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소득집단별 청소년의 스마트폰 의존에 관한 의사결정나무모형 분석
서유경 ( Seo¸ Yu Kyung ),김현옥 ( Kim¸ Hyun Ok ) 한국청소년복지학회 2021 청소년복지연구 Vol.23 No.3
본 연구는 소득집단별 청소년의 스마트폰 의존에 관한 의사결정나무모형 분석을 실시하여 스마트폰 의존에 대한 두 집단의 가지경로의 차이를 밝히는데 있다. 이를 위해 한국청소년정책연구원에서 수행한 한국아동·청소년패널조사 2018(Korean Children and Youth Panel Survey 2018, KCYPS 2018)자료를 활용하였고, 자료분석은 R 3-6-2와 jamovi를 사용하여 T-test와 의사결정나무 분석(Data Mining Decision Tree Analysis)을 실시하였다. 분석결과, 첫째, 소득집단별 스마트폰 의존 예측요인은 청소년 변인에서 주의력결핍, 공격성, 사회적위축, 우울, 학업열의, 학업무기력이 유의미하였고, 부모 변인으로는 삶의 만족도, 행복감이 유의미하였다. 둘째, 스마트폰 의존에 관한 의사결정나무 모형 분석 결과, 고소득 집단은 공격성과 주의력결핍 및 우울이 결합하여 높은 스마트폰 의존을 보였다. 저소득 집단은 우울과 주의력결핍, 공격성 외에 학업무기력이 결합될 때 높은 스마트폰 의존을 보였다. 이를 바탕으로 논의 및 추후 연구를 제시하였다. The purpose of this study is to examine the polar income adolescents in regard to smartphone dependence by conducting a decision tree model analysis. The Korean Children and Youth Panel Survey 2018 (KCYPS 2018) was analyzed using Jamovi and R.64 3-6-2/R-studio. First, Significant differences in youth predictors, attention deficit, aggression, social withdrawal, depression, academic engagement and academic helplessness were analyzed between groups and Significant differences in parents predictors, life satisfactin, happiness were analyzed. Second, the analysis of the decision tree model on the high-income is related to aggression, attention deficit, and depression. And, the analysis of the decision tree model on the low-income is related to academic helplessness, depression, attention deficit and aggression. Based on these results, discussions and further study were suggested.
Yukyung Jung,Jae Ho Han,Hyo Jung Choi,Jae Hee Lee 한국청각언어재활학회 2022 Audiology and Speech Research Vol.18 No.4
Purpose: The aim of this study was to examine test-retest reliability and validity of the adaptive Korean matrix sentence-in-noise test for elderly group with normal hearing (ENH) and elderly group with hearing impairment (EHI). Methods: Twenty ENH listeners and 20 EHI listeners based on the World Health Organization (WHO)-proposed hearing-impairment grade participated. For the test-retest reliability of the Korean matrix sentence-in-noise test, each subject was assessed twice in a 2-week interval using three types of noise: speech-shaped noise, International Collegium of Rehabilitative Audiology noise, and International Speech Test Signal. The test-retest agreement was judged by the intraclass correlation coefficient (ICC) and Bland-Altman plots. To differentiate between real change and random measurement error, the standard error of measurement (SEM) and the minimal detectable change (MDC) were also obtained as another reliability index. For the concurrent validity, the results of the Matrix test were compared to the results of the Korean-version Hearing In Noise Test (K-HINT). Results: The test-retest reliability was good to excellent for ENH and EHI groups (ICC, 0.84~0.98). Both groups showed stable reliability, but the ENH group showed smaller SEM and MDC values than the EHI group. No systematic errors were found from the Bland- Altman plots. The correlation between the results of the Matrix test and the K-HINT test was high, revealing good concurrent validity. Conclusion: The Korean matrix sentence-in-noise test appeared to be valid and reliable for the elderly. The Korean matrix sentence-in-noise test can be utilized for clinical measurement of the speech-in-noise ability of elderly individuals.
Yukyung Park(박유경),Youngsoo Song(송영수) 중앙대학교 한국인적자원개발전략연구소 2010 역량개발학습연구 Vol.5 No.4
본 연구는 조직구성원의 셀프리더십 전략이 학습조직 구축에 미치는 영향과 셀프리더십과 학습조직의 관계에서 자기효능감의 매개효과를 분석하였다. 국내 5개의 기업에서 총 211명의 설문응답을 표본으로 회귀분석을 실시하였다. 연구결과, 조직구성원의 셀프리더십 전략은 학습조직의 사람영역과 구조영역 모두에 정(+)의 유의한 영향을 미쳤으며, 자기효능감은 셀프리더십과 학습조직의 사람영역에서 부분 매개효과를 보이는 것으로 나타났다. 이는 조직구성원의 셀프리더십 수준이 높을수록, 학습조직 구축의 정도가 높다는 것을 의미할 뿐만 아니라, 자기효능감을 통해 셀프리더십 전략이 학습조직 구축에 기여한다고 볼 수 있다. 본 연구의 결과는 학습조직에서 조직구성원의 내적동기가 조직구성원뿐만 아니라 조직의 시스템에도 영향을 미치고 있음을 시사하고 있다. 따라서 HRD 실무자들이 조직이나 교육 과정 개발 시, 조직구성원의 내적동기를 활용함으로써 지식창출과 공유를 통한 성과향상을 기대할 수 있을 것이다. The purpose of this study is to investigate the effect of employees` self-leadership strategies on building a learning organization and the mediating effect of self-efficacy on the relationship between self-leadership and learning organization. The results, based on a regression analysis of 211 employees, revealed that employees` self-leadership strategies had a positive effect on building a learning organization and self-efficacy partially mediated the relationship between self-leadership and learning organization. The findings highlight the fact that consideration of self-leadership ability and self-efficacy is a promising addition to building a learning organization and organizational development. Human resource development and organization development specialists can support self-leadership and self-efficacy in employees` performance levels by introducing the relevant practices.
Yukyung Choi,Heeyoung Lee,Soomin Lee,Sejeong Kim,Jeeyeon Lee,Jimyeong Ha,Hyemin Oh,Yohan Yoon 한국축산식품학회 2017 한국축산식품학회지 Vol.37 No.6
In the present study, centrifugation and filtration pretreatments were evaluated to decrease sample preparation time and to improve the sensitivity and specificity of multiplex polymerase chain reaction (PCR) for the detection of low levels of pathogenic Escherichia coli in various foods. Pathogenic E. coli (E. coli NCCP11142, E. coli NCCP14037, E. coli NCCP 14038, E. coli NCCP14039, and E. coli NCCP15661) was inoculated into pork, beef, and baby leafy vegetables at 1, 2, and 3 Log CFU/g. The samples were shaken 30 times (control), then centrifuged or filtered. DNA extracts from the samples were subjected to PCR using the PowerchekTM Diarrheal E. coli 8-plex Detection Kit. In the pork samples, no E. coli was detected in the control samples, while E. coli were detected in 100% of 3-Log CFU/g inoculated and centrifuged samples, and in 100% of 2 and 3-Log CFU/g inoculated, and filtered samples. In the beef samples, all control samples appeared to be E. coli-negative, while E. coli was detected in 50-75% of centrifuged samples, regardless of inoculated level, and in 100% of 2 and 3-Log CFU/g inoculated, and filtered samples. In baby leafy vegetables, E. coli were not detected in 25-50% of the control samples, while E. coli were detected in 0-25% of the centrifuged samples, and 75-100% of the filtered samples, depending on the inoculum amount. In conclusion, filtration pretreatment can be used to minimize sample preparation time, and improve the sensitivity and specificity of rapid detection of pathogenic E. coli in various foods.