Visual Direction Illusions in Everyday Situations: Implications for Sensorimotor and Ecological Theories

Eye Movements ◽  
2017 ◽  
pp. 95-110
Author(s):  
Wayne L. Shebilske
Keyword(s):  
Visual Direction ◽  
Ecological Theories

scholarly journals The Direction of Walking—but Not Throwing or Kicking—Is Adapted by Optic Flow

2010 ◽  
Vol 21 (7) ◽  
pp. 1006-1013 ◽  
Author(s):  
Hugo Bruggeman ◽  
William H. Warren
Keyword(s):  
Optic Flow ◽  
Perception And Action ◽  
Functional Mapping ◽  
Visual Direction ◽  
Head Orientation ◽  
Functional Level ◽  
Coordinate Frames ◽  
Negative Aftereffect

Optic flow is known to adapt the direction of walking, but the locus of adaptation remains unknown. The effect could be due to realignment of anatomical eye, head, trunk, and leg coordinate frames or to recalibration of a functional mapping from the visual direction of the target to the direction of locomotion. We tested whether adaptation of walking to a target, with optic flow displaced by 10°, transfers to facing, throwing, and kicking a ball to the target. A negative aftereffect for initial walking direction failed to transfer to head orientation or throwing or kicking direction. Thus, participants effectively threw or kicked the ball to the target, and then walked in another direction to retrieve it. These findings are consistent with recalibration of a task-specific visuo-locomotor mapping, revealing a functional level of organization in perception and action.

scholarly journals The cyclopean eye is relevant for predicting visual direction

2005 ◽  
Vol 45 (18) ◽  
pp. 2339-2345 ◽  
Author(s):  
Mykola Khokhotva ◽  
Hiroshi Ono ◽  
Alistair P. Mapp
Keyword(s):  
Visual Direction

scholarly journals Bringing the biophysical to the fore: Re-envisioning organizational adaptation in the era of planetary shifts

2021 ◽  
pp. 147612702198998
Author(s):  
Jennifer Howard-Grenville ◽  
Brooke Lahneman
Keyword(s):  
Ecological Systems ◽  
Organizational Adaptation ◽  
Business Organizations ◽  
Adaptation Theory ◽  
Social Ecological Systems ◽  
Social Ecological ◽  
Ecological Theories ◽  
External Environments

The nature and scope of changes in organizations’ external environments is without precedent due to planetary shifts, or major changes in earth’s biophysical systems. Our theories of organizational adaptation lack the capacity to explain what will be needed on behalf of business organizations, and their strategists and managers, to adjust to these shifts. In this essay, we review organizational adaptation theory and explain why it falls short of offering adequate explanations in an era of planetary shifts. We then draw on ecological theories of adaptation, with their focus on social-ecological systems and panarchy, to suggest ways to advance organizational adaptation theory for our times.

Another Geopolitics? International Relations and the Boundaries of World Order

2021 ◽  
Author(s):  
Regan Burles
Keyword(s):  
International Relations ◽  
Political Ecology ◽  
International System ◽  
World Order ◽  
World Politics ◽  
Global Politics ◽  
Ecological Change ◽  
Ecological Theories ◽  
Problems And Solutions ◽  
Shed Light

Abstract Geopolitics has become a key site for articulating the limits of existing theories of international relations and exploring possibilities for alternative political formations that respond to the challenges posed by massive ecological change and global patterns of violence and inequality. This essay addresses three recent books on geopolitics in the age of the Anthropocene: Simon Dalby's Anthropocene Geopolitics: Globalization, Security, Sustainability (2020), Jairus Victor Grove's Savage Ecology: War and Geopolitics at the End of the World (2019), and Bruno Latour's Down to Earth: Politics in the New Climactic Regime (2018). The review outlines and compares how these authors pose contemporary geopolitics as a problem and offer political ecology as the ground for an alternative geopolitics. The essay considers these books in the context of critiques of world politics in international relations to shed light on both the contributions and the limits of political ecological theories of global politics. I argue that the books under review encounter problems and solutions posed in Kant's critical and political writings in relation to the concepts of epigenesis and teleology. These provoke questions about the ontological conceptions of order that enable claims to world political authority in the form of a global international system coextensive with the earth's surface.

Ecological Disturbance: A Test of the Matching Hypothesis

1980 ◽  
Vol 5 (3) ◽  
pp. 169-174 ◽  
Author(s):  
Thomas J. Curran ◽  
Bob Algozzine
Keyword(s):  
Emotional Disturbance ◽  
Ecological Theory ◽  
Regular Classroom ◽  
Classroom Teachers ◽  
Ecological Disturbance ◽  
Ecological Theories ◽  
Potential Benefits ◽  
Matching Hypothesis ◽  
Critical Components ◽  
Different Levels

Ecological theories of emotional disturbance emphasize the interactions between the child's unique characteristics and reactions of others to those features as critical components in defining disturbance. In this study, regular classroom teachers with different levels of tolerance for immature behaviors were asked to rate a hypothetical child thought to exhibit immature or defiant behaviors. An analyses of of the teachers' ratings of the child's likelihood of success in a regular classroom suggested that tolerance was influential in the teachers' decisions regarding the child. The implications of the results are discussed with regard to assumptions underlying ecological theory, and as support for the potential benefits of ecological matching of teachers and children.1

Influence of Ball and Background Patterns on Perception of Visual Direction of a Moving Object

1979 ◽  
Vol 49 (2) ◽  
pp. 343-346 ◽  
Author(s):  
Marcella V. Ridenour
Keyword(s):  
Analysis Of Variance ◽  
Moving Objects ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Moving Object ◽  
Visual Direction ◽  
Visual Patterns ◽  
Prediction Time ◽  
The Subject ◽  
Three Dimensional Space

30 boys and 30 girls, 6 yr. old, participated in a study assessing the influence of the visual patterns of moving objects and their respective backgrounds on the prediction of objects' directionality. An apparatus was designed to permit modified spherical objects with interchangeable covers and backgrounds to move in three-dimensional space in three directions at selected speeds. The subject's task was to predict one of three possible directions of an object: the object either moved toward the subject's midline or toward a point 18 in. to the left or right of the midline. The movements of all objects started at the same place which was 19.5 ft. in front of the subject. Prediction time was recorded on 15 trials. Analysis of variance indicated that visual patterns of the moving object did not influence the prediction of the object's directionality. Visual patterns of the background behind the moving object did not influence the prediction of the object's directionality except during the conditions of a light nonpatterned moving object. It was concluded that visual patterns of the background and that of the moving object have a very limited influence on the prediction of direction.

Distributed spatial coding in the superior colliculus: A review

1991 ◽  
Vol 6 (1) ◽  
pp. 3-13 ◽  
Author(s):  
James T. McIlwain
Keyword(s):  
Eye Movements ◽  
Superior Colliculus ◽  
Receptive Fields ◽  
Saccadic Eye Movements ◽  
Visual Direction ◽  
Saccade Amplitude ◽  
Spatial Coding ◽  
Distributed Coding

AbstractThis paper reviews evidence that the superior colliculus (SC) of the midbrain represents visual direction and certain aspects of saccadic eye movements in the distribution of activity across a population of cells. Accurate and precise eye movements appear to be mediated, in part at least, by cells of the SC that have large sensory receptive fields and/or discharge in association with a range of saccades. This implies that visual points or saccade targets are represented by patches rather than points of activity in the SC. Perturbation of the pattern of collicular discharge by focal inactivation modifies saccade amplitude and direction in a way consistent with distributed coding. Several models have been advanced to explain how such a code might be implemented in the colliculus. Evidence related to these hypotheses is examined and continuing uncertainties are identified.

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