• Title/Summary/Keyword: 기억문제

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The Effect of Emotional Expression Change, Delay, and Background at Retrieval on Face Recognition (얼굴자극의 검사단계 표정변화와 검사 지연시간, 자극배경이 얼굴재인에 미치는 효과)

  • Youngshin Park
    • Korean Journal of Culture and Social Issue
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    • v.20 no.4
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    • pp.347-364
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    • 2014
  • The present study was conducted to investigate how emotional expression change, test delay, and background influence on face recognition. In experiment 1, participants were presented with negative faces at study phase and administered for standard old-new recognition test including targets of negative and neutral expression for the same faces. In experiment 2, participants were studied negative faces and tested by old-new face recognition test with targets of negative and positive faces. In experiment 3, participants were presented with neutral faces at study phase and had to identify the same faces with no regard for negative and neutral expression at face recognition test. In all three experiments, participants were assigned into either immediate test or delay test, and target faces were presented in both white and black background. Results of experiments 1 and 2 indicated higher rates for negative faces than neutral or positive faces. Facial expression consistency enhanced face recognition memory. In experiment 3, the superiority of facial expression consistency were demonstrated by higher rates for neutral faces at recognition test. If facial expressions were consistent across encoding and retrieval, memory performance on face recognition were enhanced in all three experiments. And the effect of facial expression change have different effects on background conditions. The findings suggest that facial expression change make face identification hard, and time and background also affect on face recognition.

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Misinformation Effect and the type of information: A Comparison of Korean and American Sample (오정보 효과와 정보의 유형: 한국인과 미국인의 비교)

  • Yuhwa Han
    • Korean Journal of Culture and Social Issue
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    • v.25 no.2
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    • pp.157-177
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    • 2019
  • In Study 1, the author translated the material which is modified by Han(2017) and allows researchers to examine misinformation effect about background (temporal structure of event) and object information. Eighty-five Korean participants were participated in Study 1 and tested their memory after misled by temporal and object post-event information about a story. The translated material could produce misinformation effect in both types of information. In Study 2, a 3-way ANOVA was conducted with combined data collected from Korea and the U.S to test the effects of three IVs (whether misled or not, the type of information and the nationality of the participants) on memory after misled by temporal and object information. As results, the main effects of all three IVs, the 2-way interaction effect of whether misled or not and the type of information, and the 3-way interaction effect of all the three IVs were statistically significant. In sum, the higher accuracy rate was obtained when the participants were not misled, and they were more accurate about the information about object. Americans tended to be more accurate. The misinformation effect was larger when the participants were misled by object information. The 2-way interaction effect was found only in the Korean sample. In the discussion, the implication of the current study was discussed.

College Students' Re-Acculturation to their "Home" Country: Focusing on their Cultural Identity (해외거주 귀국 대학생들의 "모국" 문화재적응: 문화정체성을 중심으로)

  • Ansuk Jeong;Kyung Ja Oh;Seojin Oh;Curie Park
    • Korean Journal of Culture and Social Issue
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    • v.21 no.1
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    • pp.1-20
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    • 2015
  • Among the cultural groups that increase South Korea's diversity, there are adolescents returning to Korea after their stay abroad. From 15 in-depth interviews with those who stayed abroad for longer than 5 years, 11 codes were generated. The codes were divided into two categories: "assets" when the multicultural experience served as resources for the returnees adapting to Korean culture successfully and "disadvantages" when the multiple experience remained fragmented for the returnees experiencing difficulty in re-acculturation. The distinguishing factors between the success and difficulty in re-acculturation appeared to be the cultural identity as Korean and the "openness to experience." The interwoven nature of personal and social factors stood out, along with the role of cultural identity throughout the process. Also the "openness to experience" as a strategy of integrating the past experiences is discussed, as well as the implications of the findings and the suggestions for future studies in the contemporary multicultural South Korea as a host society.

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North Korean Defectors' depression through the CES-D and the Rorschach test (CES-D와 로샤검사를 통해 본 북한이탈주민의 우울감)

  • Jong-Nam Kim;Yun-Kyung Choi;Jung-Min Chae
    • Korean Journal of Culture and Social Issue
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    • v.14 no.2
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    • pp.41-61
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    • 2008
  • This study was performed to investigate the North Korean defectors's depression through the CES-D and a projective test simultaneously. So 40 North Korean defectors and 40 South Koreans participated in this study. The results are the following. First, the North Korean defectors demonstrated more higher CES-D scores than the South Koreans, while there were not significant differences in the Rorschach depression-related indexes, DEPI, CDI, S-CON between two groups. Second, at the analysis of the sex difference effect, women among the North Korean defectors showed the most high CDI index scores. In addition, we analyzed the mean differences between two groups for morbid content, shading response, achromatic response, human movement response, form dimension response, Lamda, and the number of total response. However, there are not significant differences between two groups for those variables, except for form dimension(FD) response. It suggested the probability that the North Korean women defectors could experience more psychological distress underlyingly than the North Korean men defectors. Third, most importantly, the correlation between CES-D and DEPI in the Rorschach test was significantly different in the two groups(the North Korean defectors and the South Koreans). In conclusion, the self-report of the North Korean defectors on depression could be exaggerated. So we should be cautious to interpret the self report results of the North Korean defectors.

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The Usability Evaluation of Kiosks for Individuals with Low Vision (저시력 시각장애인의 키오스크 사용성 평가 연구)

  • Kyounghoon Kim;Yumi Kim;Sumin Baeck;Jeong Hyeun Ko
    • Journal of the Korean Society for information Management
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    • v.41 no.3
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    • pp.331-358
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    • 2024
  • In the rapid digital transformation era, kiosks have become a common element in daily life. However, their widespread deployment has introduced new challenges for socially marginalized groups, including individuals with disabilities and the elderly. This study aims to evaluate the usability of kiosks for individuals with low vision and propose improvement strategies. The study was conducted with eight low-vision university students from A University in Gyeongsangbuk-do and four non-disabled university students from Daegu. Usability was assessed through experiments involving a self-service certificate issuance kiosk and a fast-food restaurant kiosk, using Jakob Nielsen's five usability evaluation criteria: learnability, efficiency, memorability, error prevention, and satisfaction. The results revealed that individuals with low vision faced significant difficulties with small text size, low contrast, no physical buttons, and lack of screen zoom functionality. To address these issues, the study recommends enhancements such as increasing text size and contrast, incorporating physical buttons, adding zoom functionality, ensuring consistent UI design, and providing auditory feedback. This study provides foundational data for enhancing information accessibility for individuals with low vision. It offers critical insights into kiosk design and policy recommendations, thereby contributing to the mitigation of the digital divide.

The Effect and Disturbance Factors of Practical-Based Teacher Education Program for the Development of TPACK in Pre-service Chemistry Teachers (예비화학교사의 TPACK 발달을 위한 실천기반 교사교육 프로그램의 효과 및 방해 요인 분석)

  • Jung, Mi Sun;Paik, Seoung-Hey
    • Journal of the Korean Chemical Society
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    • v.66 no.4
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    • pp.305-322
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    • 2022
  • In this study, a practice-based teacher education program was developed and applied to improve the TPACK of pre-service chemistry teachers. Also the program effect and obstacles were confirmed by measuring the development of TPACK. The participants of this study were 20 pre-service chemistry teachers of 3rd grade and 2 pre-service chemistry teachers of 4th grade who took chemistry education courses at K University located in Chungcheongbuk Province. The developed teacher education program consisted of four stages: preparation, rehearsal, practice, and reflection. The feedbacks from researchers and colleagues pre-service teachers were provided in preparation, rehearsal, and reflection stages. As a result of the study, the program of this study did not show an educational effect in the "constructive learning activities" of preservice teachers, but it was found to have an educational effect in "problem solving". In other words, in "constructive learning activity", most pre-service teachers were at 0 level before and after the program. The pre-service teachers designed the class to unilaterally provide technology to simply use it as a tool to explain subject content or revise misconceptions, and learners can passively acquire knowledge. However, in the case of "problem solving", the pre-service teachers who were at level 0 before the educational program changed to level 1. Before the program, the pre-service teachers designed classes to solve problems by memory without using technology, but after the program they planned classes that provides opportunities to approach and solve various problems through the technology presented by the teacher. However, there were not many pre-service teachers corresponding to level 2, which constitutes voluntary learning in which learners use technology to solve various problems while selecting and variously manipulating technology. In addition, as obstacles to the TPACK development of pre-service chemistry teachers, there were external factors such as lack of classroom support environment for TPACK implementation, lack of time for education planning, and inadequate technology competency. And there were internal factors such as perspectives of traditional education and negative attitude toward technology. In particular, the proportion of pre-service teachers who preceived inappropriate technical competency as an external obstacles of TPACK development was high. Therefore, it was necessary to develop an education program corresponding to type 2 or type 3 that enables TPACK development through TK for pre-service teachers.

Feasibility of Deep Learning Algorithms for Binary Classification Problems (이진 분류문제에서의 딥러닝 알고리즘의 활용 가능성 평가)

  • Kim, Kitae;Lee, Bomi;Kim, Jong Woo
    • Journal of Intelligence and Information Systems
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    • v.23 no.1
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    • pp.95-108
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    • 2017
  • Recently, AlphaGo which is Bakuk (Go) artificial intelligence program by Google DeepMind, had a huge victory against Lee Sedol. Many people thought that machines would not be able to win a man in Go games because the number of paths to make a one move is more than the number of atoms in the universe unlike chess, but the result was the opposite to what people predicted. After the match, artificial intelligence technology was focused as a core technology of the fourth industrial revolution and attracted attentions from various application domains. Especially, deep learning technique have been attracted as a core artificial intelligence technology used in the AlphaGo algorithm. The deep learning technique is already being applied to many problems. Especially, it shows good performance in image recognition field. In addition, it shows good performance in high dimensional data area such as voice, image and natural language, which was difficult to get good performance using existing machine learning techniques. However, in contrast, it is difficult to find deep leaning researches on traditional business data and structured data analysis. In this study, we tried to find out whether the deep learning techniques have been studied so far can be used not only for the recognition of high dimensional data but also for the binary classification problem of traditional business data analysis such as customer churn analysis, marketing response prediction, and default prediction. And we compare the performance of the deep learning techniques with that of traditional artificial neural network models. The experimental data in the paper is the telemarketing response data of a bank in Portugal. It has input variables such as age, occupation, loan status, and the number of previous telemarketing and has a binary target variable that records whether the customer intends to open an account or not. In this study, to evaluate the possibility of utilization of deep learning algorithms and techniques in binary classification problem, we compared the performance of various models using CNN, LSTM algorithm and dropout, which are widely used algorithms and techniques in deep learning, with that of MLP models which is a traditional artificial neural network model. However, since all the network design alternatives can not be tested due to the nature of the artificial neural network, the experiment was conducted based on restricted settings on the number of hidden layers, the number of neurons in the hidden layer, the number of output data (filters), and the application conditions of the dropout technique. The F1 Score was used to evaluate the performance of models to show how well the models work to classify the interesting class instead of the overall accuracy. The detail methods for applying each deep learning technique in the experiment is as follows. The CNN algorithm is a method that reads adjacent values from a specific value and recognizes the features, but it does not matter how close the distance of each business data field is because each field is usually independent. In this experiment, we set the filter size of the CNN algorithm as the number of fields to learn the whole characteristics of the data at once, and added a hidden layer to make decision based on the additional features. For the model having two LSTM layers, the input direction of the second layer is put in reversed position with first layer in order to reduce the influence from the position of each field. In the case of the dropout technique, we set the neurons to disappear with a probability of 0.5 for each hidden layer. The experimental results show that the predicted model with the highest F1 score was the CNN model using the dropout technique, and the next best model was the MLP model with two hidden layers using the dropout technique. In this study, we were able to get some findings as the experiment had proceeded. First, models using dropout techniques have a slightly more conservative prediction than those without dropout techniques, and it generally shows better performance in classification. Second, CNN models show better classification performance than MLP models. This is interesting because it has shown good performance in binary classification problems which it rarely have been applied to, as well as in the fields where it's effectiveness has been proven. Third, the LSTM algorithm seems to be unsuitable for binary classification problems because the training time is too long compared to the performance improvement. From these results, we can confirm that some of the deep learning algorithms can be applied to solve business binary classification problems.

Research about feature selection that use heuristic function (휴리스틱 함수를 이용한 feature selection에 관한 연구)

  • Hong, Seok-Mi;Jung, Kyung-Sook;Chung, Tae-Choong
    • The KIPS Transactions:PartB
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    • v.10B no.3
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    • pp.281-286
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    • 2003
  • A large number of features are collected for problem solving in real life, but to utilize ail the features collected would be difficult. It is not so easy to collect of correct data about all features. In case it takes advantage of all collected data to learn, complicated learning model is created and good performance result can't get. Also exist interrelationships or hierarchical relations among the features. We can reduce feature's number analyzing relation among the features using heuristic knowledge or statistical method. Heuristic technique refers to learning through repetitive trial and errors and experience. Experts can approach to relevant problem domain through opinion collection process by experience. These properties can be utilized to reduce the number of feature used in learning. Experts generate a new feature (highly abstract) using raw data. This paper describes machine learning model that reduce the number of features used in learning using heuristic function and use abstracted feature by neural network's input value. We have applied this model to the win/lose prediction in pro-baseball games. The result shows the model mixing two techniques not only reduces the complexity of the neural network model but also significantly improves the classification accuracy than when neural network and heuristic model are used separately.

A Proposal for Archives securing Community Memory The Achievements and Limitations of GPH Archives (공동체의 기억을 담는 아카이브를 지향하며 20세기민중생활사연구단 아카이브의 성과와 과제)

  • Kim, Joo-Kwan
    • The Korean Journal of Archival Studies
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    • no.33
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    • pp.85-112
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    • 2012
  • Group for the People without History(GPH) was launched at September 2002 and had worked for around five years with the following purposes; Firstly, GPH collects first-hand data on people's everyday lives based on fieldworks. Secondly, GPH constructs digital archives of the collected data. Thirdly, GPH guarantees the accessibility to the archives for people. And lastly, GPH promotes users to utilize the archived data for the various levels. GPH has influenced on the construction of archives on everyday life history as well as the research areas such as anthropology and social history. What is important is that GPH tried to construct digital archives even before the awareness on archives was not widely spreaded in Korea other than formal sectors. Furthermore, the GPH archives proposed a model of open archives which encouraged the people's participation in and utilization of the archives. GPH also showed the ways in which archived data were used. It had published forty seven books of people's life histories and five photographic books, and held six photographic exhibitions on the basis of the archived data. Though GPH archives had contributed to the ignition of the discussions on archives in various areas as leading civilian archives, it has a few limitations. The most important problem is that the data are vanishing too fast for researchers to collect. It is impossible for researchers to collect the whole data. Secondly, the physical space and hardware for the data storage should be ensured. One of the alternatives to solve the problems revealed in the works of GPH is to construct community archives. Community archives are decentralized archives run by people themselves to preserve their own voices and history. It will guarantee the democratization of archives.

A Study on the Enjoyment Modes of Classic Novels·Ga-Sa in Cheongsong of the Middle of the-20th Century (20세기 중반 청송 지역의 고전소설·가사의 향유 양상)

  • Kwon, Mi-sook
    • Journal of Korean Classical Literature and Education
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    • no.33
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    • pp.211-253
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    • 2016
  • Depending on the class and status, literary works are variously accepted and interpreted. As a result, they show different forms and ways of enjoying the novels and different variations of a text. The only ideal way of investigating and analyzting it is to meet someone who actually lived in that era. This study tries to investigate the enjoying aspects of the classic Korean classical novels by studying how the classical novels have been enjoyed in Northern Gyeong-Buk Area, especially in Cheongsong. It is a follow-up study of cases studies based in Yeongdeok, Uljin. As a result, one can come true the conclusions. In the case of Cheongsong, the Northern Area and Southern Areas show differences in their modes enjoying the Korean classical novels. The Northern Area has a strong expresses self-confidence and pride, and forms solid enjoying groups. However I could hardly find any such cases in the Southern Area. And the entertaining aspects of the classical novels are enjoyed by individuals rather than entertainers. It shows that there have been many difficulties in the culture of in taking-root classical novels as a firm ludic culture in Cheongsong. Furthermore, this survey can identify a duality of entertainers genres conception to enjoying Ga-sa and classic the Korean classical novels. The entertainers who haves read only the classical novels has not hidden ashamed of themselves as readers and entertainersof them. But the entertainers who are proud of the self as enjoyers of Ga-sa tried to dissimulate hide the fact that they read of the classical novels, because they think that a narrativity and fictitiousness, incredibility of the novels are disproportionate inappropriate to their for dignity as members of Yangban(兩班) families, and are in stark contrast to the morality and seriousness of Ga-sa.