• Korean Journal of Cognitive Science
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• v.20 no.2
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• pp.125-154
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• 2009

This paper describes the possibility of human physiological data, especially brain-wave activity, to detect cognitive overload, a phenomenon that may occur while learner uses an e-learning system. If it is found that cognitive overload to be detectable, providing appropriate feedback to learners may be possible. To illustrate the possibility, while engaging in cognitive activities, cognitive load levels were measured by EEG (electroencephalogram) to seek detection of cognitive overload. The task given to learner was a computerized listening and recall test designed to measure working memory capacity, and the test had four progressively increasing degrees of difficulty. Eight male, right-handed, university students were asked to answer 4 sets of tests and each test took from 61 seconds to 198 seconds. A correction ratio was then calculated and EEG results analyzed. The correction ratio of listening and recall tests were 84.5%, 90.6%, 62.5% and 56.3% respectively, and the degree of difficulty had statistical significance. The data highlighted learner cognitive overload on test level of 3 and 4, the higher level tests. Second, the SEF-95% value was greater on test3 and 4 than on tests 1 and 2 indicating that tests 3 and 4 imposed greater cognitive load on participants. Third, the relative power of EEG gamma wave rapidly increased on the 3rd and $4^{th}$ test, and signals from channel F3, F4, C4, F7, and F8 showed statistically significance. These five channels are surrounding the brain's Broca area, and from a brain mapping analysis it was found that F8, right-half of the brain area, was activated relative to the degree of difficulty. Lastly, cross relation analysis showed greater increasing in synchronization at test3 and $4^{th}$ at test1 and 2. From these findings, it is possible to measure brain cognitive load level and cognitive over load via brain activity, which may provide atimely feedback scheme for e-learning systems.

• The Korean Journal of Coaching Psychology
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• v.6 no.1
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• pp.57-93
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• 2022

The purpose of this study is to verify the effect of the civil servant superior's coaching leadership on the innovation behavior and cooperative behavior of organizational members of public institutions. And it examines the mediating roles of subordinates' cognitive flexibility and belief of the colleague's potential growth in the relationship between coaching leadership and subordinates' innovative and cooperative behaviors. As a result of the study, first, it was confirmed that the coaching leadership of civil servant superior had a significant positive effect on the innovative and cooperative behaviors of subordinates. Second, it was verified that the superior's coaching leadership had a positive effect on the cognitive flexibility of subordinates and the belief of the colleague's potential growth. Third, it was confirmed that cognitive flexibility mediates between the superior's coaching leadership and innovative behavior. Fourth, it was not significant that the belief of the colleague's growth potential mediates between the superior's coaching leadership and cooperative behavior.

• Journal of Families and Better Life
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• v.13 no.1
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• pp.12-25
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• 1995

본 연구는 수험생 자녀를 둔 가족의 정신, 신체적 건강이 크게 위협받고 있음을 중시하고, 부모와 수험생 자녀가 겪는 스트레스를 인지, 대처, 디스트레스의 각 측면으로 측정하고 관련 변인을 분석함으로써, 이들 가족의 스트레스 극복을 위한 적절한 방안을 강구해보고자 하는데 그 목적을 두고 고등학교 3학년 재학생과 그 부모 3인을 한쌍으로 360가족, 1080명을 대상으로 자료수집 하였으며, 주요 분석결과는 다음과 같다. 1) 자녀의 학업스트레스가 가장 높게 나타났으며 다음은 모, 부의 순으로 나타났으나 모, 부간의 차이가 크지 않아 부, 모, 자녀의 순으로 대처능력이 높게 나타나 자녀는 높은 스트레스를 인지하면서도 적절한 대체방안을 사용하지 못하고 있음을 알수 있다 2) 부모자녀의 스트레스 상관도는 자녀의 경 우 스트레스 인지와 디스트레스간의 상관이 비교적 높고 부모의 경우는 스트레스 대처와 디스트레스간의 상관이 높다. 또한 부부간 스트레스는 상관이 높지만 부모 자녀간에는 상관이 높지 않게 나타나고 있다. 3) 자녀의 지원대학 수준모의 학력이나 가족의 소득부의 직업 수준등이 낮은 경우 부모나 수험생 자녀의 스트레스가 높게 나타나고 가족응집성, 자녀의 자아 정체감 학업성취욕, 부모의 결혼만족도, 부와의 친밀성, 부모 자녀 갈등등은 스트레스 수준에 영향을 미치는 중요변인이며 이러한 영향력은 모두 자신의 지각에 따라 반응한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.10
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• pp.382-392
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• 2017

This study analyzed the effect of an employee's psychological capacity(positive psychological capital), on perceived work overload, and explored how trust in supervisor moderated this relationship. In addition, we examined how positive psychological capital and perceived work overload influenced turnover intention. In doing so, we identified the antecedents of perceived work overload, and suggested ways to nurture positive psychological capital in organizations. Using survey data from 214 employees in the manufacturing industry in Korea, we found that positive psychological capital was negatively related to perceived work overload, and that the relationship was moderated by trust in supervisors. In addition, positive psychological capital was negatively associated while perceived work overload was positively associated with turnover intention. Results suggest the importance of understanding positive psychological capital given its crucial relationship with perceived work overload and turnover intention. The result also emphasizes the role that trust in supervisor plays, and the need to nurture employees' positive psychological capital in organizations.

• Journal of the Korean School Mathematics Society
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• v.26 no.2
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• pp.87-110
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• 2023

This study aimed to proposed repeated reading aloud, which combines repetitive reading and reading aloud, as a method for teaching and learning mathematics. We investigated the effect of repeated reading aloud on students' academic achievement and cognitive load, and explored the implications of repeated reading aloud as a method for teaching and learning mathematics. To this end, we conducted a case study involving repeated reading aloud for two units: the limit of a function and the number of cases. The study targeted four 9th-grade students and four 10th-grade students, analyzing how their academic achievement and cognitive load changed. As a result, the eight students showed positive changes in academic achievement and cognitive load as the repeated reading aloud accumulated. When comparing the units, the academic achievement was lower for the limit of function than the number of cases. In terms of cognitive load, students exhibited higher cognitive load in the unit on the limit of function. When compared cognitive load by grade, there was no significant difference after 3rd repeated reading. However, in both units, the academic achievement of four 10th-grade students was higher than that of four 9th-grade students. Nonetheless, the gap narrowed as the reading aloud was repeated.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.10 no.6
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• pp.9-15
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• 2010

Cognitive radio is a technology, which automatically recognizes and searches for temporally and spatially unused frequency spectrum, then actively determines the communication method, bandwidth, etc. according to the environment, thus utilizing the limited spectrum resources efficiently. In this paper, with the imperfect sensing of misdetection and false alarm, we quantitatively investigate the effects of primary and secondary user's queue on the primary and secondary users' spectrum usage through the analysis of continuous time Markov Chain. With the queue primary user's spectrum usage improved up to 18%, and the secondary user's spectrum usage improved up to 50%.

• The Journal of the Korea Contents Association
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• v.19 no.9
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• pp.101-111
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• 2019

This study was to examine association between working memory and social cognitive ability, and the influence of story-use on social cognitive ability. To this end, this study measured working memory(via n-back), and randomly assigned 82 participants into three groups(5th level intentionality, 3rd-level intentionality, and exposition conditions), and then compared the accuracy of perspective taking and emotion recognition(RMET: Reading Minds in the Eyes Test) as social cognitive ability. The results suggested that perspective taking accuracy was significantly associated with working memory capacity, whereas emotion recognition accuracy was not. Contrary to the hypothesis, perspective taking in the 5th-level intentionality story group were significantly lower than those in the 3rd-level intentionality story group. Emotions recognition accuracy was not significantly different among the three groups. Overall, this study produced inconsistent results, which has been discussed in terms of theory and methods.

• Journal of the HCI Society of Korea
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• v.14 no.2
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• pp.21-29
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• 2019

Take-over requests in semi-autonomous cars must be handled properly in the case of road obstacles or curved roads in order to avoid accidents. In these situations, situation awareness and appropriate decision making are essential for distracted drivers. This study used a driving simulator to investigate the components of auditory-visual information systems that affect safety, workload, and trust. Auditory information consisted of either voice guidance providing situation awareness for the take-over or a beep sound that only alerted the driver. Visual information consisted of either a screen showing how to maneuver the vehicle or only an icon indicating a take-over situation. By providing auditory information that increased situation awareness and visual information that aided decision making, trust and safety increased, while workload decreased. These results suggest that the levels of situation awareness and decision making ability affect trust, safety, and workload for drivers.

• Journal of Information Technology Application
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• v.2 no.1
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• pp.139-160
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• 2000

This paper suggests a technique for evaluating cognitive process when a working group performs its group tasks. First, it review a theory of distributed cognition which provides a theoretical background for investigating group's cognitive process. Then, it presents a procedure for DGOMS(Distributed GOMS) evaluation which is an extension from GOMS. GOMS is an analytica evalutation technique that has been used at the individual level. DGOMS analyzes task completion time and compares workload among group members on the basis of each member's task execution time, communication time, and cognitive workload. DGOMS can be applied to a situation where a group of people are working together for a common goal using a technical subsystem such as information systems.

• Journal of Families and Better Life
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• v.12 no.2
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• pp.1-15
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• 1994

본 연구의 목적은 주부의 취업여부에 따른 가정관리 행동시 스트레스와 가정생활만 족도를 비교.분석하고 관련변인에 따른 차이를 분석하며 가정생활만족도에 영향을 미치는 제반 변인을 고찰하여 주부들의 스트레스를 해소함과 동시에 가정생활의 만족도를 증진시킬 수 있는 방안을 모색하는 데 있다. 본 연구는 예비조사를 거쳐본조사를 실시하였고 설문지는 총 500부를 배부하였으나 응답이 부실기재된 것을 제외한 328부가 분석자료로 사용되었고 모든자료의 분석방법은 SPSS program package를 이용하였다. 본 연구의 중요한 결과를 요 약하면 다음과 같다. 1) 가정관리행동과 스트레스 인지수준은 취업주부가 비취업주부보다 높 게 나타났다. 2)가정생활만족도는 취업주부와 비취업주부간에 유의한 차이를 보이지 않았다. 3)취업주부와 비취업주부의 가정관리행동시 스트레스 인지수준과 가정생활만족도는 의미있는 부적상관을 나타냈다. 4)취업주부와 비취업주부의 가정생활만족도에 가장 큰영향을 미치는 변인은 남편의 지지도로 밝혀졌으며, 이외에 취업주부의 가정생활만족도는 가사노동선호도, 주생활 관리행동시 스트레스에 의하여, 비취업주부의 가정생활만족도는 가사노동선호도, 애정 및 기질 관리 행동시 스트레스, 가사노동에 대한 가치평가에 의하여 영향을 받는 것으로 나타났다.