著者

加藤 優貴 長町 和弥 杉本 麻樹 稲見 昌彦 北崎 充晃

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.26, no.1, pp.22-31, 2021 (Released:2021-04-01)

参考文献数

28

---

Pseudo physical contact is used for communication in virtual environments such as VRChat. We hypothesized that the pseudo physical contact could affect interpersonal impression and communication, and the interpersonal impression would be modulated by appearance of body or avatar type. To test these hypotheses, we performed a questionnaire survey for VRChat users (N=341). In results, interpersonal impression and communication difficulty were improved after the pseudo physical contact, but the avatar type did not modulate the interpersonal impression. These results suggest that the pseudo physical contact could improve the interpersonal impression and communication in virtual environments.

著者

北崎 充晃

出版者

一般社団法人 日本ロボット学会

雑誌

日本ロボット学会誌 (ISSN:02891824)

巻号頁・発行日

vol.39, no.8, pp.701-707, 2021 (Released:2021-10-23)

参考文献数

40

著者

近藤 亮太 上田 祥代 杉本 麻樹 南澤 孝太 稲見 昌彦 北崎 充晃

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.24, no.4, pp.351-360, 2019 (Released:2019-12-31)

参考文献数

28

---

We feel as if a fake body is our own body by synchronicity between the fake body and the real body (illusory body ownership). The illusory body ownership can be induced to an invisible full body via the synchronous movement of only the hands and feet. We aimed to investigate whether the illusory ownership occurs to a virtual body with an elongated arm by changing position of the one of the hands, and it changes reaching behavior and/or postural stability. We found that the illusory body ownership was induced to the transformed body by synchronous movement of the hands and feet. Participants’ reaching behavior gradually changed to use the longer arm more than the normal arm during learning of the transformed body within 10 min. Postural stability did not change. These results suggest that we can have illusory ownership of the transformed body with the elongated arm, and our behavior adaptively changes to utilize the new body.

著者

中川 航太朗 井上 康之 Harin Hapuarachchi 杉本 麻樹 稲見 昌彦 北崎 充晃

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.27, no.4, pp.341-351, 2022-12-28 (Released:2022-12-28)

参考文献数

45

---

We aimed to investigate whether illusory embodiment occurs in arms that stretch farther than usual arms in a virtual environment and how embodiment is acquired in different stretching methods. We realized three types of arm stretching methods: the hand extended ten times the actual movement (constant stretching), the hand extended in an accelerated manner (accelerated stretching), and the hand immediately extended to the target when the user fixed the eyes on the target and moved the hand towards the target (instant stretching). Then, we investigated sense of body ownership, sense of agency and task performance for those. We found that the illusory body ownership and sense of agency were higher in the order of constant stretching, accelerated stretching, and instant stretching. The learning effects on embodiment depended on the stretching method. Task performance was better in the order of constant, instant, and accelerated stretching. These results suggest that the illusory embodiment of the stretching arm and its learning depend on the type of stretching.

著者

.企画代表者(Representative Organizer):山本 哲也 企画者(Organizer):横谷 謙次 話題提供者(Speaker):山本 哲也 横谷 謙次 坂田 陽子 北崎 充晃 指定討論者(Discussant):国里 愛彦 司会者(Chair):山本 哲也 横谷 謙次

雑誌

日本心理学会第86回大会

巻号頁・発行日

2022-07-29

著者

石本 浩気 加藤 優貴 北崎 充晃

出版者

日本基礎心理学会

雑誌

基礎心理学研究 (ISSN:02877651)

巻号頁・発行日

pp.40.21, (Released:2022-04-12)

参考文献数

58

---

The COVID-19 pandemic has placed significant restrictions on experiments such as those using motion capture suits in the laboratory. On the other hand, the number of users of virtual reality (VR) social network services has been increasing due to the pandemic. Thus, we constructed a laboratory in VRChat, one of the VR social network services, where full-body ownership experiments can be conducted, and validated it. The subjects entered the experimental world in VRChat, changed into the experimental avatar, and participated in the experiment. The subject’s movements and the avatar were synchronized or asynchronized with 1-s delay. After 5-min ball reaching using the avatar, subjective evaluations were made regarding senses of body ownership, agency, and pseudo-haptics. In the synchronous condition, we obtained a stronger sense of body ownership, agency, and pseudo-haptic sensation than in the asynchronous condition, reproducing the results of previous studies. These results suggest that the laboratory in the public VR social network enables us to manipulate experimental conditions, and perform experiments on full-body illusion.

著者

佐々木 智也 フェルナンド チャリス 南澤 孝太 北崎 充晃 稲見 昌彦

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

第21回日本バーチャルリアリティ学会大会

巻号頁・発行日

2016-09-09

著者

北崎 充晃

出版者

心理学評論刊行会

雑誌

心理学評論 (ISSN:03861058)

巻号頁・発行日

vol.61, no.3, pp.379-383, 2018 (Released:2020-01-18)

参考文献数

12

---

The main question of this article is whether joint actions between human and nonhuman agents enhance their performance and enable the emergence of joint agency. The findings of behavioral and physiological responses on virtual characters and robots, and the findings on joint actions between humans and robots, based on cognitive models, suggest that the interaction between human and nonhuman agents with goal sharing, action synchronicity, and online interaction could elicit a phenomenon that is similar to that seen in interactions between humans. In a future society in which humans and nonhuman agents live together, it is necessary to investigate how to design their interactions appropriately to contribute to the emergence of wisdom in the society.

著者

北崎 充晃

出版者

心理学評論刊行会

雑誌

心理学評論 (ISSN:03861058)

巻号頁・発行日

vol.59, no.3, pp.312-323, 2016 (Released:2018-02-06)

参考文献数

57

---

I aim to implement ‘we-mode’ in cyberspace by connecting several physical spaces. The we-mode is a special cognitive mode to intimately cooperate with others, and enhance human cognitive abilities and behavioral performances beyond the individual’s ability and performance. Studies on self-body perception, illusory body-ownership (e.g. rubber hand illusion, out-of-body experience, virtual embodiment), social interactions with others (e.g. Mutual gaze), changing one’s own body image, and its social and psychological impacts in cyberspace using virtual reality technologies as well as in physical space are reviewed. Based on those findings I consider how to induce or create we-mode in cyberspace and what can be realized by the cyberspace we-mode compared with the physical-space we-mode.

著者

上田 祥代 吉田 成朗 渡邊 淳司 池田 まさみ 茅原 拓朗 北崎 充晃

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.24, no.1, pp.3-12, 2019 (Released:2019-03-31)

参考文献数

30

被引用文献数

1

---

The human primary somatosensory cortex corresponds to an organized topological map of all body parts (somatotopy). However, the representative proportion of body parts in the brain differs from that of the physical body. This distorted representation is called the cortical homunculus. Body parts with extensive cortical representation have a greater sensitivity in spatial resolution. We have developed the software, Face Homunculus Viewer, that can modify any facial images to homunculus-like faces with sensitivity parameters. The software was employed to support children and adults in understanding the cortical homunculus and the sensitivity differences of various body parts. Several workshops were held in which participants measured two-point discrimination thresholds at the forearm, lip and forehead to create a personalized homunculus. The software may contribute to user knowledge on the mechanisms of somatosensory perception in the brain of humans through their own embodied experience.

著者

東山 薫 IMUTA Kana SLAUGHTER Virginia 北崎 充晃 板倉 昭二

出版者

一般社団法人電子情報通信学会

雑誌

電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 (ISSN:09135685)

巻号頁・発行日

vol.114, no.440, pp.103-107, 2015-01-30

---

心の理論研究は,誤信念課題の通過年齢におけるメタ分析が行われるほど膨大なデータが揃った。その結果,最もデータ数の多い欧米を基準とするとオーストラリアの子どもはそれより早く,日本の子どもは最も通過が遅れることが明らかになった。Naito & Koyama(2006)は,日本語は心的状態語を明確には表現しないために心の理論の発達が遅れると指摘したが,各文化内における検証はなされていても,文化間において共通の文脈下で検証している実証研究はない。子どもの心の理論の発達には母親の言語使用が密接に関わっていることから大人の言語使用についての文化差を見ることが重要だと考えられる。欧米よりも通過が早いオーストラリア,そして最も遅れる日本の文化差の原因を言語使用から検討する。

著者

松嵜 直幸 原澤 賢充 繁桝 博昭 森田 寿哉 伊藤 崇之 齊藤 隆弘 佐藤 隆夫 相澤 清晴 北崎 充晃

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.15, no.1, pp.41-44, 2010-03-31 (Released:2017-02-01)

参考文献数

5

---

This paper investigated the effects of active/passive viewing on the visually induced motion sickness. Participants wearing a Head-Mount-Display (HMD) searched a target character in random dots and other characters projected on a screen using a video camera moved by them (active viewing). They could see a part of the screen and the movies displayed via the HMD were recorded. When they saw the recorded movie later (passive viewing) through the HMD, they felt motion sickness worth than before. This suggests that passive viewing induced severer motion sickness than active viewing.

著者

北崎 充晃 中野 智亮

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.15, no.1, pp.17-25, 2010-03-31 (Released:2017-02-01)

参考文献数

17

被引用文献数

1

---

'Sensory conflict' theory is one of well-known theories for motion sickness. We conducted two experiments to determine the effects of the conflict between actual (extra-retinal) eye-movement and visually-simulated (retinal) eye-movement on motion sickness in a virtual environment. In results, we found that motion sickness was significantly decreased by controlling observers' eye-movement with a stationary/moving fixation point. When the extra-retinal and the retinal eye-movements were incongruent during the observer's head moving, the motion sickness was increased for sickness-sensitive observers. These results suggest that we can decrease motion sickness by controlling eye-movements with a stationary/moving fixation point to remove conflict between the extra-retinal and the visual eye-movements. This proposal represents a new approach to decreasing or preventing motion sickness in virtual environments.

著者

石本 浩気 加藤 優貴 北崎 充晃

出版者

日本基礎心理学会

雑誌

基礎心理学研究 (ISSN:02877651)

巻号頁・発行日

vol.40, no.2, pp.121-134, 2022-03-31 (Released:2022-06-17)

参考文献数

58

---

The COVID-19 pandemic has placed significant restrictions on experiments such as those using motion capture suits in the laboratory. On the other hand, the number of users of virtual reality (VR) social network services has been increasing due to the pandemic. Thus, we constructed a laboratory in VRChat, one of the VR social network services, where full-body ownership experiments can be conducted, and validated it. The subjects entered the experimental world in VRChat, changed into the experimental avatar, and participated in the experiment. The subject’s movements and the avatar were synchronized or asynchronized with 1-s delay. After 5-min ball reaching using the avatar, subjective evaluations were made regarding senses of body ownership, agency, and pseudo-haptics. In the synchronous condition, we obtained a stronger sense of body ownership, agency, and pseudo-haptic sensation than in the asynchronous condition, reproducing the results of previous studies. These results suggest that the laboratory in the public VR social network enables us to manipulate experimental conditions, and perform experiments on full-body illusion.

著者

北崎 充晃

出版者

日本視覚学会

雑誌

VISION (ISSN:09171142)

巻号頁・発行日

vol.9, no.3, pp.173-180, 1997 (Released:2019-04-19)

著者

北崎 充晃

出版者

心理学評論刊行会

雑誌

心理学評論 (ISSN:03861058)

巻号頁・発行日

vol.59, no.3, pp.312-323, 2016

---

<p>I aim to implement 'we-mode' in cyberspace by connecting several physical spaces. The we-mode is a special cognitive mode to intimately cooperate with others, and enhance human cognitive abilities and behavioral performances beyond the individual's ability and performance. Studies on self-body perception, illusory body-ownership (e.g. rubber hand illusion, out-of-body experience, virtual embodiment), social interactions with others (e.g. Mutual gaze), changing one's own body image, and its social and psychological impacts in cyberspace using virtual reality technologies as well as in physical space are reviewed. Based on those findings I consider how to induce or create we-mode in cyberspace and what can be realized by the cyberspace we-mode compared with the physical-space we-mode.</p>

著者

加藤 優貴 長町 和弥 杉本 麻樹 稲見 昌彦 北崎 充晃

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.26, no.1, pp.22-31, 2021

---

<p>Pseudo physical contact is used for communication in virtual environments such as VRChat. We hypothesized that the pseudo physical contact could affect interpersonal impression and communication, and the interpersonal impression would be modulated by appearance of body or avatar type. To test these hypotheses, we performed a questionnaire survey for VRChat users (N=341). In results, interpersonal impression and communication difficulty were improved after the pseudo physical contact, but the avatar type did not modulate the interpersonal impression. These results suggest that the pseudo physical contact could improve the interpersonal impression and communication in virtual environments.</p>

著者

稲見 昌彦 南澤 孝太 杉本 麻樹 北崎 充晃

出版者

東京大学

雑誌

基盤研究(A)

巻号頁・発行日

2015-04-01

---

今年度は、新たな身体に全身を投射する実験条件だけでなく,局所に操作対象を投射している場面においても同様の身体像の学習が可能かを,視触覚提示を用いて検証した.具体的には,ロボットアームを身体に装着し,下肢で操作するシステムを構築した.ロボットアームからの感覚情報によるフィードバックを下肢で確認しながら,能動的に操作対象を動かすことにより,新たな身体像を学習させることに成功した.また,視覚的に透明な身体に対し,身体像を投射可能か実験を行い,その効果を検証した.

著者

上田 祥平 池井 寧 広田 光一 北崎 充晃

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.21, no.1, pp.15-22, 2016-03-31 (Released:2017-02-01)

---

We developed a walking recording and experiencing system. For the recording system we captured stereo motion images from two cameras attached to a person's forehead with synchronized data of ankles' accelerations. For the experiencing system we presented 3-D motion images with binocular disparity on a head-mounted display, and presented vibrations to user's soles of feet at the same time. The vibration was made from a footstep sound when a person walked. We found that users subjectively reported that the 3-D motion images with synchronized foot vibrations elicited stronger feelings of walking, leg motion, stepping, and telepresence than without vibrations. These results suggest that our walking experiencing system gives users somewhat active walking feelings.

著者

雨宮 智浩 池井 寧 広田 光一 北崎 充晃

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.21, no.4, pp.627-633, 2016 (Released:2017-02-01)

参考文献数

26

---

The representation of the peripersonal space is remapped by body action such as integrating tactile stimuli from the body's surface with multisensory stimuli presented within a limited distance from the body. Previous study showed that boundaries of the peipersonal space extend while walking with listening to a looming sound, but it is unclear whether the boundaries change when a sensation of walking is induced with no physical body motion. Here, we examine the change using a technique to induce a sensation of pseudo-walking by presenting vibrotactile stimuli of recorded footsteps sound at the feet soles. Experiments were performed to compare the reaction times to detect a vibrotactile stimulus on the chest with listening to a looming sound toward the body, taken as a proxy of the peripersonal space boundary. Experimental evaluations showed that the peripersonal space seems to expand when a sensation of pseudo-walking was clearly induced.