How Long is Your Arm? Using Multisensory Illusions to Modify Body Image from the Third Person Perspective

Perception ◽  
10.1068/p7103 ◽  
2012 ◽  
Vol 41 (2) ◽  
pp. 247-249 ◽  
Author(s):  
Catherine Preston ◽  
Roger Newport
Keyword(s):  
Body Image ◽  
Subjective Experience ◽  
Body Representations ◽  
Normal Length ◽  
The Third ◽  
Person Perspective ◽  
Third Person ◽  
Third Person Perspective ◽  
The Third Person ◽  
Multisensory Illusions

Updating body representations from the 3rd person perspectives (3PP) seems to require viewing the real body, unlike when viewing from a 1st person perspective. Here, 3PP updating was investigated through induction of a physically impossible multisensory illusion in which participants viewed real-time 3PP video of themselves having their arm pulled until it stretched to twice its normal length. The illusion elicited the subjective experience that the participant's own arm had been stretched and caused an overestimation of reaching distance, although actual reaches were unaffected. Multisensory illusions from the 3PP can alter body image when applied to real bodies.

Causal determinism and a totally global fatalism from the third-person perspective

2020 ◽  
Author(s):  
Xiaoyang Yu
Keyword(s):  
Human Brain ◽  
Human Language ◽  
Causal Determinism ◽  
The Third ◽  
Person Perspective ◽  
Neural Substrate ◽  
Third Person ◽  
Third Person Perspective ◽  
Physical Laws ◽  
The Third Person

The human brain and the human language are precisely constructed together by evolution/genes, so that in the objective world, a human brain can tell a story to another brain in human language which describes an imagined multiplayer game; in this story, one player of the game represents the human brain itself. It’s possible that the human kind doesn’t really have a subjective world (doesn’t really have conscious experience). An individual has no control even over her choices. Her choices are controlled by the neural substrate. The neural substrate is controlled by the physical laws. So, her choices are controlled by the physical laws. So, she is powerless to do anything other than what she actually does. This is the view of fatalism. Specifically, this is the view of a totally global fatalism, where people have no control even over their choices, from the third-person perspective. And I just argued for fatalism by appeal to causal determinism. Psychologically, a third-person perspective and a new, dedicated personality state are required to bear the totally global fatalism, to avoid severe cognitive dissonance with our default first-person perspective and our original personality state.

Knowledge from the Outside

2021 ◽  
pp. 40-79
Author(s):  
Hilary Kornblith
Keyword(s):  
The Third ◽  
Person Perspective ◽  
The World ◽  
Third Person ◽  
First Person Perspective ◽  
Third Person Perspective ◽  
The Third Person ◽  
Perceptual Systems ◽  
Obvious Source

Knowledge may be examined from the third-person perspective, as psychologists and sociologists do, or it may be examined from the first-person perspective, as each of us does when we reflect on what we ought to believe. This chapter takes the third-person perspective. One obvious source of knowledge is perception, and some general features of how our perceptual systems are able to pick up information about the world around us are highlighted. The role of the study of visual illusions in this research is an important focus of the chapter. Our ability to draw out the consequences of things we know by way of inference is another important source of knowledge, and some general features of how inference achieves its successes are discussed. Structural similarities between the ways in which perception works and the ways in which inference works are highlighted.

scholarly journals Epistemic Foundations of Political Liberalism

2013 ◽  
Vol 10 (5) ◽  
pp. 598-620 ◽  
Author(s):  
Fabienne Peter
Keyword(s):  
Political Institutions ◽  
Political Liberalism ◽  
Public Justification ◽  
Reasonable Disagreement ◽  
The Third ◽  
The Core ◽  
Person Perspective ◽  
Third Person ◽  
Third Person Perspective ◽  
The Third Person

At the core of political liberalism is the claim that political institutions must be publicly justified or justifiable to be legitimate. What explains the significance of public justification? The main argument that defenders of political liberalism present is an argument from disagreement: the irreducible pluralism that is characteristic of democratic societies requires a mode of justification that lies in between a narrowly political solution based on actual acceptance and a traditional moral solution based on justification from the third-person perspective. But why should we take disagreements seriously? This—epistemic question—has not received the attention it deserves so far. I argue that the significance of public justification can be explained through the possibility of reasonable disagreement. In a reasonable disagreement, the parties hold mutually incompatible beliefs, but each is justified to hold the belief they do. I shall use the notion of a reasonable disagreement to explain the possibility of an irreducible pluralism of moral and religious doctrines and, on that basis, why the justification of political institutions has to be public.

scholarly journals Motor Program Transformation of Throwing Dart from the Third-Person Perspective

2020 ◽  
Vol 10 (1) ◽  
pp. 55
Author(s):  
Alexey Tumialis ◽  
Alexey Smirnov ◽  
Kirill Fadeev ◽  
Tatiana Alikovskaia ◽  
Pavel Khoroshikh ◽  
...  
Keyword(s):  
Peak Velocity ◽  
Motor Program ◽  
First Person ◽  
Head Mounted Display ◽  
The Third ◽  
Person Perspective ◽  
Third Person ◽  
First Person Perspective ◽  
Third Person Perspective ◽  
The Third Person

The perspective of perceiving one’s action affects its speed and accuracy. In the present study, we investigated the change in accuracy and kinematics when subjects throw darts from the first-person perspective and the third-person perspective with varying angles of view. To model the third-person perspective, subjects were looking at themselves as well as the scene through the virtual reality head-mounted display (VR HMD). The scene was supplied by a video feed from the camera located to the up and 0, 20 and 40 degrees to the right behind the subjects. The 28 subjects wore a motion capture suit to register their right hand displacement, velocity and acceleration, as well as torso rotation during the dart throws. The results indicated that mean accuracy shifted in opposite direction with the changes of camera location in vertical axis and in congruent direction in horizontal axis. Kinematic data revealed a smaller angle of torso rotation to the left in all third-person perspective conditions before and during the throw. The amplitude, speed and acceleration in third-person condition were lower compared to the first-person view condition, before the peak velocity of the hand in the direction toward the target and after the peak velocity in lowering the hand. Moreover, the hand movement angle was smaller in the third-person perspective conditions with 20 and 40 angle of view, compared with the first-person perspective condition just preceding the time of peak velocity, and the difference between conditions predicted the changes in mean accuracy of the throws. Thus, the results of this study revealed that subject’s localization contributed to the transformation of the motor program.

scholarly journals A Defense of the Phenomenological Account of Health and Illness

2019 ◽  
Vol 44 (4) ◽  
pp. 459-478 ◽  
Author(s):  
Fredrik Svenaeus
Keyword(s):  
Philosophy Of Medicine ◽  
The Third ◽  
Person Perspective ◽  
Health And Illness ◽  
Third Person ◽  
Phenomenological Account ◽  
Third Person Perspective ◽  
The Third Person ◽  
Hans Georg Gadamer ◽  
Nietzschean Critique

Abstract A large slice of contemporary phenomenology of medicine has been devoted to developing an account of health and illness that proceeds from the first-person perspective when attempting to understand the ill person in contrast and connection to the third-person perspective on his/her diseased body. A proof that this phenomenological account of health and illness, represented by philosophers, such as Drew Leder, Kay Toombs, Havi Carel, Hans-Georg Gadamer, Kevin Aho, and Fredrik Svenaeus, is becoming increasingly influential in philosophy of medicine and medical ethics is the criticism of it that has been voiced in some recent studies. In this article, two such critical contributions, proceeding from radically different premises and backgrounds, are discussed: Jonathan Sholl’s naturalistic critique and Talia Welsh’s Nietzschean critique. The aim is to defend the phenomenological account and clear up misunderstandings about what it amounts to and what we should be able to expect from it.

scholarly journals Effects of Avatar Perspective on Joint Excursions Used to Play Virtual Dodgeball: Within-Subject Comparative Study

10.2196/18888 ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. e18888
Author(s):  
Susanne M van der Veen ◽  
Alexander Stamenkovic ◽  
Megan E Applegate ◽  
Samuel T Leitkam ◽  
Christopher R France ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Repeated Measures ◽  
First Person ◽  
Head Mounted Display ◽  
The Third ◽  
Person Perspective ◽  
Third Person ◽  
First Person Perspective ◽  
Third Person Perspective ◽  
The Third Person

Background Visual representation of oneself is likely to affect movement patterns. Prior work in virtual dodgeball showed greater excursion of the ankles, knees, hips, spine, and shoulder occurs when presented in the first-person perspective compared to the third-person perspective. However, the mode of presentation differed between the two conditions such that a head-mounted display was used to present the avatar in the first-person perspective, but a 3D television (3DTV) display was used to present the avatar in the third-person. Thus, it is unknown whether changes in joint excursions are driven by the visual display (head-mounted display versus 3DTV) or avatar perspective during virtual gameplay. Objective This study aimed to determine the influence of avatar perspective on joint excursion in healthy individuals playing virtual dodgeball using a head-mounted display. Methods Participants (n=29, 15 male, 14 female) performed full-body movements to intercept launched virtual targets presented in a game of virtual dodgeball using a head-mounted display. Two avatar perspectives were compared during each session of gameplay. A first-person perspective was created by placing the center of the displayed content at the bridge of the participant’s nose, while a third-person perspective was created by placing the camera view at the participant’s eye level but set 1 m behind the participant avatar. During gameplay, virtual dodgeballs were launched at a consistent velocity of 30 m/s to one of nine locations determined by a combination of three different intended impact heights and three different directions (left, center, or right) based on subject anthropometrics. Joint kinematics and angular excursions of the ankles, knees, hips, lumbar spine, elbows, and shoulders were assessed. Results The change in joint excursions from initial posture to the interception of the virtual dodgeball were averaged across trials. Separate repeated-measures ANOVAs revealed greater excursions of the ankle (P=.010), knee (P=.001), hip (P=.0014), spine (P=.001), and shoulder (P=.001) joints while playing virtual dodgeball in the first versus third-person perspective. Aligning with the expectations, there was a significant effect of impact height on joint excursions. Conclusions As clinicians develop treatment strategies in virtual reality to shape motion in orthopedic populations, it is important to be aware that changes in avatar perspective can significantly influence motor behavior. These data are important for the development of virtual reality assessment and treatment tools that are becoming increasingly practical for home and clinic-based rehabilitation.

Selbstwissen: Die Grundidee

2015 ◽  
Vol 63 (4) ◽  
Author(s):  
Richard Moran
Keyword(s):  
Daily Life ◽  
First Person ◽  
Object A ◽  
The Third ◽  
Person Perspective ◽  
Third Person ◽  
Self Knowledge ◽  
First Person Perspective ◽  
Third Person Perspective ◽  
The Third Person

AbstractIn philosophy it is widely recognized that a person’s first-person perspective on his own thought and action is importantly different from the third-person perspective we may have on the thought and actions of other people. In daily life it is natural to ask someone what he is doing or what he thinks about something, on the assumption that he knows what he is doing or what he is thinking. Some philosophers, however, argue that it is impossible to speak of knowledge in this context because the idea of knowledge requires a kind of distance between subject and object, a distance that is not present in the first-person context. I argue that this denial of self-knowledge is a paradoxical conclusion that we can resist, while retaining what is distinctive about the first-person.

scholarly journals Social Space and the Question of Objectivity / Der soziale Raum und die Frage nach der Objektivität

2017 ◽  
Vol 39 (2-3) ◽  
pp. 249-262
Author(s):  
James Mensch
Keyword(s):  
Social Space ◽  
First Person ◽  
Social Dimensions ◽  
The Third ◽  
Person Perspective ◽  
The Social ◽  
Third Person ◽  
First Person Perspective ◽  
Third Person Perspective ◽  
The Third Person

Summary In speaking of the social dimensions of human experience, we inevitably become involved in the debate regarding how they are to be studied. Should we embrace the first-person perspective, which is that of the phenomenologists, and begin with the experiences composing our directly experienced lifeworld? Alternately, should we follow the lead of natural scientists and take up the third-person perspective? This is the perspective that asserts that we must begin with what is true for everyone, i.e., with what is available to both me and Others (the “they” that forms the grammatical third person). Both perspectives are one sided in that each presupposes the other for its intelligibility. The third-person perspective is Cartesian and, as I show, privileges space, while the first-person perspective is social in Levinas’s sense and presupposes time. Our reality, I argue, embraces both perspectives and is, in fact, set by their intertwining.

scholarly journals Level-1 Visual Perspective Taking Performance in People with High Narcissistic Traits

2021 ◽  
Author(s):  
Sima Ebrahimian ◽  
Bradley Mattan ◽  
Mazaher Rezaei
Keyword(s):  
Perspective Taking ◽  
Visual Perspective ◽  
First Person ◽  
The Third ◽  
Person Perspective ◽  
Third Person ◽  
First Person Perspective ◽  
Level 1 ◽  
Third Person Perspective ◽  
The Third Person

Abstract Background: Lack of empathy is one of the main characteristics of narcissists. However, it is not clear whether there is a similar deficit in other facets of mentalizing, such as perspective-taking.Method: In this study, we measured the taking visual perspectives ascribed to different targets (e.g., first-person self, third-person self-avatar, and third-person stranger avatar). Our study focused on separate groups of individuals with high and low self-reported narcissistic traits. Results: Participants reporting high Narcissism scores showed higher accuracy in a third-person perspective-taking task than did their low-Narcissism counterparts. However, when the first-person perspective was incongruent with the third-person (first person vs. self- tagged avatar), the accuracy of their responses decreased.Conclusions: The discrepancy between the two types of perspective taking of people with high narcissism can probably mean that the narcissistic people perfectly identify / empathize with one object (person, avatar, character, etc.) and therefore their perspective-taking is disrupted when they need to identify with more than one object that represent their self-attributed perspectives.

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