Children's Photograph Selections and Verbal Reports in a Spatial Task

Perception ◽  
1983 ◽  
Vol 12 (5) ◽  
pp. 599-606 ◽  
Author(s):  
Rachel M Calam

The tendency for children to select a photograph of their own view of a scene when asked to represent the view seen by another observer in a different position has been attributed to an egocentric view of the world. It seems likely, however, that the egocentric response need not necessarily be related to the question of sensitivity to the viewpoints of others. Rather, it may reflect the way in which children treat two-dimensional representations of three-dimensional arrays in mental-rotation tasks. In the present investigation, strong visual and verbal cues were given for correct selection of a photograph of another observer's view in a perspective-shift task. Justifications for choices were required. Whilst floor effects were seen with children 3 to 4 years old, the responses of 8-year olds polarised into a choice between the correct and egocentric view, as Freeman would predict. Verbal justifications for these choices were mainly in terms of appropriate content. After first selection, this chosen view was removed from the array. Two-thirds of children who had chosen egocentrically then went on to choose correctly on a second attempt. It is suggested that the egocentric response may form an easier alternative for the child, but that the provision of such an alternative may prevent the child from displaying the knowledge that he or she has.

2019 ◽  
Vol 43 (4) ◽  
pp. 653-660 ◽  
Author(s):  
M.V. Gashnikov

Adaptive multidimensional signal interpolators are developed. These interpolators take into account the presence and direction of boundaries of flat signal regions in each local neighborhood based on the automatic selection of the interpolating function for each signal sample. The selection of the interpolating function is performed by a parameterized rule, which is optimized in a parametric lower dimensional space. The dimension reduction is performed using rank filtering of local differences in the neighborhood of each signal sample. The interpolating functions of adaptive interpolators are written for the multidimensional, three-dimensional and two-dimensional cases. The use of adaptive interpolators in the problem of compression of multidimensional signals is also considered. Results of an experimental study of adaptive interpolators for real multidimensional signals of various types are presented.


2019 ◽  
Vol 45 (1) ◽  
pp. 28-33 ◽  
Author(s):  
Tom J. Quick ◽  
Hazel Brown

Major nerve injuries such as those of the brachial plexus present a significant challenge for both rehabilitation and evaluation of outcome. With these often complex and multi-faceted injuries, correct selection of outcome measures is important. Healthy nerve function in humans heightens our interactions with the world, creating quality and enjoyment through our experiences of movement and touch. Therefore, assessments should be holistic and representative of all of these features. This article considers the assessment and evaluation of all of the features of nerve injury: sensorimotor, sensation (including that of pain), function and the psychosocial aspects. Current practice is described and combined with clinical experience and research findings to provide suggestions and recommendations for the selection of the most appropriate tools for use with this patient group.


2013 ◽  
Vol 712-715 ◽  
pp. 1171-1174 ◽  
Author(s):  
Li Xin Wang ◽  
Yu Guo ◽  
Ming Yue Guo

A great change in mechanical industry has occurred after several successful practices using MBD (Model Based Definition) of The Boeing Company. It is an inevitable trend from two-dimensional product definition to three-dimensional product definition in mechanical industry. Several standards for MBD have emerged around the world. This paper explores the non-revolved parts modeling methods based on MBD and Pro/ENGINEER, presents several key steps about full-annotated model per MBD and then makes a conclusion. Following these methods we successfully build a typical non-revolved model which conforms to MBD standards correctly and efficiently.


1985 ◽  
Vol 39 (1) ◽  
pp. 100-129 ◽  
Author(s):  
Pierre Jolicœur ◽  
Sonya Regehr ◽  
Lyndon B. J. P. Smith ◽  
Garth N. Smith

2018 ◽  
Vol 855 ◽  
pp. 839-859 ◽  
Author(s):  
Katarzyna N. Kowal ◽  
Stephen H. Davis ◽  
Peter W. Voorhees

We investigate the onset of three-dimensional hydrothermal waves in a low-capillary-number liquid layer of arbitrary depth, bounded by a free liquid–gas interface from above and a partial slip, rigid surface from below. A selection of two- and three-dimensional hydrothermal waves, longitudinal rolls and longitudinal travelling waves, form the preferred mode of instability, which depends intricately on the magnitude of the basal slip. Partial slip is destabilizing for all modes of instability. Specifically, the minimal Marangoni number required for the onset of instability follows $M_{m}\sim a(\unicode[STIX]{x1D6FD}^{-1}+b)^{-c}$ for each mode, where $a,b,c>0$ and $\unicode[STIX]{x1D6FD}^{-1}$ is the slip parameter. In the limit of free slip, longitudinal travelling waves disappear in favour of longitudinal rolls. With increasing slip, it is common for two-dimensional hydrothermal waves to exchange stability in favour of longitudinal rolls and oblique hydrothermal waves. Two types of oblique hydrothermal waves appear under partial slip, which exchange stability with increasing slip. The oblique mode that is preferred under no slip persists and remains near longitudinal for small slip parameters.


1997 ◽  
Vol 8 (3) ◽  
pp. 217-223 ◽  
Author(s):  
Michael K. McBeath ◽  
Diane J. Schiano ◽  
Barbara Tversky

The two experiments reported explored a bias toward symmetry in judging identity and orientation of indeterminate two-dimensional shapes Subjects viewed symmetric and asymmetric filled, random polygons and described “what each figure looks like” and its orientation Viewers almost universally interpreted the shapes as silhouettes of bilaterally symmetric three-dimensional (3-D) objects This assumption of 3-D symmetry tended to constrain perceived vantage of the identified objects such that symmetric shapes were interpreted as straight-on views, and asymmetric shapes as profile or oblique views Because most salient objects in the world are bilaterally symmetric, these findings are consistent with the view that assuming 3-D symmetry can be a robust heuristic for constraining orientation when identifying objects from indeterminate patterns


2015 ◽  
Vol 74 (3) ◽  
pp. 312-322
Author(s):  
Branko Mitrović

One of the most fundamental assumptions of modern architectural practice is that all spatial relationships on a building are mathematically definable and can be systematically described by means of two-dimensional representations generated using procedures based on quantification. It is this assumption that makes three-dimensional computer modeling possible. In Leon Battista Alberti, Mental Rotation, and the Origins of Three-Dimensional Computer Modeling, Branko Mitrović analyzes the historical origins of this approach to visual communication about architectural works and its first explicit articulation in the work of Leon Battista Alberti.


1995 ◽  
pp. 3-15 ◽  
Author(s):  
Margaret Lanca ◽  
John R. Kirby

It has been proposed that the ability to read a map stems from both verbal-analytic and spatial-holistic processes. It has, in tum, been argued that these processes are affected by both spatial ability and gender. This essay presents the results of a study exploring these relationships. Subjects studied a contour map in one of four conditions: a verbal learning group, a spatial learning group, a combined spatial and verbal learning group, and a study-only control group. Contrary to previous reference map learning studies, this study found that the verbal task had no effect upon memory for two-dimensional map information. As predicted, the spatial task did increase memory for three-dimensional map information. In terms of spatial learning instructions, males performed significantly better than females for three-dimensional map information, and females' two-dimensional map memory was better in the non-spatial task groups than in the spatial task groups. There was no effect of spatial ability for map memory. These results suggest limits for the benefit of a verbal learning task in contour map learning.


1997 ◽  
Vol 10 (3) ◽  
pp. 453-470 ◽  
Author(s):  
Ruth Glasner

The ArgumentIt was commonly accepted in the middle ages that void within or outside the world is impossible. The paper presents a quite unusual conception of void, which is described in Yeda'aya ha-Penini's commentary on Ibn Rushd's epitome on Aristotle's Physics. According to this conception there is a thin layer of void between the water and the inner surface of the container. Ha-Penini describes two versions of this conception. According to one version this void layer is three-dimensional but thin, according to the other it is two-dimensional. The first part of the paper shows how ha-Penini “corrects” the text of Ibn Rushd, putting into it ideas which were unknown to Ibn Rushd. It is argued that, though the two views are rejected by Ibn Rushd, ha-Penini himself partly accepts (his version of) these views. The second part of the paper argues that ha-Penini could not have found these views in the Arabic-Hebrew tradition, and it seems that he relied on Christian sources. If this is indeed so, the paper presents an example of acquaintance of Hebrew scholars in southern France with Scholastic science in the first half of the fourteenth century.


2015 ◽  
Vol 2015 ◽  
pp. 1-4 ◽  
Author(s):  
Fumiaki Nakao

In the bifurcation stenting, the distal rewiring for the side branch postdilatation confirmed by two-dimensional modalities may not lead to favorable results in some cases. If there are two distal cells divided by the link bridging from the carina, the rewiring through the larger distal cell may be recommended for the side branch postdilatation. Detailed confirmation of the rewired cell by the intraprocedural instant stent-accentuated three-dimensional optical coherence tomography is important.


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