• Science of Emotion and Sensibility
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• v.13 no.1
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• pp.69-78
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• 2010

LED technology offers versatile lighting control while having a very low environmental impact. Consequently, increasing attention is being paid to the emotional impact of LED lighting. This study investigated whether the chromacity of LED lighting influences people's time perception. To this end, two empirical studies were conducted: First, in experiment I(N=28), the subjects compared their perception of the time duration, which was varied from 3s to 20s, for 6 chromatically nuanced lighting conditions, respectively, with that under a daylight condition. The results showed that, in warm-color nuanced lighting conditions, the subjects perceived time to pass more slowly than in the daylight condition. On the contrary, in cool-color nuanced lighting conditions, the subjects perceived time to pass more rapidly than in the daylight condition. Then, in experiment II(N=39), the subjects were asked to count for 90 seconds while simultaneously performing some cognitive tasks. Confirming the results found in experiment I, the subjects perceived time to pass more rapidly in cool-color nuanced lighting conditions than in warm-color nuanced lighting conditions, although the difference was not statistically significant(p>0.05). In addition, the subjects tended to perceive the time to be shorter when the nuanced color of the light was closer to their preferred color.

• Journal of Korea Entertainment Industry Association
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• v.15 no.7
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• pp.215-223
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• 2021

The purpose of this study is to investigate the effect of computerized cognitive therapy on cognitive function and Instrumental Activities of Daily Living for elderly people with mild cognitive impairment living in the community. 22 MCI elderly people were randomly assigned to 11 experimental group and 11 control group. For a total of 10 weeks, 3 times a week, 30 minutes per session, the experimental group received CoTras and the control group received traditional cognitive rehabilitation. Neurobehavioral Cognitive Status Examination(NCSE) and Korean Instrumental Activities of Daily Living(K-IADL) were used to investigate the changes in cognitive function and performance of instrumental activities of daily living before and after the intervention. As a result of the study, the experimental group showed improvement in overall cognitive function, including attention and memory, and performance in IADL. The use of CoTras may be considered to improve cognitive function and performance of instrumental activities of daily living for the elderly with mild cognitive impairment in the community.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.14 no.5
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• pp.999-1011
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• 1994

Driving maneuvers in car-following are affected not only by the factors related to road and traffic conditions, but also by factors related to drivers' cognition to them. This paper attempts to analyse drivers' car-following distance tests on road characteristics. Driving maneuvers are directly observed by video recorder sets in the vehicle. At the same time drivers are interviewed about their cognitive degree of car-following distance according to a given level of cognitive language. As a result, linguistical cognition of car-following distance is well fitted in with Weber-Fechner's law. This paper suggests a modeling method that takes into account the driver's cognition for acquiring traffic visible information on driving maneuver.

• The Journal of the Convergence on Culture Technology
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• v.4 no.4
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• pp.95-100
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• 2018

The purpose of this study was to investigate the effects of cognitive programs on cognitive function improvement in patients with mild dementia. The subjects were 30 patients with mild dementia. The subjects were applied the cognitive rehabilitation program three times a week for 6 weeks and analyzed the pre-experiment and post-experiment values through the Korean simplified mental state examination (MMSE-K). The results were as follows: The mean of test was increased and statistically significant. Thus, cognitive rehabilitation programs for patients with mild dementia are effective interventions to improve cognitive function in patients with dementia.

• Journal of Korea Entertainment Industry Association
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• v.15 no.1
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• pp.229-236
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• 2021

The purpose of this study is to investigate how the combined intervention of occupation-based intervention and computerized cognitive rehabilitation treatment affects the psychosocial function, cognitive function, and depression of stroke patients. 23 stroke patients were divided into experimental group(n=11) and a control group(n=12), and the experimental group and the control group received CoTras for 4 weeks and 30 minutes each, and additionally the experimental group received task-based intervention for 30 minutes before the start of CoTras. It was conducted 20 times for a total of 4 weeks. Self-efficacy scale, stress scale, depression scale, neurobehavioral cognitive status examination were used. As a result of the study, the experimental group showed significant improvement in improvement of self-efficacy, stress, and depression than the control group, and the experimental group showed a small effect difference in magnitude of effect from the control group in cognitive function. Based on this study, it is possible to utilize the simultaneous task-based intervention with CoTras to improve psychosocial function, depression and cognitive function in stroke patients.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.4
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• pp.311-319
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• 2019

The purpose of this study was to evaluate the effects of a computerized cognitive training(CCT) on cognitive, depression, life satisfaction and activity of daily living in older adults with mild dementia. The participants were 32 older adults diagnosed with mild dementia who reside in nursing hospital and were randomly divided into an 16 for an experimental group and 16 for a control group. A CCT was performed for a day/week for 8 weeks in an experimental group. The CoTras-G was used for CCT. The MMSE-K, SGDS-K, ELS and BI were administered to the experimental group and the control group in the same way in order to examine the effects of CCT. The difference of the effects between before and after a CCT conduction were identified by paired t-test. Moreover, the Mann-Whitney U-test was conducted to identify differences in variances between groups. Only participants in the experimental group reported significant improvements in cognitive function, depression, life satisfaction and activity of daily living when compared to those in the control group after CCT. There was a significant difference in cognitive function, depression, life satisfaction and activity of daily living between the experimental group and the control group after CCT. These findings suggest that the CCT can be used as effective cognitive training program to improve cognitive function, depression, life satisfaction and activity of daily living in older adults with mild dementia.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.21 no.4
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• pp.31-36
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• 2021

Colour properties can be classified based on hue, brightness, and saturation, and the characteristics of colour perception vary by colour property. In terms of colour perception, surrounding colours are viewed together rather than independently, and the characteristics of the original colour perception may vary depending on the colour characteristics of the surrounding. Thus far, research on colour perception and sensibility has focused on a monotonic environment, which is different from colour perception in real life. As such, a fundamental study on colour perception considering surrounding colours must be conducted. In this study, a psychophysical experiment was conducted, and the results were analysed to study the colour perception characteristics by edge brightness, Edge brightness was set as a variable based on the visual traits that are most sensitive to brightness, and the experiment was conducted using the Munsell colour system to specify the stimulus colour. Based on the analysis of the experimental outcomes, this study reveals the significance of fundamental research data on the visual and perceptual characteristics of colour perception with regard to edge brightness and provides directions for future research.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1992.04b
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• pp.573-580
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• 1992

인공건물의 평면특성에 대한 시각을 통한 인지를 청각으로 대체했을 경우의 인지능력을 측정하였다. 정상적으로 시각(visual)을 이용하겠으나, 시각 장애자의 경우는 청각(auditory) 또는 촉각(tactile) 또는 두가지 모두를 사용하게 된다. Psychophysical approach를 사용하여 모의평면에 대한 인지능력을 JND단위로 측정하였다. 청각적인 신호를 관찰자에게 제공하기 위해 전자장치(electronic ranging device)가 고안되었다. 이 장치는 목표물까지의 거리를 초음파의 이동시간으로 측정하여 음의세기(sound level)로 발생시켜 준다. 관찰자는 이 음의 세기를 듣고 거리를 추정하고 물표의 방향은 이 장비를 쥔 손의 방향, 즉, proprioceptive cue를 이용하게 된다. 세가지 task에 대한 실험은 평면의 slantness, 두 평면이 교차하는 모서리의 크기, 두 평면사이의 공간(aperture size)등에 대한 인지능력의 측정실험이다. 실험결과를 보면, 관찰자는 시각신호 대신에 청각신호를 사용할 수 있는 능력이 있는 것으로 나타났다. 세가지 task별 JND측정치는 slant angle 6도, 모서리의 concavity 10도, angular aperature size 3-5도로 나타났다. 이 결과는 정상인이 시각을 이용한 인지능력과 큰 차이가 없음을 보여주고 있다.

• Proceedings of the Acoustical Society of Korea Conference
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• 1998.06c
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• pp.399-402
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• 1998

영어에서 자음의 유.무성 대립이 선행모음에 미치는 영향은 다른 여느 언어에서보다 두드러지게 커서 언어 보편적이기보다는 영어 특유의 음운현상으로 보는 견해가 주류를 이루고 있다. 본 연구에서는 영어를 학습하고 있는 한국어 화자들이 영어특유의 이 현상을 어떻게 인지하여 실현하고 있는지를 발성실험을 통하여 알아보고 더 나아가 모음길이가 후행자음의 유.무성 인지에 어떤 실마리로 작용하는지 인지실험을 통하여 알아보았다.

• Journal of Society of Occupational Therapy for the Aged and Dementia
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• v.12 no.2
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• pp.75-85
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• 2018

Objective : The purpose of this study aimed to find out about the impact of RAPAEL Smart Glove on cognitive function and Daily living. Method : While 15 experimental group was given 'RAPAEL Smart Glove', 15 control group was given traditional cognitive rehabilitation. LOTCA, NCSE and MBI were taken to assess cognitive function and activities of daily living of two group before and after each intervention. Result : Cognitive function and Activities of Daily Living of both experimental group and control group presented statistically significant difference before and after each intervention(p<.05). But Statistically, the experiment group presented a significant improvement. Conclusion : The result of this study indicates that the existing rehabilitation treatment and 'RAPAEL Smart Glove' together can produce good effect on cognitive function and activities of Daily Living of mild cognitive impairment patient.