Egocentric Direction and Locomotion

2004 ◽  
pp. 339-362 ◽  
Author(s):  
Simon K. Rushton
Keyword(s):  
Egocentric Direction

scholarly journals The role of motion parallax in the perception of egocentric direction

2017 ◽  
Vol 17 (10) ◽  
pp. 985
Author(s):  
Kait Clark ◽  
Simon Rushton
Keyword(s):  
Motion Parallax ◽  
Egocentric Direction

scholarly journals Optic-flow and egocentric-direction strategies in walking: Central vs peripheral visual field

2005 ◽  
Vol 45 (25-26) ◽  
pp. 3117-3132 ◽  
Author(s):  
Kathleen A. Turano ◽  
Dylan Yu ◽  
Lei Hao ◽  
John C. Hicks
Keyword(s):  
Visual Field ◽  
Optic Flow ◽  
Peripheral Visual Field ◽  
Egocentric Direction

scholarly journals Blind footballers direct their head towards an approaching ball during ball trapping

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Takumi Mieda ◽  
Masahiro Kokubu
Keyword(s):  
Rotation Angle ◽  
Sagittal Plane ◽  
Early Time ◽  
Head Rotation ◽  
Head Movements ◽  
Football Players ◽  
Trunk Rotation ◽  
The Moment ◽  
Head Rotations ◽  
Egocentric Direction

AbstractIn blind football, players predict the sound location of a ball to underpin the success of ball trapping. It is currently unknown whether blind footballers use head movements as a strategy for trapping a moving ball. This study investigated characteristics of head rotations in blind footballers during ball trapping compared to sighted nonathletes. Participants performed trapping an approaching ball using their right foot. Head and trunk rotation angles in the sagittal plane, and head rotation angles in the horizontal plane were measured during ball trapping. The blind footballers showed a larger downward head rotation angle, as well as higher performance at the time of ball trapping than did the sighted nonathletes. However, no significant differences between the groups were found with regards to the horizontal head rotation angle and the downward trunk rotation angle. The blind footballers consistently showed a larger relative angle of downward head rotation from an early time point after ball launching to the moment of ball trapping. These results suggest that blind footballers couple downward head rotation with the movement of an approaching ball, to ensure that the ball is kept in a consistent egocentric direction relative to the head throughout ball trapping.

Peripersonal versus extrapersonal visual scene information for egocentric direction and position perception

2018 ◽  
Vol 71 (5) ◽  
pp. 1090-1099 ◽  
Author(s):  
Ryoichi Nakashima ◽  
Takatsune Kumada
Keyword(s):  
Visual Information ◽  
Spatial Perception ◽  
Visual Scene ◽  
Visual Environment ◽  
Intermediate Region ◽  
The Road ◽  
Scene Information ◽  
Near Occlusion ◽  
Egocentric Direction

When perceiving the visual environment, people simultaneously perceive their own direction and position in the environment (i.e., egocentric spatial perception). This study investigated what visual information in a scene is necessary for egocentric spatial perceptions. In two perception tasks (the egocentric direction and position perception tasks), observers viewed two static road images presented sequentially. In Experiment 1, the critical manipulation involved an occluded region in the road image, an extrapersonal region (far-occlusion) and a peripersonal region (near-occlusion). Egocentric direction perception was worse in the far-occlusion condition than in the no-occlusion condition, and egocentric position perceptions were worse in the far- and near-occlusion conditions than in the no-occlusion condition. In Experiment 2, we conducted the same tasks manipulating the observers’ gaze location in a scene—an extrapersonal region (far-gaze), a peripersonal region (near-gaze) and the intermediate region between the former two (middle-gaze). Egocentric direction perception performance was the best in the far-gaze condition, and egocentric position perception performances were not different among gaze location conditions. These results suggest that egocentric direction perception is based on fine visual information about the extrapersonal region in a road landscape, and egocentric position perception is based on information about the entire visual scene.

scholarly journals Far or near visual scene? What is visual information necessary for egocentric direction and position perceptions?

2015 ◽  
Vol 79 (0) ◽  
pp. 1PM-077-1PM-077
Author(s):  
Ryoichi Nakashima ◽  
Ritsuko Iwai ◽  
Sayako Ueda ◽  
Ryuta Iseki ◽  
Takatsune Kumada
Keyword(s):  
Visual Information ◽  
Visual Scene ◽  
Egocentric Direction

scholarly journals Allocentric location cues and the visual guidance of walking towards seen targets

2019 ◽  
Author(s):  
Tracey A. Herlihey ◽  
Danlu Cen ◽  
Seralynne Vann ◽  
Cyril Charron ◽  
Simon Rushton
Keyword(s):  
Standard Technique ◽  
Visual Guidance ◽  
Motion Cues ◽  
Indoor Space ◽  
Surrounding Environment ◽  
On Line ◽  
Outdoor Space ◽  
Egocentric Direction

We hypothesised allocentric location cues (information about the location of an observer relative to the surrounding environment) have a role in the on-line visual guidance of walking towards seen target objects. We used a standard technique for assessing the contribution of cues when walking to targets: we perturbed the perceived egocentric direction of the target, and measured the curvature of the resultant walking trajectories. By removing motion cues we were able to isolate allocentric location cues and quantify their utility. Enclosed, geometrically regular, environments contain rich allocentric location cues. In the first experiment participants walked through a large enclosed outdoor space; allocentric cues were isolated by synchronised eye closing and stepping. In the second experiment participants walked through a smaller enclosed indoor space; allocentric cues were isolated with stroboscopic lighting. Both experiments provided support for the hypothesis that, when they are available, allocentric location cues have a key role when walking to seen targets.

scholarly journals Speech behaviour of Latvian Russian-speaking schoolchildren in argumentative texts

2019 ◽  
Vol 17 (4) ◽  
pp. 428-444
Author(s):  
Margarita A. Gavrilina
Keyword(s):  
Secondary School ◽  
Text Analysis ◽  
Russian Language ◽  
Ninth Graders ◽  
Different Types ◽  
Language Norms ◽  
Text Content ◽  
Argumentative Texts ◽  
Egocentric Direction

The article analyses the problems, which Russian-speaking schoolchildren in Latvia meet while creating written argumentative texts. The topicality of the article lies in the peculiarities of forming the schoolchildren’s linguistic personality in the diaspore during bilingual education. The author focuses on the main problems in the schoolchildren’s written speech and their reasons. The criteria of text content-analysis were as follows: 1) the level of argumentation autonomy; 2) the quality of the arguments; 3) the level of argument unfoldedness and using different types of arguments; 4) speech expressiveness and observing language norms. The ninth-graders’ text analysis led the author to the following conclusions: the compositions of most schoolchildren partly correspond with argumentative texts (in the aspect of their contents, structure, quantity and quality of arguments, means of thought development); they lack intertextual embeddings (the texts are “poor” in the sense aspect); in the speech behaviour there dominates an explicit I-communication (reflexive observations, egocentric direction of their behaviour), pragmatic, naked outline of facts even if the topic of the text motivates to verbalize emotions; there are a lot of language errors. The results of the research are based on analysis of 3296 ninth-graders, which the schoolchildren wrote at Russian language exam on finishing secondary school in 2016-2018. The results of this and further researches will allow the author to deeply investigate the process of forming primary and secondary linguistic personality of a Russian-speaking schoolchild in Latvia.

scholarly journals Visual and proprioceptive shifts in perceived egocentric direction induced by eye-position

2000 ◽  
Vol 40 (5) ◽  
pp. 539-547 ◽  
Author(s):  
Jörg Lewald ◽  
Walter H. Ehrenstein
Keyword(s):  
Eye Position ◽  
Egocentric Direction
Sign in / Sign up

Export Citation Format

Share Document