• Journal of the Korean Chemical Society
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• v.43 no.6
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• pp.707-719
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• 1999

This article studies the understanding of acid and base concepts of the 3rd-grade students in middle school. An effective teaching strategy for improving their acid and base concepts was designed by considering students' prior knowledge using Lawson's learning cycle method. The control group was adapted by the traditional teaching strategy which isn't considering students' prior knowledge. After the class, understanding of acid and base concepts of treatment group was significantly higher than that of control group. But the level of students' understanding of strong acid, weak acid strong base and the strength of acid in aqueous solution was low even after the class of two groups. This indicates indirectly that the microscopic views of acid and base concepts in aqueous solution are not easy to learn for these students. For the four categories of acid and base concepts, students' responses were reviewed carefully and classified into scientific conceptions and misconceptions. These results will be useful for developing an effective teaching strategy of acid and base concepts.

• Korean Journal of Cognitive Science
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• v.11 no.3_4
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• pp.73-81
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• 2000

This study was conducted to investigate some characteristics of representation of category knowledge and script knowledge. Using primed lexical decision task with higher level primers in the representation structure, Experiment 1 examined the interaction effects between knowledge type and concept typicality. It was found that the concept typicality has some effects in category representation, while it has no significant effect in script representation. In Experiment 2, primers of the lower hierarchy in the representation structure were employed. The results showed that the main effect of knowledge type was significant: the response time for category knowledge was faster than that for script knowledge. Typicality effect did not show in this experiment. The results of t the two experiments suggest that category knowledge is represented in hierarchy and typicality. while script knowledge may lack in that characteristics. Other aspects of the differences in characteristics of category- and script- knowledge representation were discussed,

• Journal of The Korean Association For Science Education
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• v.25 no.3
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• pp.400-410
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• 2005

According to the cognitive conflict process model, student anxiety factor is known to have both positive and negative effects on student response behaviors in a conflict situation for conceptual change learning. However, there is little research that reveals what type of anxiety, either constructive or destructive, is related when conducting step-by-step experiments to resolve cognitive conflicts. This study attempted to learn the characteristic of explanatory hypothesis according to anxiety type after conducting five step-by-step experiments related to action and reaction concept. Results found that students who belonged to the types of 'conviction in logical misconception', 'insisting on additional variables', and 'reasonable modification' suggested explanatory hypothesis close to physical nature. On the other hand, those who showed the other five types of anxiety ('compatible predictions', 'dependence on others', 'fusion of past experience', 'lack of confidence', and 'conflict with past experience') suggested temporary supported hypothesis or simple explanatory hypothesis according to student intuition and simple observation. These results indicate that students in the above-mentioned five categories need more external interactions with instructors based on the type of anxiety related to student behavior. In addition, the results present student characteristics which instructors should be more attentive to when using step-by-step experiments to resolve cognitive conflicts.

• Journal of The Korean Association For Science Education
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• v.24 no.5
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• pp.1008-1017
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• 2004

In physics education, language is an fundamental learning tool as in other subjects. In writing activity, students can get fair opportunities to express their own ideas during the class. Even though there are various styles of writing, students are usually supposed to make a report in their science classes. But there have been few studies in science education on the tasks and features of student's science writing. In this research, different styles of writing tasks were designed for science classes, and students' writing was analysed in terms of conceptual and emotional aspects. Also the usefulness of each task type was discussed relating to school physics education. Four types of writing, i.e. , , , and writing were developed, and 'The reflection of light' was selected as the theme and given to students. Four types of writing were analysed in this paper. In each type of writing, students showed different features in their conception. They also showed emotional expressions in imaginative writing types, that is, and types. Based on these results, it is recommended that in physics teaching various types of writing need to be designed, developed and applied according to the aim of a particular lesson.

• Journal of the Korean Chemical Society
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• v.46 no.4
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• pp.353-363
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• 2002

In this study, characteristics of the problem solving process of the balancing redox equations was ana-lyzed by mental capacity and problem solving methods, and the pertinent teaching and learning guidance for oxidation-reduction unit was suggested. Participants were 79 senior high school students and 57 science high school students. Tests were conducted to measure the mental capacity, the understanding of the oxidation-reduction concepts and the com-pletion of the balancing redox equations. The framework was made to find the patterns of failure and success. As the analysis of the influence on the performance of mental capacity,understanding of the oxidation-reduction concepts, and problem solving methods, students who had lower understanding of oxidation-reduction concepts selected the trial and error method, and their performance were influenced by mental capacity. The students that had higher understanding of the oxidation-reduction concepts had good performance by using oxidation number method regardless of their mental capacity. As the results of analysis for the patterns, the success patterns of solving the problems, those of mostly the sci-ence high school students, were the cases of using oxidation number method well and lessening problem solving steps. The patterns of failure in solving problems by using trial and error method showed that students had mistakes in cal-culating, errors in making unknown equations, no consideration for all variables, or stopped solving the complicated problems. The patterns of failure in solving problems by using oxidation number method showed that many students had wrong oxidation number or no consideration for mass and charge balance.

• Journal of the Korean School Mathematics Society
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• v.16 no.2
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• pp.435-457
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• 2013

The purpose of this paper is to discover effective teaching and learning methods for improving low level mathematic matriculants', who passed the early decision program, problem solving abilities by analyzing their error patterns in the special lecture for basic mathematics in P University. In this paper, we examine the matriculants' understanding and errors on the fundamental concepts of function, and continuity and differentiability of function based on the pre-examination. We also measure the their academic achievement in the special lecture for basic mathematics, and analyze the differences of error patterns between pre-test and post-test result on the concepts of continuity and differentiability of function.

• Journal of the Korean Society for Library and Information Science
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• v.41 no.4
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• pp.295-314
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• 2007

IFLA's FRBR model is a significant contribution to cataloging on both theoretical and practical grounds. This paper provides a brief overview of FRBR, a methodology for applying the FRBR work concept to a random sample of 1,000 bibliographic records taken from Korean National Bibliographic, and estimates of the number of works in Korean National Bibliographic and their associated characteristics, based on analysis of the sample. FRBR model can be applied to 16.9% of all works in Korean National Bibliographic. Results suggest that the majority of benefits associated with applying FRBR to Korean National Bibliographic could be obtained by concentrated on a relatively small number of complex works.

• Journal of The Korean Association For Science Education
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• v.25 no.2
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• pp.79-87
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• 2005

We compared algorithmic problem solving and conceptual understanding of chemistry with three types (algorithmic, pictorial- and wordy-formatted conceptual) of problems. The familiarity, confidence, and preference to the three type of problems were also examined. The chemistry problem solving ability test was administered to 228 students from two top high schools in the province of Gyeonggi who were preparing the chemistry examination among the four optional subjects (biology, chemistry, earth science, physics) for enter university. After administrating the chemistry problem solving ability test, the degree of familiarity to some problems and the degree of confidence of their answers in a Likert scale were asked to the students. Besides, the students were asked to place preference to the type of problems in order. The students scored better on the algorithmic problems than on the conceptual problems (pictorial and wordy problems), and were also most familiar with the algorithmic problems. The students were more confident of their answers on both of types pictorial and algorithmic problems, and preferred pictorial problems rather than both of types algorithmic and wordy problems.

• Journal of the Korea Convergence Society
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• v.12 no.2
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• pp.233-246
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• 2021

The present study aimed to investigate whether there would be differences in the severity of PTSD symptoms, self and others concepts between trauma types. Among 166 university students, 61 (simple trauma's n = 31, complex trauma's n = 30) finally met the criteria and completed the Life Events Checklist, Impact of the Event Scale-Revised, and the emotional Stroop task. The results were as follows: firstly, PTSD symptoms were higher in complex trauma group than single trauma group. Secondly, response time in the complex trauma group was longer in the condition that the negative word related to 'self' was presented for 2 seconds compared to the single trauma group. These results suggest that the complex trauma group has different features at least in the severity of PTSD symptoms and the concept of the self, compared with the single trauma group. Finally, the therapeutic implications and limitations of the study were discussed.

• Proceedings of the Korean Society of Community Living Science Conference
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• 2009.09a
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• pp.94-94
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• 2009

농업계고등학교 교과서는 농촌어메니티를 학습할 수 있는 최적의 교재로서 농촌어메니티 교육내용을 개발함으로써 청소년의 올바른 농업 농촌 가치관 형성 및 국민적 공감대 확산에 이바지하고자 한다. 대상 교과서는 농업계고등학교 교과서 39종으로 이루어졌으며, 연구방법으로는 우선적으로 1~5단계의 내용분석 척도를 설정하여(1단계는 어메니티 개념에 따라 반드시 수정이 필요한 내용, 2단계는 어메니티 개념에 따라 수정이 필요한 내용, 3단계는 어메내티 개념이 포함되었는지 판단할 때 크게 문제가 없는 내용, 4단계는 어메니티 개념이 포함되어 있는 좋은 내용, 5단계는 어메니티 개념이 포함되어 있는 교과서의 모델이 될 수 있는 내용) 판정하였다. 그 결과 1단계 어메니티 개념에 따라 반드시 수정이 필요한 내용을 선정하여 교과내용을 개발하였으며, 이는 어메니티 관점에 맞추어 실시하였다. 또한 내용분석을 통한 교과서 구분을 하여 A, B, C 유형으로 나타내었다. A유형은 내용분석의 결과 판정 1 또는 2의 분석 내용이 20개 이상 나온 교과서, B유형은 내용분석의 결과 판정 1 또는 2의 분석 내용이 10~19개 나온 교과서, C유형은 내용분석의 결과 평정 1또는 2의 분석 내용이 10개 미만으로 나온 교과서를 의미한다. 교과내용 개발 결과 총 262건의 교과내용 개발이 이루어졌으며, 문장 132개로 50.38%, 사진 105개 40.47%, 삽화 22개 8.35, 그래프 0.76%, 표 0.38% 등의 순서로 나타났다. 총 262개 개발내용중에서 '사회자원의 시설'부분에 대한 관점 77개로, '사회자원의 경제활동'에 대한 관점 64개, '문화자원의 경관'에 대한 관점 50개 순으로 집계되었다. 그 다음은 '자연자원의 자연'에 대한 관점이 47개, 문화자원의 역사'에 대한 관점이 9개, '사회자원의 공동체 활동'에 대한 관점이 14개 순으로 나타났다. 자연적 자원 18.31%, 문화적 자원 22,52%, 사회적 자원 관점이 59.16%로 '사회적 자원 관점이 가장 많은 것으로 나타났다. 이는 농업계고등학교 교과서에서는 농촌어메니티의 사회적 자원이 강조되어야 하며, 문화적 자원, 자연적 자원의 순서로 강조될 필요성이 있다는 것을 뜻한다. 즉 농촌어메니티개념의 확립을 이하여 현재 농업계 고등학교 교과서에서는 시설, 경제활동, 공동체활동 같은 '사회적 자원'을 보강하여 강조할 필요가 있음을 나타낸다.