• Journal of The Korean Association For Science Education
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• v.25 no.2
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• pp.173-183
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• 2005

In this study, we questioned what assessment types and scoring methods of science performance assessment(SPA) were being used in middle and high school, and how much these SPA scores were reliable(generalizable). To answer these questions, SPA data obtained from the seven schools were classified according to assessment type and scoring method. Based upon this classification, we analyzed the reliability by applying generalizability theory. The result, from the classification of assessment type and scoring method, showed that SPA types of the seven schools were divided into two types: paper-pencil type and task type. Paper-pencil type included answer(content)-restricted essay-type test solely. Task type has two parts: process and outcome assessment. As the results of analyzing scoring methods of the seven schools, there were two cases in the way of scoring methods: one case is scoring all essay-type items and performance tasks by one teacher, the other is scoring assigned performance tasks by two teachers. But the case of scoring assigned essay-type items or the case of cross scoring by two or more teachers were not found. The findings of the reliability analysis are as follows: (1) Effect of essay-type item to SPA score was larger than that of performance task. (2) There was remarkable difference among the seven schools' interaction effect of person and rater in scoring performance tasks. (3) Most of generalizability(reliability) coefficients of SPA for the seven schools were smaller than the acceptable generalizability coefficient(0.80). Therefore, the population of statistical parameters such as number of item, task and rater, should be increased for approaching the acceptable generalizability level.

• Journal of Elementary Mathematics Education in Korea
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• v.20 no.1
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• pp.71-104
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• 2016

The aim of this study is to look into the didactical background for teaching percent in elementary school mathematics and offer suggestions to improve teaching percent in the future. In order to attain these purposes, this study examined key ideas with respect to the didactical background on teaching percent through a theoretical consideration regarding various studies on percent. Based on such examination, this study compared and analyzed textbooks used in the United States, the United Kingdom, and South Korea. In the light of such theoretical consideration and analytical results, this study provided suggestions for improving teaching percent in elementary schools in Korea as follows: giving much weight on percent, emphasizing the concept of percent as a ratio, underlining the various kinds of change problems, emphasizing informal strategies of students before teaching the percent formula, and utilizing various models actively.

• The Journal of the Korea Contents Association
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• v.15 no.10
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• pp.658-668
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• 2015

The purpose of present study tested the effects of context, transparency, familiarity and related variables on comprehension of 32 idioms in 87 Chinese learners of Korean who were attending the S university in Jeonnam providence. In the first assessment, idiomatic phrases were presented out of context. In another assessment, idiomatic phrases were embedded in supportive story contexts. To examine the difference based on task types, paired t-test or one-way ANOVA was used to test differences on related variables such as TOPIK, years of residence in Korea, major and etc. on idiom comprehension. The results of this study are summarized as follows. First, task type, familiarity and transparency were found to have no significant effect on idiom comprehension for Chinese learners of Korean. Second, the related variables such as TOPIK, and major had a significant effect on idiom comprehension. Third, percentage of context related interpretation error in context task was the highest. Literal interpretation errors were followed by it. It means they have a tendency to use contextual cues and semantic analysis of the phrase to comprehend Korean idioms. The results of study will be used to make a plan for teaching Chinese learners of Korean.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.7
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• pp.1247-1254
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• 2009

The purpose of the present study was to compare and analyze the differential effects of in-vehicle electronic device usage types(searching for targeted destinations in navigational purpose, watching TV in entertain purpose, and dialing a cellular-phone in phone-usage purpose) on driver's front-to-rear-end collision avoidance behavior, and to find effective collision warning format for this behavior. The result indicated that (1) the drivers showed more impaired collision avoidance performances when they were asked to search the name of targeted destination than the other task requirements, and (2) auditory warning appeared to be most effective among the other types of warning. In particular, it was suggested that the "Visual-Only" collision warning could induce most undesirable result when the drivers were engaged in both visual and auditory information processing.

• Journal of The Korean Association For Science Education
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• v.19 no.3
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• pp.487-500
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• 1999

Observation is one of the important aspects in science and science education. However. observation has so many varieties that the purpose and the meaning of scientific observations used in science education are different in persons, contexts, and subjects. In this study, we tried to understand the natures of scientific observation and investigated students' observational activities using four observation tasks: candle, double pendulum, iron filings around bar magnet, two electric bulbs connected in series. We required the subjects to observe the given tasks and described what did they observe. Based on students' observational descriptions, students' observational activities could be classified in four categories: primitive, interpretive, operational, and interfered observation. Also, we could find that some of the descriptions were non-observational activities such as predicting and questioning and so on. Finally, implications for the teaching of observation in science education are suggested.

• Korean Journal of Childcare and Education
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• v.11 no.1
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• pp.153-171
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• 2015

The purposes of this study were to explore the relations of preschoolers' narrative representation profile types to diurnal cortisol regulation pattern at home. Fourteen story stems from the MacArthur Story Stem Battery (MSSB, Bretherton, et al., 1990) were administered to 40 preschoolers(22 boys, 18 girls, aged 5) recruited from 8 kindergartens in the Seoul and Gyeonggi areas. And also, their saliva cortisol was collected. The children's responses were aggregated into 5 dimensions, based on content themes and performance scores, which included emotions expressed and narrative coherence using the MacArthur Narrative Coding System(Robinson, et al., 2004). Data were analyzed by means of cluster analysis. Five response profiles emerged over the course of this research: Prosocial, Anxiety, Dyregulated aggression, Restricted, and Avoidance profiles. Cortisol at home showed decrease diurnal cortisol regulation patterns, however it showed a difference according to narrative response profiles. Restricted, Prosocial, and Avoidance profiles showed decrease diurnal cortisol regulation patterns. Anxiety profiles showed flat pattern, and Dyregulated aggression profile showed rising diurnal cortisol regulation pattern. These results show the preschoolers' internal representation may affect the diurnal cortisol reaction in daytime.

• Annual Conference on Human and Language Technology
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• 2014.10a
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• pp.73-77
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• 2014

문장을 대상으로 특정 응용 분야에 필요한 요소를 자동으로 추출하는 정보 추출(information extraction) 과제는 자연어 처리 및 텍스트 마이닝의 중요한 과제 중 하나이다. 특히 추출해야할 요소가 한 단어가 아닌 여러 단어로 구성된 경우 추출 과정에서 고려되어야할 부분이 크게 증가한다. 또한 추출 대상이 되는 요소의 유형 또한 여러 가지인데, 감정 분석 분야를 예로 들면 화자, 객체, 속성 등 여러 유형의 요소에 대한 분석이 필요하며, 비교 마이닝 분야를 예로 들면 비교 주체, 비교 상대, 비교 술어 등의 요소에 대한 분석이 필요하다. 본 논문에서는 각각 여러 단어로 구성될 수 있는 여러 유형의 요소를 동시에 추출하는 방법을 제안한다. 제안 방법은 구현이 매우 간단하다는 장점을 가지는데, 필요한 과정은 형태소 부착과 변환 기반 학습(transformation-based learning) 두 가지이며, 파싱 혹은 청킹 같은 별도의 전처리 과정도 거치지 않는다. 평가를 위해 제안 방법을 적용하여 비교 마이닝을 수행하였는데, 비교 문장으로부터 각자 여러 단어로 구성될 수 있는 세 가지 유형의 비교 요소를 자동 추출하였으며, 실험 결과 정확도 84.33%의 우수한 성능을 산출하였다.

• The Journal of the Convergence on Culture Technology
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• v.7 no.1
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• pp.620-631
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• 2021

The study aim to test the effect of voice agent's preceding utterance type on the user experience in the smart home contexts by conversation types. Based on two types of conversation (task-oriented vs. relationship-oriented conversations) and two types of utterance (preceding vs. response utterances), four different scenarios were designed for experimental study. A total of 62 participants were divided into two groups by utterance type, and exposed to two scenarios of the conversation types. Likeability, psychological reactance, and perceived intelligence were measured for the user experience of conversational agent. The result showed main effects of likeability in task-oriented conversations, and of psychological reactance in preceding utterances. The interaction effect demonstrated that preceding conversation improved the likeabilitty and perceived intelligence in the task-oriented conversations.

• Journal of the Korean School Mathematics Society
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• v.23 no.1
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• pp.129-158
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• 2020

In this study, we presented two geometric tasks to three 11th grade students to identify the characteristics of the images that the students had at the beginning of problem-solving in the problem situations and investigated how their images changed during problem-solving and effected their problem-solving behaviors. In the first task, student A had a static image (type 1) at the beginning of his problem-solving process, but later developed into a dynamic image of type 3 and recognized the invariant relationship between the quantities in the problem situation. Student B and student C were observed as type 3 students throughout their problem-solving process. No differences were found in student B's and student C's images of the problem context in the first task, but apparent differences appeared in the second task. In the second task, both student B and student C demonstrated a dynamic image of the problem context. However, student B did not recognize the invariant relationship between the related quantities. In contrast, student C constructed a robust quantitative structure, which seemed to support him to perceive the invariant relationship. The results of this study also show that the success of solving the task 1 was determined by whether the students had reached the level of theoretical generalization with a dynamic image of the related quantities in the problem situation. In the case of task 2, the level of covariational reasoning with the two varying quantities in the problem situation was brought forth differences between the two students.

• Information and Communications Magazine
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• v.33 no.3
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• pp.20-28
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• 2016

본고에서는 과거 통합지휘무선통신망 사업부터 현재 재난안전통신망 구축 시범사업 추진까지의 재난안전통신망 구축 추진 경과를 살펴보고, 기지국 수, 상용망 활용 수준, 단말 보급 시기와 유형별 물량 등 시범사업 주요 논쟁 이슈 및 향후 쟁점과 과제를 제시한다.