Eon‐suk Ko
Biographic Data
| ID | 1463559 |
|---|---|
| NAME | Eon‐suk Ko |
| GIVEN NAMES | Eon‐suk |
| FAMILY NAME | Ko |
| SIGNATURE | KO E S |
| AFFILIATIONS | Chosun University |
| ORCID | 0000-0003-3963-4492 |
| VERIFIED | Yes |
| TOTAL WORKS | 10 |
| TOTAL CITATIONS | 1 |
| AUTHOR COUNT | 10 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2012 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 1 |
Testing the relationship between preferences for infant-directed speech and vocabulary development
From early on, infants show a preference for infant-directed speech (IDS) over adult-directed speech (ADS), and exposure to IDS has been correlated with language outcome measures such as vocabulary. The present multi-laboratory study explores this issue by investigating whether there is a link between early preference for IDS and later vocabulary size. Infants’ preference for IDS was tested as part of the ManyBabies 1 project, and follow-up CDI d…
The dynamics of initiation in caregiver–child conversational interactions
We investigated the dynamics of communicative initiation in infant−caregiver interactions across ages and language abilities. Analyses of 228 Language ENvironment Analysis (LENA) recordings from 141 Korean adult−child dyads (60 girls; aged 7−30 months) replicated the initiator effect reported in North American populations. This effect, demonstrated by longer utterances, more frequent speech, and shorter response times in self-initiated interactio…
Input Properties Shape Word Segmentation Performance Across Child Development
This study investigates how the linguistic properties of child‐directed speech (CDS) change across child development and how these changes affect segmentation performance in computational models. We analyzed a cross‐sectional corpus of Korean CDS directed at 35 children between 6 and 30 months of age, observing developmental changes in several linguistic properties, including the proportion of one‐word utterances, hapax legomena, and monosyllabic…
Phonological Variation in Child-Directed Speech is Modulated by Lexical Frequency
We investigate whether child-directed speech (CDS) contains a higher proportion of canonical pronunciations compared to adult-directed speech (ADS), focusing on Korean noun stem-final obstruent variation. In a word-teaching task, we observed that mothers use a higher rate of canonical pronunciation when addressing infants than when addressing adults. In a follow-up experiment, adults exhibited a higher rate of canonical pronunciation for high- th…
The Alignment Between Language Properties and Computational Algorithms Enhances Statistical Word Segmentation
This study investigates whether child-directed speech (CDS) exhibits enhanced segmentability compared to adult-directed speech (ADS) and explores how specific linguistic properties of each register influence computational word segmentation performance in Korean. Employing a speaker-matched corpus of naturalistic Korean CDS and ADS, we observed that Korean CDS features shorter utterances and words, lower lexical diversity, fewer hapax legomena and…
Validation of an open source, remote web‐based eye‐tracking method (WebGazer) for research in early childhood
Measuring eye movements remotely via the participant's webcam promises to be an attractive methodological addition to in‐person eye‐tracking in the lab. However, there is a lack of systematic research comparing remote web‐based eye‐tracking with in‐lab eye‐tracking in young children. We report a multi‐lab study that compared these two measures in an anticipatory looking task with toddlers using WebGazer.js and jsPsych. Results of our remotely tes…
Mothers' use of touch across infants' development and its implications for word learning
Caregivers' touches that occur alongside words and utterances could aid in the detection of word/utterance boundaries and the mapping of word forms to word meanings. We examined changes in caregivers' use of touches with their speech directed to infants using a multimodal cross‐sectional corpus of 35 Korean mother‐child dyads across three age groups of infants (8, 14, and 27 months). We tested the hypothesis that caregivers' frequency and use of …
Entrainment of prosody in the interaction of mothers with their young children
Caregiver speech is not a static collection of utterances, but occurs in conversational exchanges , in which caregiver and child dynamically influence each other's speech. We investigate (a) whether children and caregivers modulate the prosody of their speech as a function of their interlocutor's speech, and (b) the influence of the initiator of the conversation on durational characteristics of the exchange. We analyzed naturalistic conversations…
A metrical theory of Korean word prosody
The location or even the existence of stress in Korean has been controversial. At the same time, it has been widely assumed that Korean has phonemically long vowels, allowed in the phrase-initial position. This article considers these two key issues of Korean word-level prosody anew. I claim that the long vowel in Chonnam and Traditional Seoul dialect is an acoustic manifestation of the metrical head, and show that an analysis based on accent rat…
Nonlinear development of speaking rate in child-directed speech
Nonlinear development of speaking rate in child-directed speech
A metrical theory of Korean word prosody
The location or even the existence of stress in Korean has been controversial. At the same time, it has been widely assumed that Korean has phonemically long vowels, allowed in the phrase-initial position. This article considers these two key issues of Korean word-level prosody anew. I claim that the long vowel in Chonnam and Traditional Seoul dialect is an acoustic manifestation of the metrical head, and show that an analysis based on accent rat…
Entrainment of prosody in the interaction of mothers with their young children
Caregiver speech is not a static collection of utterances, but occurs in conversational exchanges , in which caregiver and child dynamically influence each other's speech. We investigate (a) whether children and caregivers modulate the prosody of their speech as a function of their interlocutor's speech, and (b) the influence of the initiator of the conversation on durational characteristics of the exchange. We analyzed naturalistic conversations…
Mothers' use of touch across infants' development and its implications for word learning
Caregivers' touches that occur alongside words and utterances could aid in the detection of word/utterance boundaries and the mapping of word forms to word meanings. We examined changes in caregivers' use of touches with their speech directed to infants using a multimodal cross‐sectional corpus of 35 Korean mother‐child dyads across three age groups of infants (8, 14, and 27 months). We tested the hypothesis that caregivers' frequency and use of …
Phonological Variation in Child-Directed Speech is Modulated by Lexical Frequency
We investigate whether child-directed speech (CDS) contains a higher proportion of canonical pronunciations compared to adult-directed speech (ADS), focusing on Korean noun stem-final obstruent variation. In a word-teaching task, we observed that mothers use a higher rate of canonical pronunciation when addressing infants than when addressing adults. In a follow-up experiment, adults exhibited a higher rate of canonical pronunciation for high- th…
The Alignment Between Language Properties and Computational Algorithms Enhances Statistical Word Segmentation
This study investigates whether child-directed speech (CDS) exhibits enhanced segmentability compared to adult-directed speech (ADS) and explores how specific linguistic properties of each register influence computational word segmentation performance in Korean. Employing a speaker-matched corpus of naturalistic Korean CDS and ADS, we observed that Korean CDS features shorter utterances and words, lower lexical diversity, fewer hapax legomena and…
Validation of an open source, remote web‐based eye‐tracking method (WebGazer) for research in early childhood
Measuring eye movements remotely via the participant's webcam promises to be an attractive methodological addition to in‐person eye‐tracking in the lab. However, there is a lack of systematic research comparing remote web‐based eye‐tracking with in‐lab eye‐tracking in young children. We report a multi‐lab study that compared these two measures in an anticipatory looking task with toddlers using WebGazer.js and jsPsych. Results of our remotely tes…
Testing the relationship between preferences for infant-directed speech and vocabulary development
From early on, infants show a preference for infant-directed speech (IDS) over adult-directed speech (ADS), and exposure to IDS has been correlated with language outcome measures such as vocabulary. The present multi-laboratory study explores this issue by investigating whether there is a link between early preference for IDS and later vocabulary size. Infants’ preference for IDS was tested as part of the ManyBabies 1 project, and follow-up CDI d…
The dynamics of initiation in caregiver–child conversational interactions
We investigated the dynamics of communicative initiation in infant−caregiver interactions across ages and language abilities. Analyses of 228 Language ENvironment Analysis (LENA) recordings from 141 Korean adult−child dyads (60 girls; aged 7−30 months) replicated the initiator effect reported in North American populations. This effect, demonstrated by longer utterances, more frequent speech, and shorter response times in self-initiated interactio…
Input Properties Shape Word Segmentation Performance Across Child Development
This study investigates how the linguistic properties of child‐directed speech (CDS) change across child development and how these changes affect segmentation performance in computational models. We analyzed a cross‐sectional corpus of Korean CDS directed at 35 children between 6 and 30 months of age, observing developmental changes in several linguistic properties, including the proportion of one‐word utterances, hapax legomena, and monosyllabic…
Psychology (9 works) · Linguistics (8 works) · Language Development and Disorders (7 works) · Phonetics and Phonology Research (5 works) · Speech and dialogue systems (5 works) · Child and Animal Learning Development (4 works) · Developmental psychology (4 works) · Cognitive psychology (3 works) · Computer Science (3 works) · Language development (3 works)