scholarly journals Does Global Precedence Occur with Displays of Multiple Hierarchical Objects?

2019 ◽  
Vol 19 (10) ◽  
pp. 45b
Author(s):  
Jong Han Lee ◽  
Thomas Sanocki
Keyword(s):  
Global Precedence

Global precedence and response activation: Evidence from LRPs

2002 ◽  
Vol 55 (1) ◽  
pp. 289-310 ◽  
Author(s):  
Jeff Miller ◽  
David Navon
Keyword(s):  
Global Precedence ◽  
Local Shape ◽  
Global Shape ◽  
Preliminary Information ◽  
Readiness Potentials ◽  
Global Advantage ◽  
Response Activation ◽  
Lateralized Readiness Potentials

Lateralized readiness potentials (LRPs) were measured in left/right/no-go tasks using compound global/local stimuli. In Experiment 1, participants responded to local target shapes and ignored global ones. RTs were affected by the congruence of the global shape with the local one, and LRPs indicated that irrelevant global shapes activated the responses with which they were associated. In Experiment 2, participants responded to conjunctions of target shapes at both levels, withholding the response if a target appeared at only one level. Global shapes activated responses in no-go trials, but local shapes did not. The results are consistent with partial-output models in which preliminary information about global shape can partially activate responses that are inconsistent with the local shape. They also demonstrate that part of the global advantage arises early, before response activation begins and probably before recognition of the local shape.

Local-Level and Global-Level Form Characteristics in Apparent-Motion Correspondence

Perception ◽  
1995 ◽  
Vol 24 (11) ◽  
pp. 1233-1245 ◽  
Author(s):  
Terry Palmer ◽  
Ovid J L Tzeng ◽  
Sheng He
Keyword(s):  
Apparent Motion ◽  
Motion Detection ◽  
Local Level ◽  
The Other ◽  
Correspondence Problem ◽  
Global Level ◽  
Global Precedence ◽  
Detection Mechanism ◽  
Motion Display ◽  
Motion Correspondence

This study addressed the ‘correspondence’ problem of apparent-motion (AM) perception in which parts of a scene must be matched with counterparts separated in time and space. Given evidence that AM correspondence can be mediated by two distinct processes—one based on a low-level motion-detection mechanism (the Reichardt process), the other involving the tracking of objects by visual attention (the attention-based process)—the present study explored how these processes interact in the perception of apparent motion between hierarchically structured figures. In three experiments, hierarchical figures were presented in a competition motion display so that, across frames, figures were identical at either the local or the global level. In experiment 1 it was shown that AM occurred between locally identical figures. Furthermore, with the Reichardt AM component eliminated in experiments 3 and 4, no preference was obtained for either level. While evidence from previous studies suggests that form extraction for hierarchically structured figures proceeds from the global to the local level, the present results indicate the irrelevance of such a global precedence in AM correspondence. In addition, it is suggested that Reichardt AM correspondence between local elements constrains attention-based AM correspondence between global figures so that both components move in the same direction. It is argued that this constraining process represents an elegant means of achieving AM correspondence between objects undergoing complex transformations.

How Many Trees Does it Take to Make a Forest?

Perception ◽  
1983 ◽  
Vol 12 (3) ◽  
pp. 239-254 ◽  
Author(s):  
David Navon
Keyword(s):  
Local Features ◽  
Global Precedence ◽  
The Times ◽  
Global And Local

In order to study the relative perceptual availability of global and local features in very sparse patterns, subjects were asked to make ‘same’/‘different’ judgments on pairs of geometrical figures and the times needed to detect global and local differences were compared. With triangular patterns a global precedence was found which could be attributed to size differences. With rectangular patterns global precedence was larger, not accounted for by size differences, and indifferent both to the number of elements and to their spacing. Thus it was demonstrated that global precedence may hold for patterns with as few as four elements. Patterns with smooth edges could be compared much more quickly than patterns with serrated eges. It is proposed that configurational properties of some of the patterns interfered with the encoding of their global structures or with comparing them. It is argued that the results support a principle of global addressability which postulates that visual schemata are mainly addressed through their global constituents.

scholarly journals Global precedence in visual pattern recognition

1984 ◽  
Vol 35 (4) ◽  
pp. 361-371 ◽  
Author(s):  
Howard C. Hughes ◽  
W. Michael Layton ◽  
John C. Baird ◽  
Laurie S. Lester
Keyword(s):  
Pattern Recognition ◽  
Visual Pattern ◽  
Global Precedence ◽  
Visual Pattern Recognition

What does the nature of the stimuli tell us about the Global Precedence Effect?

2008 ◽  
Vol 127 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Nicolas Poirel ◽  
Arlette Pineau ◽  
Emmanuel Mellet
Keyword(s):  
Precedence Effect ◽  
Global Precedence

Lateral Masking as a Determinant of Global Dominance

Perception ◽  
1992 ◽  
Vol 21 (6) ◽  
pp. 705-716 ◽  
Author(s):  
K Wayne Podrouzek ◽  
Vito Modigliani ◽  
Vincent Di Lollo
Keyword(s):  
Reaction Time ◽  
Compound Stimulus ◽  
High Spatial Frequency ◽  
Indirect Evidence ◽  
Dependent Measure ◽  
Global Precedence ◽  
Lateral Masking ◽  
Compound Images ◽  
Frequency Components ◽  
Inhibitory Interactions

The term compound letter refers to a large (global) letter made up of small (local) letters. Reaction time to identify local letters is longer when local and global letters are different than when they are the same (the global dominance effect). The possible contribution of lateral masking to this effect was investigated. Lateral masking denotes reduced probability of identifying a stimulus when it is closely surrounded by other stimuli (as is the case for the local items in a compound stimulus). Three experiments were conducted in which the dependent measure was percentage of correct responses, rather than reaction time. In experiment 1 compound letters were used; accuracy of performance yielded evidence of global dominance such as obtained with reaction time measures. In experiments 2 and 3 the strength of lateral masking in geometrical forms was varied by varying the density of their component items. In agreement with earlier suggestions based on indirect evidence, the results directly implicated lateral masking as an important determinant of global dominance. However, lateral masking could not account fully for the experimental outcome. Factors beyond lateral masking, such as global precedence in the processing sequence or inhibitory interactions among low and high spatial-frequency components of the compound images are required in order to provide a comprehensive account of global dominance effects.

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