• 한국노년학
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• 제36권4호
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• pp.1109-1124
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• 2016

본 연구에서는 고정관념 위협이 노인의 공간 기억 및 정서인식기능에 미치는 영향을 확인하고, 개인이 지니고 있는 노화에 대한 인식에 따라 고정관념 위협의 효과가 다르게 나타나는지 검증해 보고자 하였다. 이를 위해 자발적으로 연구 참여 의사를 밝힌 60세 이상 노인 17명(남=7)을 대상으로 연구를 진행하였으며, 첫 번째 방문 시 K-WMS-IV와 MMSE를 포함한 기본 인지기능 검사를 실시하고, 자신의 노화에 대한 인식, 노화 불안, 노화에 대한 태도, 연령 정체성 척도에 응답하도록 하였다. 두 번째 방문 시, 실험군의 경우 노화가 인지기능을 저하시킨다는 스크립트를 읽도록 하여 고정관념 위협에 노출시켰으며, 대조군의 경우 중립적인 스크립트를 읽도록 하였다. 고정관념위협을 조작한 이후 공간 작업기억 과제 (콜시 블록 태핑 과제)와 정서 인식 과제 (얼굴표정 정서인식 과제)를 수행하도록 하고, 수행의 정확도를 관찰하였다. 연구 결과, 고정관념 위협에 노출된 노인 군이 그렇지 않은 노인 군에 비해 정서인식 과제에서 유의하게 저조한 수행 정확도 (p<.05)를 보였다. 또한 자신의 노화에 대한 인식과 고정관념 위협 사이에 상호작용 효과가 확인되어(p<.05), 자신의 노화에 대한 인식이 긍정적인 노인들은 고정관념 위협에 노출되더라도 정서인식 과제와 어려운 공간 작업기억 과제에서 대조군과 유사한 수행 정확도를 보인 반면, 자신의 노화에 대한 인식이 부정적인 노인들은 고정관념 위협에 노출되었을 때, 매우 저조한 수행 정확도를 나타내는 양상을 보였다. 따라서 본 연구에서는 고정관념 위협이 노인의 정서인식 기능에 부정적 영향을 미치는 것을 검증하였으며, 자신의 노화에 대한 긍정적 인식이 고정관념 위협으로 인한 인지기능 저하의 보호 요인으로 작용한다는 것을 확인하였다.

• Nuclear Engineering and Technology
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• 제52권1호
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• pp.78-86
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• 2020

The operation and monitoring (OM) interface is the digital medium between nuclear power system and operators. The cognitive load of OM interface has an important effect on the operation errors made by operator during OM task between operator and computer. The cognitive load model of OM interface is constructed for analysing the composition and influencing factors of OM interface cognitive load. And to study the coping strategies and methods for cognitive load of nuclear power system. An experiment method based on eye movement is proposed to measure the cognitive load of OM interface. Experiment case is carried out with 20 subjects and typical OM interface of a nuclear power system simulator. The OM interface is optimized based on the experiment results. And the results comparison between the original OM interface and the optimized OM interface shows that the cognitive load model and proposed method is valuable contributions in reducing the cognitive load and improving the interaction efficiency of OM tasks.

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2001년도 춘계학술대회 논문집
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• pp.20-25
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• 2001

In recent years, the concern about a user center design in increasing, and it's needed to task a user's visual cognitive characteristics for information presentation. Then this study aims to grasp user's cognitive characteristics about the information presentation by analyzing the fixation points. In the experiment, actually subject operated a copy machine. Recorded the fixation point movement of the operation panel by the eye mark recorder. Analysis examined the screen interface of the operation panel from the field of a fixation point trace. The top down type fixation oder by experience or the context became clear as a result. Furthermore, the difference of the fixation order by skill level was also examined. In this study, it was assumed that to grasp the visual cognitive characteristics becomes the key of efficient information.

• 대한인간공학회지
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• 제21권3호
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• pp.47-58
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• 2002

The similarity of shape of shape of interface between human cognitive map and real product is the important factor to determine the human performance. Nevertheless, the degree of similarity between these has not been defined quantitatively in recent studies. Therefore, in this study, the cognitive map and the mental workload were measured by SMM(Sketch Map Method) and RNASA-TLX(Revision of NASA-Task Load Index). And the numerical expression of the accuracy point was suggested for the quantitative calculation of relative positional similarity between cognitive map and real product. In the experiment, nine subjects were participated and two kinds of vehicles were used. Mental workload was mental workload was measured immediately after the road test. The result of analysis on the relationship between accuracy and mental workload shows that the negative correlation exists on each vehicle, and the lower score of mental workloads id measured on the vehicle that has the higher score of accuracy between two vehicles.

• 한국건설관리학회논문집
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• 제24권6호
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• pp.91-98
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• 2023

Construction accidents result from a combination of factors, including both the actions of workers and the safety conditions on site. Despite advancements in enhancing construction site safety, there remains a gap in comprehending the cognitive processes underlying workers' unsafe behavior. This paper investigates and validates a qualitative model that delves into the potential causes of workers' unsafe actions by examining their cognitive processes, employing a system dynamics approach. By analyzing the interplay of various loops within this model, it offers both short- and long-term safety strategies for managers intent on minimizing unsafe behavior among workers. Specifically, safety managers should prioritize increasing workers' awareness of hazards through education and fostering a positive safety mindset. Moreover, they should task frontline supervisors with directly addressing and rectifying instances of unsafe behavior by workers. Lastly, construction safety managers ought to formulate safety strategies that take into account the cognitive states of workers to mitigate any adverse consequences of biased safety management. The outcomes of this research contribute to our comprehension of methods to enhance hazard perception among workers, curtail unsafe actions, and ultimately reduce construction accidents from a cognitive standpoint.

• 대한산업공학회지
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• 제43권3호
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• pp.176-183
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• 2017

In recent years, studies about multitasking becomes more important. During multitasking, operators can feel frustration when they are interrupted during the task and frustration can affect operator's emotional state and performance. However there is no research on measuring the frustration quantitatively in multitasking environment. In this paper, we suggested quantitative measurement of frustration during multitasking. In order to measure the frustration, we made a mathematical representation with emotional decay model and the initial intensity of frustration based on cognitive closure theory. The amount of initial intensity could be represented as the ratio of actual remaining time to expected remaining time. By the experiment, we measured the frustration during the experiment and compared this values with values of frustration dimension of NASA-TLX. Finally we got the linear regression model with a good accuracy ($R^2=0.986$). This study contributes to measuring the emotion quantitatively by the relation of expected and actual remaining time in multitasking environment.

• 한국인지과학회:학술대회논문집
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• 한국인지과학회 2006년도 춘계학술대회
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• pp.33-37
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• 2006

본 논문은 어휘판단과제(LDT: Lexical Decision Task)시 나타나는 여러 언어현상 중 단어빈도효과(word frequency effect)와 단어유사성효과(word similarity effect)를 한국어에 적용시켜 인간과 계산주의적 모델을 통해 실험하고, 결과를 비교하였다. 실험결과 인간과 계산주의적 모델 각각 한국어에 대해 단어빈도효과와 단어 유사성효과를 보였으며, 인간의 실험결과와 계산주의적 모델의 결과가 유의미한 유사성을 나타내었다.

• 대한인간공학회지
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• 제32권1호
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• pp.1-7
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• 2013

Objective: This study proposes the application of Ecological Interface Design(EID) method that is effective for situation awareness in digitalized environment. Background: While cognitive interface design method such as Information Rich Display(IRD) is simply focused on existing information for user, EID method helps users' resource to be solved to higher ion task such as diagnostic and problem solving. Method: Using EID method based on Work Domain Analysis (WDA), it was analyzed and designed for Steam Generator(SG) Water Level control process in a digitalized Main Control Room of Nuclear Power Plant. Proposed EID example is evaluated through interviews by expert & operator. Results: The result of expert & operator showed that EID display might give an aid for operator's decision. Conclusion: The results can reduce critical accidental damage that occurred due to cognitive load and so critical human error. Application: This study may be impact on situation awareness study for digitalized interface design.

• International Journal of Contents
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• 제6권3호
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• pp.83-88
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• 2010

Aerobic exercise affects cerebral circulation, action of neurotransmitters, glucose, oxygen, and energetic substances and influence on the central nervous system for cognition. This study suggests that both the intensity of exercise and the level of cognitive task need to be considered. Computerized neurobehavioral testing is a more effective method, compared to conventional methods, of neuropsychological testing when measuring cognition objectively, in cases that we found. The intensity of 80% max HR had effect on more complex tasks such as 3 Digit Addition and Digit Span Backward, and the intensity of 65% max HR had an effect on more simple tasks such as Color Word Vigilance and Digit Span Forward. We can assume that different intensity of aerobic exercise might involve specific areas of the brain as they could have different sensitivities, so further studies measuring regional cerebral blood flow or electroencephalogram are needed to confirm the results.

• 말소리와 음성과학
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• 제4권2호
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• pp.135-143
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• 2012

Discourse is regarded as an important component of communication assessment, but studies about the discourse characteristics of the elderly are scant. The purpose of this study was to confirm the effects of aging, gender, and educational level on discourse in elderly people with normal cognitive function. Forty normal elderly and forty young people participated in this study. A picture description task (Boston Cookie-Theft picture) was used to examine discourse function. The description task was analyzed for both productivity (total number of sentences, total number of syllables, and syllables per sentence) and semantics (CIU ratio). The results were as follows: 1) Only CIU ratio differed significantly according to age. 2) In the total number of syllables and syllables per sentence, females demonstrate a higher number than males. 3) The CIU ratio differed significantly according to educational level. These results suggest that impairment of communicative function is an aspect of cognitive impairment that can be related to aging. Also, discourse performance in the elderly is associated with their gender and educational level.