pattern with regard to fine-grained classified aphasics through multi-channel EEG.