• Korean Journal of Cognitive Science
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• v.24 no.4
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• pp.339-363
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• 2013

The age of acquisition effect is the phenomenon in which the words acquired early in life are processed better than the words acquired later in life. Age of acquisition and word frequency are critical factors in lexical processing. In this study we examined the age of acquisition effects in Hangul word recognition. In Experiment 1, we examined the AoA effects in word naming and lexical decision tasks. The results showed that there was an interaction between task and age of acquisition. The AoA effects appeared only in the lexical decision task. In Experiment 2, we examined the relationship between age of acquisition and word frequency in the lexical decision task. The results showed that the two variables were significant. The early-acquired words were processed better than the words acquired later, and the words with high frequency were processed better than the words with low frequency. However, there was no interaction between the two variables. In Experiment 3, we examined how phonological changes in Hangul words influence the AoA effects. The results show that the AoA effects were similar whether phonological changes occur or not. Our results are discussed in terms of several theoretical hypotheses.

• Journal of dental hygiene science
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• v.9 no.5
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• pp.587-592
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• 2009

The purpose of this study was to examine the importance of information sources for the choice of dental institution among consumers of dental service and the relationship between their demographic characteristics and information search pattern. And it's found that those who intended to use a dental institution were active in information search through human resources, and that the Internet was utilized as an additional means of information acquisition. Medical service suppliers should direct their energy into providing information in a diverse and efficient manner in order to address the buying needs of medical consumers and expedite their choice.

• Korea Trade Review
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• v.42 no.3
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• pp.49-74
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• 2017

Drawing on the organizational learning theory, we argue that international patenting allows firms to assess the potential value of their innovation in host countries and find out latent local competitors. The information obtained from international patenting enables firms to make refined innovations that facilitate export performance. However, structural inertia and old knowledge can impede learning from international patenting. Thus, we expect larger firms and older firms to display greater reluctance to use the knowledge obtained from international patenting. Our empirical analysis of Korean pharmaceutical companies from 1998 to 2010 shows that international patent application increases export intensity but firm size and age weaken the positive effect of international patenting on export performance.

• Korean Journal of Cognitive Science
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• v.24 no.3
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• pp.203-235
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• 2013

The goal of this paper is to test the findings about English-speaking children's acquisition of inflectional morphemes in the literature using a large-scale database. For this, we obtained a 4.7-million-word corpus from the CHILDES (Child Language Data Exchange System) database, and analyzed 1,630 British and American children's uses of English derivational morphemes up to age 7. We analyzed the type and token frequencies, type per token ratio (TTR), and the lexical diversity (D) for such inflectional morphemes as the present progressive -ing, the past tense -(e)d, the comparative and superlative -er/est with reference to children's nationality and age groups. To sum up our findings, the correlations between the D value and children's age varied from morpheme to morpheme; e.g. we found no correlation for -ing, a marginal correlation for -ed, and a strong correlation for -er/-est. Our findings are consistent with Brown's (1973) classical observation that children learn progressive forms earlier than the past tense marker. In addition, overgeneralization errors were frequently found for -ed, but rarely for -ing, showing a U-shaped developmental pattern at ages 2-3. Finally, American children showed higher D scores than British children, which showed that American children used inflectional morphemes for more word types compared with British children. The present study has its significance in testing the earlier findings in the literature by setting up well-defined methodology for analyzing the entire CHILDES database.

• The Journal of the Korea Contents Association
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• v.15 no.8
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• pp.424-433
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• 2015

This study tried to investigate the differences between auditory preferences for a discrimination study of minimal pairs with the different onset and the same nucleus of a syllable on the basis of articulator-distance in case of Korean infants and toddlers. As a result we found a main effect for articulator-distance and age but not an effect according to the types of phonation especially in terms of tense. Former results are line with the previous studies having reported the order of consonants acquisition based on the places of articulation suggesting that more sensitive responses for the contiguous and different phonemes may lead earlier acquisition for the same place of articulation of the speech sounds. Specifically, bilabial soudns are followed by alveolar and palatal sounds in order. The latter results also showed that tense consonants got a high rate of recognition beside lax consonants according to the age and sex.

• Journal of the Korea Convergence Society
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• v.8 no.6
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• pp.97-107
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• 2017

The purpose of this study was to investigate information source of the choice of select dental medical institution and the relationship between socioeconomic characteristics and information searching pattern. This study was conducted for residents adults and teens living in Gwangju and rural communities of Jellanam-do province including. The study shows that 61.0 % of the information of selecting dental medical institutes had been introduced by the acquaintance and the rest of the information(37.0%) had been gotten from the internet. The purpose of this study is to develop an information search method that can influence the choice of medical consumers in dental clinics, and to establish a new dental clinic management strategy based on this research. Plus, we want to develop an information search source that can have a convergence effect on the selection of medical consumers in dental medical institutions.

• Speech Sciences
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• v.12 no.2
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• pp.139-149
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• 2005

The purpose of this study was to propose a preliminary norm for 'Korean-Test of Articulation for Children(K-TAC)'. The K-TAC was designed to test 19 Korean consonants in various phonetic contexts through 37 words. We collected the data of 220 normally developing children aged 2;6(years;months) to 6;5. We analyzed the mean percentage of consonants correct and the age of acquisition for K-TAC. The results were as follows: first, The mean percentage was over 60% at late 2 years of age, over 80% at th age of 3, and over 90% after the age of 4. There were significant differences among age groups. Second, based on the criterion of correct production by 75% of children, Korean children acquired stops and nasals except for SF velars, glottal fricative, SF liquid and affricates by late 2 or 3 years of age. After that they acquired SF velars at the age of 4 and SI liquid at the age of 5. However, they could not acquire alveolar fricatives by the age of late 6. Third, if the distorted sounds were scored as correct, they acquired SI liquid at 4 years of age and alveolar fricatives at 5 years of age.

• Korean Journal of Child Education & Care
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• v.17 no.3
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• pp.83-110
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• 2017

The purpose of this study was to examine the moderating effects of mothers' beliefs about emotional guidance on the relations between children's emotionality and parenting stress. The participants were 213 mothers of 3~5 year old children from early childhood educational institutions located in Gyeonggi province and Daejeon, Korea. Mothers completed questionnaires regarding children's emotionality, beliefs about emotional guidance and parenting stress. The main results of this study are as follows. First, children's gender, age and mothers' age was related to parenting stress. And maternal parenting stress was positively related to children's negative emotionality and mothers' beliefs that children learn emotion by themselves and negatively related to beliefs that parent should coach children's emotion. Also, the relations between negative emotionality of children and parenting stress were significantly moderated by mothers' beliefs about emotional guidance. That is, higher levels of children's negative emotionality predicted higher parenting stress especially for mothers who believe that children learn emotion by themselves. The findings of this study suggested the importance of mothers' emotion related beliefs to reduce parenting stress.

• The Journal of the Korea Contents Association
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• v.19 no.3
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• pp.138-154
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• 2019

This study was conducted to identify the use motivations of AI speaker and examine the characteristics of AI speaker users. Based on the uses and gratifications theory, The study results show that the user motivations of AI speaker are four dimensional, namely escaping from daily problems and maintaining social relationships, information acquisition and learning, entertainment and relaxation and pursuit of practicability. The main AI speaker users are in their 30s, and they are innovative to actively use AI speakers for entertainment purposes such as listening to music. The four sub-dimensions differed as we compared them with user characteristics. Specifically, the motivation for escaping from daily problems and maintaining social relationships varied with gender and age. Moreover, age and informativeness were identified to have an influence on the motivations of information acquisition and learning and entertainment and relaxation. In sum, this research provides practical implications into how to strategically create contents and services for AI speakers.

• Journal of the Korea Convergence Society
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• v.11 no.5
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• pp.183-189
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• 2020

This study was carried out to find out the acquisition effect by measurement periods of adult learners learning through English pattern practice. The subjects of this study were divided into adult learner groups including the learners in their 40s and those who were over 65 and the child group who were 8 years old as a comparative group. After the subjects had a pre-test at first, person agreement and tense were instructed though English pattern practice and right after that, they had a post-test. Then 4 weeks later, they had a delayed test. As a result, the acquisition result of adult learners learning though English pattern practice showed the largest rise by those in their 40s and the learners of those over 65. However the adult learners aged over 65 showed the largest drop in delayed test of the reading comprehension. Based on these results, it is necessary to develop teaching method for adult learners in consideration of their characters and weak points.