• Journal of The Korean Association For Science Education
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• v.26 no.2
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• pp.258-267
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• 2006

The purpose of this study was to investigate the practical use of process skill under the seventh curriculum at secondary school and teachers' perceptions about hypothesis. Two hundred and twenty-two secondary science teachers responded to a survey. Among all process skills, data interpretation was found to be used most frequently by science teachers. The second most-commonly utilized skill was conclusion, and the least employed skill was hypothesis formation followed closely by data transformation. In addition to these results, the most difficult process skill practised by science teachers was hypothesis formation, followed by data transformation, and controling variables. A majority of science teachers (63.1%) properly defined hypothesis, but only a significant number (5.0%) chose the correct example about hypothesis in real-world contexts. More than ninety percent of science teachers believed the skill of hypothesis formation could be put to use in junior high to senior high school, but practical use of the skill, was too difficult for the science class

• Journal of Gifted/Talented Education
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• v.25 no.1
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• pp.59-76
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• 2015

The study aimed to investigate elementary school gifted students' hypothesis-generating ability and characteristics of hypotheses and to analyze the correlation between hypothesis-generating ability and meta-cognition. Nineteen students enrolled in a science gifted education center affiliated with a university in 2013 were selected as research subjects. An instrument of open ended items about hypothesis generating was developed and administered to students, and their meta-cognition as well as their preferred science teaching method were examined. Hypotheses generated by students were classified into two categories: scientific and non-scientific hypotheses, and then a closer analysis was conducted on characteristics of non-scientific hypotheses. It was found that 47% (18 out of 38 hypotheses) was scientific ones showing that elementary school gifted students in science in this study presented low level of ability in generating hypothesis. It was also found that non-scientific hypotheses frequently showed characteristics of uncertain in causality or impossible to verify relationships. Furthermore, differences in hypothesis-generating ability and characteristics of hypotheses were appeared in conditions whether inquiry questions and variable identification process were given or not. Students showed high abilities in hypothesis generating and variable identifying when inquiry questions and variable identification process were given. Compared to previous research results, students in the study showed high level of meta-cognition and tendency of utilizing monitoring strategy more than planning and regulating. In ill-structured conditions that students themselves find inquiry questions and identify variables, a significant (p<.05) correlation appeared between hypothesis generating ability and meta-cognition and a high level of correlation between planning and regulating strategies. It was also found that differences existed in hypothesis-generating ability and preferred science teaching methods between students with high level and those with low level of meta-cognition; and students with low level of meta cognition showed difficulties in generating hypothesis and identifying variables.

• Journal of The Korean Association For Science Education
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• v.26 no.3
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• pp.356-366
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• 2006

The purpose of this study was to investigate the effects of offering similar experiences for hypothesis-generation based on abduction. Two hundred and seventy eight students in Seoul(8th and 10th grades) were requested to propose causal questions and generate hypotheses after observing an unfamiliar situation. Then, after having been presented numerous similar experimental situations to initial situation, the students were asked to regenerate a hypothesis. When the $X^2$ analysis was done to determine differences in hypothesis generation before and after offering the similar experimental situations, a meaningful difference appeared(p<.001). This study proposes that offering similar experimental situations ease hypothesis-generation based on abductive reasoning. Additionally, the second meaningful difference was discovered when the $X^2$ analysis was carried out to find differences in causal question proposal and hypothesis generation among students who had varied cognitive levels(p<.05) Considering the findings of the study, a progressive stage offering similar scenarios may further abductive reasoning while implementing lessons related to hypothesis generation in middle and high school.

• Journal of Gifted/Talented Education
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• v.21 no.4
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• pp.1033-1053
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• 2011

In the process of establishing the principle of genetics, Mendel discovered problems based on various observations. Mendel's scientific thinking ability can be effective if this ability is embedded in gifted science education programs. The study aims to develop a science gifted education program utilizing Mendel's scientific thinking ability shown in the principles of genetics and examine students' changes in scientific thinking ability before and after the program implementation. For the program development, first, the characteristics of Mendel's scientific thinking ability in the process of establishing the principle of genetics were investigated and extracted the major elements of inquiry. Second, the science gifted education programs was developed by applying the inquiry elements from the Mendel's Law. The program was implemented with 19 students of $7^{th}$, $8^{th}$ graders who attend the science gifted education center affiliated with university during July 2011. The Mendel's scientific thinking ability was classified into induction, deduction, and integration. The elements of inquiry extracted from the Mendel's scientific thinking include making observation, puzzling observation, proposing causal questions, generating hypothesis, drawing inference, designing experiment, gathering and analyzing data, drawing conclusions, and making generalization. With applying these elements, the program was developed with four phases: $1^{st}$ - problem finding; $2^{nd}$ - hypothesis generating; $3^{rs}$ - hypothesis testing and $4^{th}$ - problem solving. After implementation, students' changes in scientific thinking ability were measured. The findings from the study are as follows: First, students' abilities of problem finding is significantly (p<.05) increased. Second, students' abilities of hypothesis generating is significantly (pp<.05) increased.

• The Korean Journal of Financial Management
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• v.12 no.1
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• pp.57-74
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• 1995

본 연구는 산업(産業)의 배당결정행태(配當決定行態)를 주식시장에 존재하는 비대칭적(非對稱的) 정보구조(情報構造)로 설명하고자 하는 신호가설(信號假說)과 대리인비용가설(代理人費用假說)의 검정에 관한 것이다. 배당자료의 특성과 panel자료의 사용으로 인하여 통상적인 추정 방법을 사용할 경우 문제가 발생하게 된다. 본 연구에서는 특정한 형태의 불균등 분산을 가정한 HAT모형을 대안으로 제시하였다. 모형설정검정을 위한 통계량을 도출하여 설정검정을 해본 결과 HAT모형의 실용적 타당성이 입증되었으며 Lintner모형을 응용한 배당결정모형(配當決定模型)에 HAT모형을 적용시켜 실증분석에 사용하였다. 그 결과 신호가설(信號假說)과 대리인비용가설(代理人費用假說)에 의해 모형에 포함된 변수들은 비유의적(非有意的)인 것으로 판명되어 두 가설(假設)은 모두 기각(棄却)되었다.

• The Korean Journal of Financial Management
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• v.11 no.2
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• pp.161-173
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• 1994

유상증자의 주가하락에 대하여 유상증자 공시일전 내부자순매수를 종속변수로 설정하여 선형회귀분석한 결과, 이전의 논문결과와는 달리 유상증자규모효와 자본구조변화효과는 보이지 않았으며, 반면에 유상증자의 주가하락이 내부자순매수와 통계적 유의성이 높은 비례관계가 있음을 밝혀 내었다. 이 결과는 유상증자규모효과로 인한 가격 압박가설과 자본구조변화효과로 인한 부의 이전가설을 기각시키고 정보전달가설이 유상증자의 주식 가격 하락현상을 설명하는 설득력 있는 가설임을 시사하고 있다.

• The Korean Journal of Financial Management
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• v.21 no.1
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• pp.125-148
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• 2004

This paper deals with the relationship between money supply and the stock market. However, unlike past works, it has employed a rational expectation hypothesis and an efficient market hypothesis drawn from new classical macroeconomics and new Keynesian macro-economics, respectively. Accordingly, hypothesis 1 states that if economic subjects have rational expectation, they will immediately respond to a change in money supply. On the other hand, hypothesis 2 supposes that the expectation of economic subjects has changed after the currency crisis. This paper has first identified unit root by using the augmented Dickey-Fuller test and the Phillips-Perron test, then testing both hypotheses by employing the Johansen Procedure and vector error correction model for the periods before and after a currency crisis.

• Asia Marketing Journal
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• v.1 no.3
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• pp.109-119
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• 1999

서비스마케팅에 있어서 종업원의 행동통제와 결과통제에 대한 중요성이 증대하고 있다. 그 중에서 행동통제를 보다 효율적으로하기 위하여 많은 연구가 진행되고 있다. 본 연구는 마케팅조직 종업원의 행동통제 지각이 조직내 종업원이 행동에 어떠한 영향을 주는지를 조사하였다. 종업원이 느끼는 통제지각, 상사의 피드백, 비금전적 보상 그리고 종업원의 역기능 행동 간의 다섯가지 관계에 대하여 가설이 설정되었다. 병원간호사 120 명의 설문응답에 근거하여서 가설검증을 하였다. 다섯 개의 가설중 세 개는 지지되었고, 두 개의 가설은 현재의 자료로는 지지되지 않았다. 가설검증 결과에 근거하여서 시사점과 결론이 제시되었다.

• The Journal of the Korea Contents Association
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• v.13 no.3
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• pp.402-413
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• 2013

A traditional house or a traditional village experience has been on the rise as a form of experiential cultural tourism. But the Oeam folk village, a experiential cultural tourist destination representing Chungcheng-do seems to confront the stagnancy in the part of growth. It has to grow in two sides of quantity and quality. On the ground of this critical mind, 3 assumptions were established after analyzing previous studies. Additionally, market segmentation using satisfaction factors was practiced. In order to verify assumptions, A questionnaire was made and a survey was practiced. Out of statistic analyses, cluster analysis was practiced to do market segmentation targeting people who visit Oeam folk village and regression analysis to verify established assumptions. The assumption 1 was adopted that satisfaction factors influence whole satisfaction. The assumption 2 was partly adopted that satisfaction factors(sightseeing efficiency, sightseeing convenience, traditional house and experience factor) except food and souvenir factor influence behavior intention. The assumption 3 was adopted that whole satisfaction influences behavior intention. These were similar with the results of previous studies. As the result of cluster analysis to confirm the difference of demographic characteristics according to the market, 2 clusters was classified and classified clusters showed the difference of demographic characteristics.

• The Korean Journal of Financial Management
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• v.14 no.3
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• pp.231-261
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• 1997

본 연구는 우리나라 상장기업에서 만연하고 있는 대주주와 소액주주간의 차등배당이 결정되는 배경을 이해하기 위하여 투자재원가설, 이익가설 및 특권적소비가설의 세가지 가설을 설정하고 상장기업 191개사에 대하여 1987년부터 1996년까지 10년간을 자료를 이용하여 실증분석을 실시하였다. 실증분석은 균등배당업체와 차등배당업체간의 기업 특성의 평균차이분석과 차등배당여부를 종속변수로 하고 기업특성변수를 독립변수로 한 Logit 분석의 두 가지를 실시하였는데 실증분석결과를 요약하면 다음과 같다. 먼저 이익가설은 전반적으로 지지되었으나 이익가설의 핵심인 배당감소의 역정보효과가설은 지지하는 뚜렷한 증거를 발견할 수 없었다. 투자 재원가설은 재벌기업과 비재벌기업간에 큰 차이를 보였는데 비재벌기업은 투자재원의 크기가 차등배당가능성에 유의적인 부의 영향을 주는 반면 재벌기업은 투자재원의 크기가 차등배당에 유의적인 영향을 주지 않는 것으로 나타나 재벌기업에는 내부자본시장이 존재함이 간접적으로 입증되었다. 끝으로 특권적소비가설은 제2대주주의 존재여부가 차등배당 가능성에 부의 유의적인 영향을 주는 것으로 나타나 부분적으로 지지되었다.