The Japanese Journal of Ergonomics
Online ISSN : 1884-2844
Print ISSN : 0549-4974
ISSN-L : 0549-4974
Volume 59, Issue 2
Displaying 1-5 of 5 articles from this issue
Editorial
Open data
  • Yunhyeong KOOK, Toshiyuki YAMASHITA, Akira OKAZAKI
    2023 Volume 59 Issue 2 Pages 55-62
    Published: April 15, 2023
    Released on J-STAGE: May 09, 2023
    JOURNAL FREE ACCESS

    For “preparation” which is the “informed consent” to children in hospital, nurses and doctors should know the children’s negative emotions such as anxiety and their senses such as pain, and give effective treatments. Pediatric nursing, however, is often based only on the observations of the children’s actions and behaviors, because the children are not good at expressing their emotions and feelings. Therefore, we have developed a digital emotion expression tool using a body object, as one of preparation tools. The body object is composed of five panels (head, torso, thigh, lower leg, and foot) that have the same ratios as a human body. Children can express their emotions by changing the postures of the body object adjusting the angles between the panels. In order to confirm how to express negative emotions with this tool, we conducted an experiment with 17 adult participants. The results showed that the participants expressed the similar postures with the body object to those taken when they were in the same negative emotions, and suggest that the possibilities of using the body object as one of the preparation tools with which the children can express their emotions in pediatric nursing.

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Original paper
  • Masayuki MATSUBARA, Hiroyuki UMEMURO
    2023 Volume 59 Issue 2 Pages 63-72
    Published: April 15, 2023
    Released on J-STAGE: May 09, 2023
    JOURNAL FREE ACCESS

    The purpose of this study is to investigate the impact of visualizing and sharing information of students’ emotion with teacher on teacher’s performance and self-efficacy in the context of online lectures. Two experiments were conducted in online mock lecture setting where subject cannot see faces of each other. There were two conditions which differed in whether student emotions were visualized and shared with the teacher or not. Performance and self-efficacy of the teacher were measured after each lecture. Results showed that teachers’ self-efficacy was marginally higher in the visualization condition than the non- visualization condition. In particular, the efficacy for instructional strategies subscale, which is a subscale of self-efficacy of teacher, was significantly higher in the condition with visualization than in the condition without visualization. There also found a significant interaction between visualization conditions and subject to teach on self-efficacy score. The results of this study are expected not only to contribute to the improvement of self-efficacy of teachers at online lectures, but also to imply useful guideline for online lecture services.

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Short communication
  • Tomoya TERADA, Yu SHIBUYA, Shogo KAJIMURA
    2023 Volume 59 Issue 2 Pages 73-77
    Published: April 15, 2023
    Released on J-STAGE: May 09, 2023
    JOURNAL FREE ACCESS

    The purpose of this study is to construct a system that allows players to enjoy competitive card games more by presenting the eye gaze of the player who is drawn the card to the player who draws the card at an appropriate granularity, thereby filling in the gaps in game skill between players. As a preliminary step, we classified the tactics that the player who is drawn a card takes when the player has a specific card (Joker), based on the results of eye gaze analysis, which is objective data, and investigated the degree of consistency with the player’s intended tactics through an experiment. In addition, we measured whether the player who draws the card is correct in guessing the Joker based on the external manifestations, mainly the opponent’s eye movement. The results showed that the tactic in which the player who is drawn the card paid most attention to cards other than the Joker or the tactic in which the player paid most attention to the Joker was more likely to be taken in the experiment simulating “Old Maid”. In addition, the tactic in which the player paid the most attention to the Joker allowed the player who draws the card to read the intention and tactics of the player. Based on these results and the results of questions to the participants, we also investigated ways to make the game experience more enjoyable for a larger number of players.

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Technical report
  • Hiroko NOTO, Kanae FUJITA, Nobuko HASHIGUCHI, Hidenori TOGAMI, Koshiro ...
    2023 Volume 59 Issue 2 Pages 78-84
    Published: April 15, 2023
    Released on J-STAGE: May 09, 2023
    JOURNAL FREE ACCESS

    Management and control methods of pressure on body surfaces received from support surfaces are important to improve comfort of those confined to bed or during treatment, reducing the risk of pressure ulcer formation. The purpose of this study is to evaluate the transition of contact pressure received by a patient while repositioning on the bed and the comfort of repositioning techniques, using a measurement system composed of a multi-channel AD converter and a pressure sensor, as well as to verify the effectiveness of the measurement system. Thirteen skilled nurses participated as caregivers, with a healthy female adult playing the role of a patient. Through four conditions of repositioning from supine to right lateral supine, the transition of contact pressure between the patient and the bed was measured and visualized. Compared to the knee-standing posture, the pressure load on the lumbar region was higher with the subjective burden increased when the patient was repositioned from the knee-extended posture. The measurement results suggest that the effect of contact pressure on the patient varies depending on postures before repositioning and repositioning methods, and that the measurement system can distinguish differences in repositioning based on the transition of contact pressure.

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