• 한국학교수학회논문집
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• 제19권4호
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• pp.357-371
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• 2016

본 연구는 수학적 모델링의 과제공간을 설정하고 이를 기반으로 모델링 과제의 복잡성을 나타내는 평가척도(rating scheme)를 설계하여 예비 수학교사를 대상으로 두 가지의 실험연구 결과를 얻었다. 첫째는 종전의 문제구조를 표현한 문제공간을 발전시켜 모델링 과제에 맞는 과제공간을 설정하고, 모델링 과제의 복잡성을 수치로 나타내는 계량적인 평가척도를 설계하여 의미 있는 타당도를 확인하였다. 둘째는 모델링의 과제 복잡성에 대한 평가척도, 학생 성취수준, 과제 특수 발견 전략의 개수 사이의 일관된 패턴이 있음을 발견하였다.

• 아동학회지
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• 제23권6호
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• pp.33-47
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• 2002

This study examined the effects of conditions of generation(0, 1, or 2 cognitive operations) and task difficulty in children's recall. Subjects were 40 children in each age group, 8-year-olds and 10-year-olds. Each subject was shown 12 simple or difficult multiplication problems in one of the conditions of generation. After a buffer task, subjects were required to recall correct answers to the problems in random order. The data were analyzed by ANOVA and simple main effect analyses. Results showed that generation effect(GE) occurred among children younger than 12, and GE improved with age. Learning from cognitive operations was more effective than learning through simple repetition. Easier tasks led to greater GE, a phenomenon explained by procedures used in this study.

• Educational Technology International
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• 제20권2호
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• pp.137-168
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• 2019

This study examined the effects of information volume and distribution on learners' cognitive load and recall in a mobile augmented reality (AR) environment. Information volume refers to the degree of information users are provided in a learning task, while information distribution indicates the way in which information is distributed, either in a virtual or real format. Sixteen undergraduate students participated in the study, which employed a 2 × 3 randomized block factorial design with repeated measures. Information volume and distribution were independent variables, and factors in learners' cognitive load (mental effort, perceived ease of use, and perceived task difficulty) and recall test scores were the dependent variables. Information volume had significant main effects on perceived ease of use and task difficulty, and recall test scores, while information distribution had significant main effects on perceived task difficulty and test scores. A detailed discussion and implications are provided.

• 대한수학교육학회지:수학교육학연구
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• 제20권3호
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• pp.413-444
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• 2010

본 연구에서는 우리나라 학생들의 수학 학습 동기와 귀인에 대한 각각의 측정 도구를 개발하고 그 적용 결과를 분석하였다. 수학 학습 통기 측정 도구는 '자기조절효능감' 17문항, '과제난이도' 9문항, '수학 불안' 9문항의 총 35문항으로, 귀인 측정 도구는 성공과 실패 귀인으로 구분하여 개발하였다. 성공귀인은 '노력/능력'이 6문항, '운'이 4문항, '타인'이 3문항의 총 13개로, 실패귀인은 '노력'이 7문항, '운'이 3문항, '능력'이 3문항, '타인(외적)'이 4문항의 총 17개로 이루어졌다. 수학 학습 동기의 세 요인 간의 상관을 분석한 결과, 과제난이도와 자기조절효능감은 정적 관계 나타냈고 수학 불안은 다른 두 요인과 부적 관계를 보였다. 수학 성취가 우수한 집단은 과제난이도와 자기조절효능감이 가장 높았고 수학 불안은 가장 낮았으며 기초이하 집단이 수학 불안이 가장 높았다. 또 남학생이 여학생보다 어려운 문제에 도전적이며, 수학 학습에 대한 자신의 학습 능력과 노력의 정도에 대한 자가 판단이 긍정적이었다. 그러나 수학 불안에서는 여학생이 남학생보다 불안 수준이 높게 나타났다. 동기와 귀인의 각 구성 요인간 상관을 분석한 결과, 과제가 어려운 것을 선호하거나 자기조절효능감이 높은 학생일수록 수학 학습의 성공의 원인을 노력/능력 귀인에서 찾지만, 운의 탓으로 돌리는 경향은 낮았다. 수학 불안이 높은 학생일수록 수학 학습의 성공의 원인을 운으로 귀인시키는 경향이 강하였다.

• 아동학회지
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• 제36권4호
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• pp.229-242
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• 2015

The purpose of this study was to investigate young children's nonsymbolic arithmetic ability according to task difficulty. The participants in this study comprised 43 2-year-old children and 48 4-year-old children recruited from 5 childcare centers located in Seoul, Korea. All tasks were composed of comparison, addition, subtraction, multiplication and division tasks. In addition, each arithmetic task varied with the ratio of the two quantities; low level(1:2), middle level(2:3), high level(4:5). The results revealed that 2 & 4-year-old children could perform a large numerical range of nonsymbolic arithmetic tasks without influences from previously learned mathematics. This finding suggests that children have a degree of numerical capacity prior to symbolic mathematics instruction. Furthermore, children's performance on nonsymbolic arithmetic tasks indicated the ratio signature of large approximate numerical representation. This result implies that large approximate numerical representation can be used in arithmetical manipulations.

• 한국군사과학기술학회지
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• 제19권6호
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• pp.789-796
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• 2016

In the Core Technology R&D of the defence area, the development of the related core element technology could be the foundation to develop advanced weapon system in the future. But it might make various problems if you can not accurately define the TRL of the element technology. In other words, if the technology is not sufficiently mature and then the project starts, it might require an increase in the development period and additional cost. Finally the system will be in an incomplete state and result in user dissatisfaction and the project failure. Therefore it is a very important task to properly assess the TRL for a successful project. In this study, We propose the method for risk management of core technology R&D project of the defence area using the QFD process with degree of difficulty and technology readiness level. It is also presented the process to determine the risk level using TRL and Degree of difficulty. Finally We apply this method to UGV system for verifying the result of this study.

• 유통과학연구
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• 제14권3호
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• pp.85-91
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• 2016

Purpose - Prior research has suggested that consumers typically prefer to have a larger number of options. However, preference of assortment size may depend on how depleted resources in consumers' mind are. Reduced capacity for self-regulation by resource depletion makes people rely on more intuitive and less effortful decision processing. When they are mentally depleted, people are likely to focus on the choice difficulty from large assortment, which leads to preference for the small assortment when they make a decision. It could be an important question potentially how being in a depleted mode through effortful self-regulation will influence on the evaluation of assortment size. To answer this questioner, we hypothesized that being engaged in self-regulation, as compared with not being engaged in self-regulation, will influence on the evaluation of product assortment size such as attractiveness, difficulty of choice, and anticipated regret. Research design, data, and methodology - In this study, we first manipulated self-regulatory resource availability using a self-regulation task (i.e., instructing participants to solve Sudoku puzzle vs. to solve diagram cube by filling any diagrams that they prefer into cube instead of number) and asked to indicate the difficulty of the tasks available to them ("How much difficulty did you feel when you complete the task?") Next, participants were asked to imagine that they were planning to buy a laptop at one of the two stores (small assortment: 6 options vs. large assortment: 30 options), both offering good quality of products. After reading the product descriptions, participants were instructed to consider all the information and choose a store that they would like to shop. Finally we measured the choice difficulty, evaluation of product assortments, and anticipated regret on a 7-point scale. We conducted two-way ANOVA in testing the main hypothesis that depleted consumers will show poorer subsequent self-control than non-depleted consumers when they make a decision in large assortment. Results - Compared with non-depleted participants, depleted participants showed the bigger difference from the degree of choice difficulty and product attractiveness between large and small assortments, but the result revealed only a significant interaction effect of resource depletion and assortment size on choice difficulty. Also depleted participants showed the smaller difference from the degree of anticipated regret between large and small assortments than non-depleted participants. Conclusion - Depleted individuals by a prior task are relatively effortless and intuitive form of choosing products so that they try to avoid making effortful trade-offs among choice difficulty such as large assortment, compare with non-depleted individuals. However, for anticipated regret, non-depleted individuals in small assortment anticipate more regret by excluding or at least restricting the possibility of buying attractive items or another kind of potential items than depleted individuals, regardless less choice difficulty in small option. To sum up, it is important to note that individuals are influenced by self-regulatory resources and their self-regulatory conditions contribute to the overall positive or negative impact of product assortment on choice.

• 과학교육연구지
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• 제43권1호
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• pp.157-172
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• 2019

이 연구의 목적은 난이도가 다른 생명과학공통성 발견 과제를 수행하는 동안 뇌 활성 차이를 분석하는 것이다. 이 연구에는 35명의 예비 생명과학교사들이 참여하였다. 이 연구는 뇌파 기록을 위한 블록디자인으로 설계되었다. 피험자들이 공통성 발견 과제를 수행하는 동안 뇌파가 수집되었다. sLORETA 분석 방법과 상대파워스펙트럼 분석 방법은 2개의 소재로 구성된 쉬운 난이도의 과제를 수행할 때와 5개의 소재로 구성된 어려운 난이도의 과제를 수행할 때 뇌 활성 차이를 분석하는 데에 이용되었다. 그리고 공통성 발견 과제의 난이도에 따라 활성화된 대뇌 피질과 피질하 영역의 역할을 조사하였다. 연구 결과 연구결과, 세타파의 경우, 쉬운 난이도 과제와 비교하여 어려운 난이도 과제 수행 시 세파타의 활성은 전두엽에서 유의미하게 감소하였고 후두엽에서는 증가하였다. 알파파의 경우, 쉬운 난이도 수행시보다 어려운 난이도의 과제를 수행할 때 전두엽에서 알파파의 활성이 유의미하게 감소하였다. 베타파의 활성은 어려운 난이도의 과제를 수행할 때 쉬운 난이도의 과제 수행시보다 전두엽, 두정엽, 후두엽에서 유의미하게 감소하였다. 마지막으로 감마파의 경우 쉬운 난이도의 과제를 수행할 때와 비교하여 어려운 난이도의 과제를 수행할 때 감마파의 활성이 전두엽에서는 감소하였고 두정엽과 측두엽에서는 활성이 증가하였다. 공통성 발견 과제의 난이도 수준은 대상이랑(cingulate gyrus), 쐐기소엽(cuneus), 혀이랑(Lingual gyrus), 후측 대상피질(posterior cingulate), 쐐기전소엽(precuneus), 엽하영역(sub-gyral)에 영향을 준다는 것을 보여주었다. 따라서 공통성 발견 과제의 난이도는 이미지로부터 인출된 시각적 정보와 위치정보를 통합하는 과정, 대상의 속성을 비교하고 필요한 정보를 선택하는 과정, 선택한 정보의 시각적 작업 기억 과정, 이 모든 과정에서의 주의집중에 대한 인지과정에 영향을 준다고 할 수 있다.

• 재활간호학회지
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• 제12권1호
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• pp.16-29
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• 2009

Purpose: The aim of this study was to develop and to analyze the duty and the task of rehabilitation nurse in Korea. Method: The definition of rehabilitation nurse and job description was developed based on developing curriculum(DACUM) by panels who have experienced in DACUM analysis and rehabilitation nursing. 228 nurses who were working at rehabilitation centers and rehabilitation unit in general hospitals were participated. The questionnaire included frequency, importance, and difficulty of duties and tasks. The data were collected in March and April 2009, analyzed by descriptive statistics. Results: The job description of rehabilitation nurse in Korea revealed 11 duties, and 61 tasks. On the all 11 duties, the highest duty in frequency and importance was direct nursing care ($2.47{\pm}.31$, $2.77{\pm}2.8$) and the highest duty in difficulty was self-development ($2.39{\pm}.48$). Among the tasks of duties 'direct nursing care' in 'manage medication' ($2.87{\pm}.35$) in frequency, the task 'prevent and manage bedsore' ($2.91{\pm}.31$) of duty 'direct nursing care' in importance, and 'cope emergency situations' ($2.72{\pm}.49$) of duty direct nursing care in difficulty showed the highest degree. Conclusion: The political efforts for the legislation of role and task of rehabilitation nurse were needed.

• 영어어문교육
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• 제12권4호
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• pp.69-89
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• 2006

This study investigated whether and how semantic nature of intransitive verbs can be related to the L2 overpassivization errors. A total of 126 Korean high school students participated in a grammaticality judgment test on English sentences in which seven semantically different types of intransitive verbs were passivized. The results showed that there was an effect of semantic type on the students' judgment on overpassivization errors. Overall, it was shown that the students experienced the lowest degree of difficulty with the Controlled Process-Motional type verbs while experiencing the high degree of difficulty with the Change of State, Existence of State, Continuation of Pre-existing State, and Uncontrolled Process types. Two interlanguage patterns were also identified: the students at higher proficiency level and those at lower-proficiency level showed distinctive patterns on the task. It was argued that the simple dichotomy of unaccusative-unergative distinction does not suffice for the explanation of the complex phenomenon of L2 overpassivization.