• Annual Conference on Human and Language Technology
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• 2022.10a
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• pp.588-591
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• 2022

최근 자연어 이해 및 생성에 있어서 사전학습 기반의 언어 모델이 널리 사용되고 있다. BERT, roBERTa 등의 모델이 있으며, 마스크 언어 모델링을 주요 과제로 하여 사전 학습을 한다. 하지만 MLM은 문법적인 정보를 활용하지 못하는 단점이 있다. 단 순히 무작위로 마스크를 씌우고 맞추기 때문이다. 따라서 본 연구에서는 입력 문장의 문법적 정보를 활용하는 방법을 소개하고, 이를 기반으로 사후 학습을 하여 그 효과를 확인해 본다. 공개된 사전학습 모델과 사후학습 모델을 한국어를 위한 벤치마크 데이터셋 KLUE에 대하여 조정학습하고 그 결과를 살펴본다.

• The Journal of the Acoustical Society of Korea
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• v.12 no.6
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• pp.21-27
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• 1993

계층형 신경망은 패턴 분류를 위해 사용되어 왔다. 이것은 주어진 교사패턴들의 학습으로 원하는 입력-출력 간의 매핑을 할 수 있기 때문이다. 신경망은 타겟ㅌ트 패턴이 입력 패턴의 카테고리에 일치할 때 타겟트 패턴을 학습하므로서 사후 확률을 근사화할 수 있다. 그리고 입력 공간을 부분 공간으로 나누어 학습 데이터들의 비율로서 만든 타겟트 벡터들로 학습한 신경망은 확률밀도 함수를 나타낼 수 있다. 본 연구에서는 역전파 학습법을 이용한 계층형 NN 과 코드북으로서 사후 확률과 확률밀도함수의 측정방법을 제안하였다. VQ 로 추정한 사후확률고 확률밀도함수를 이용하여 학습이 필요없는 RBF network 의 일종인 PNN으로 모음 인식을 수행 하였다. 인식 실험에서 PNN 의 결과는 역전파 학습법을 이용항 3층 신경망과 VQ 의 평균 인식율과 비교되었다. VQ-PNN의 인식율이 다른 것보다 우수하게 나타났다.

• The Journal of the Korea Contents Association
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• v.22 no.10
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• pp.816-826
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• 2022

The purpose of this study is to examine the effect of improving academic self-efficacy and self-directed learning ability by conducting a self-directed learning program for college students. To this end, a program was conducted for 28 college students. In order to examine the effectiveness of the program, a single-group pre-post design method was used, which compared the pre-score before the program and the post-score after the program. The program was conducted during the 8 session. The research results are as follows. First, the pre-post scores of the academic self-efficacy of the students who participated in the program increased, but it was not statistically significant. Second, the pre-post score of the self-directed learning ability of students who participated in the self-directed learning program increased significantly. Through these results, the implications of the self-directed learning program for college students and suggestions for follow-up research were presented.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2022.10a
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• pp.155-157
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• 2022

기존의 안전교육 교수방법은 강의 방식으로 전달하고 있어 근로자의 참여를 이끌어내는데 한계점이 있으며, 불안전한 행동에 의한 안전사고를 예방하기 위해서는 스마트 체험식 안전교육으로 패러다임을 전환할 필요성이 있다. [연구배경/목적]:스마트 체험식 안전교육은 건설현장에서 근로자들이 보다 더 빠르게 위험을 인지하고 여기에 맞는 안전작업 이행과 위험발생 시 응급대처 능력 등을 향상시키므로 사전사후 학습전이의 효과성을 검정할 수 있다. 이러한 관점에서 안전사고를 예방하기 위한 본 연구는 안전교육의 체험학습방법과 참여방법, 교육콘텐츠 접근방법을 통하여 근로자의 안전행동 유도와 불안전행동 감소에 미치는 영향검증이 목적이다. [연구방향/범위]:실제 건설현장과 동일하게 작업환경을 구성해 놓은 스마트 체험식 안전교육시설에서 추락체험, 낙하물체험, 장비협착체험, 화재, 감전재해 등의 실제 사고를 체험해 볼 수 있도록 만들어진 체험학습 방법과 가상(VR, AR, 메타버스)공간에서 간접경험 할 수 있는 참여방법을 다룰 것이다. 그리고 안전체험교육 사전사후의 분석을 통하여 안전 학습전이 성과를 분석한다. [연구 분석방법]:연구의 주요 변인으로는 Human-Error, 안전행동요인, 불안전행동요인, 위험감수성, 조직특성, 조직의 안전문화, 조직의 역량, 안전교육특성, 교육콘텐츠 변화가 사전사후 분석을 통하여 현장 작업 시 안전 학습전이의 효과성을 검정하였다.

• Journal of The Korean Association For Science Education
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• v.19 no.1
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• pp.91-99
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• 1999

The researches related to students' preconceptions and conceptual change model have been reported that students' learning motivation is one of the key variable for the conceptual change. The effects of students learning motivations on conceptual changes were evaluated. Subjects of this study were 8th grade students. and they were divided into 2 groups. One group was taught by traditional teaching method, and the other group by concept change teaching model. After the intervention, learning motivations of the students were testified. The students of high motivation who were taught by concept change teaching model showed higher scores in the concept of chemical change than the students by traditional teaching method. But there was no difference in both groups of students who have low learning motivations. The learning motivations before the intervention. the motivations stimulated by classes. and the degree of concept understanding showed high correlation. The motivations stimulated by classes explain 23.3 % of the degree of concept understanding. The results seems to mean that students learning motivations contribute to the understanding of concepts. Especially confidence of learning as a subcategory of the learning motivation contributes significantly to the understanding of new concepts. In contrast, the traditional teaching methods and the teaching methods of concept change learning theory were not effective for the stimulation of students learning motivations.

• The Journal of Korean Association of Computer Education
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• v.9 no.5
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• pp.1-11
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• 2006

This study aims at identifying what effect ARCS model based instruction and cognitive style have on learning motivation and achievement in computer education. In order to accomplish this goal. 70 high school students were randomly allocated into the experiment group and the control group. And each group was divided into field-independent group and field-dependent group. The results were as follows. First, post test of learning motivation among four groups showed that mean differences were statistical significant. Especially 'ARCS model based instruction-field independent group got higher score than 'traditional instruction field dependent' group. Second, post test of learning achievement showed no significant mean difference among four group. The result of the pre and post test difference analysis showed that the change scores of means were significantly different.

• Journal of the Korean Chemical Society
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• v.51 no.3
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• pp.279-286
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• 2007

In this study, we investigated the influences of cognitive conflict and situational interest induced by a discrepant event and an alternative hypothesis, attention and state learning strategies on conceptual change. A preconception test was administered to 486 seventh graders. They also completed the questionnaires of cognitive response and situational interest to a discrepant event before/after presenting an alternative hypothesis. After learning the concept of density with a CAI program as conceptual change intervention, the tests of attention, state learning strategies, and conceptual understanding were administered as posttests. Analyses of the results for 197 students having misconceptions about density revealed that post-cognitive conflict was significantly higher than pre-cognitive conflict. However, there was no statistically significant difference between the test scores of pre-situational interest and post-situational interest. Pre-cognitive conflict only exerted a direct effect on post-cognitive conflict, while post-cognitive conflict exerted a direct effect and Journal of the Korean Chemical Society an indirect effect via attention on conceptual understanding. Both pre- and post-situational interests were found to influence on conceptual understanding via attention. Attention had influences positively on deep learning strategy and negatively on surface learning strategy. There was a relatively small effect of state learning strategies on conceptual understanding.

• Proceedings of the Korean Society of Computer Information Conference
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• 2011.06a
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• pp.245-248
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• 2011

본 연구의 목적은 초등 컴퓨터교육에서 디지털마인드맵을 활용한 컴퓨터 수업이 학습자의 학습흥미도와 초인지 향상에 미치는 효과를 알아보기 위한 것이다. 이를 위해 수원시에 소재한 S초등학교 6학년 1개 학급 26명을 실험집단으로 선정하였다. 실험은 매주 1차시 정보재량시간을 이용하여 4차시에 걸쳐서 진행하였으며, 실험 사전 사후에 학습자들의 학습흥미도와 초인지 검사도구를 통하여 조사하였다. 디지털마인드맵을 활용한 수업이 실제로 학습자의 학습흥미도와 초인지 향상에 효과를 미쳤는지를 확인하기 위하여 면담을 통한 질적평가도 실시하였다. 검사도구를 통해 수집된 자료를 가지고 사전-사후 학습흥미도와 초인지의 평균차이가 통계적으로 유의미한지 확인하기 위해 두 종속표본 t검정을 실시하였다. 연구결과, 디지털마인드맵을 활용한 컴퓨터수업은 초등학생의 학습흥미도 향상에 긍정적인 영향을 미치는 것으로 확인되었지만 초인지 향상 면에서 통계적으로 유의미한 차이는 나타나지 않았다. 그러나 면담결과로 미루어 보아 일정부분 초인지 향상에 긍정적인 효과가 있음을 유추해 볼 수 있었다.

• Journal of Digital Convergence
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• v.16 no.2
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• pp.1-7
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• 2018

The current study investigates whether artificially intelligent chatbots influence Korean EFL students' vocabulary learning. For eight weeks, 47 college students in Korea participated in this study. They were divided into two groups: one experimental group and one control group. Participants in the experimental group engaged in chat with a chatbot during the eight-week experimental period. Before and after the experiment, pre- and post-tests were administered to see if their English vocabulary improved. Pre- and post- surveys were also performed to understand how the participants perceived chatbot-assisted vocabulary learning. Results show that the experimental group improved their vocabulary skills as a result of engaging in chat with the chatbot. Also, their perceptions of vocabulary learning positively changed, increasing their motivation, interest, and confidence in English. Given that there have been few empirical studies to investigate the effects of chatbots on vocabulary development, the present study can provide insights on the effectiveness of chatbots.

• Journal of Digital Convergence
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• v.16 no.12
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• pp.87-95
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• 2018

The purpose of this study was to validate the effectiveness of academic motivation improvement program for underachieved students. Participants in the program consisted of 14 sophomores and senior. They were randomly assigned to either the experimental group(n=7) or the control group(n=7). To analysis the effectivness, matched pair t-test and independent t-test. The programs offered 6times. The results are follows. First, for the experimental group that took part in motivation improvement program, there was a increase in self-esteem. But the improvement was not significant. Second, for the experimental group that took part in motivation improvement program, there was a significant decrease in academic amotivation. Third, the experimental group showed a more significant decrease in academic amotivation. Finally, the significance and limitations of this study and suggestions for future research were presented.