The Gestalt Principle of Continuation Applies to both the Haptic and Visual Grouping of Elements

2007 ◽  
Author(s):  
Dempsey Chang ◽  
Keith V. Nesbitt ◽  
Kevin Wilkins
Keyword(s):  
Gestalt Principle ◽  
Visual Grouping

scholarly journals Visual grouping in human parietal cortex

2007 ◽  
Vol 104 (47) ◽  
pp. 18766-18771 ◽  
Author(s):  
Y. Xu ◽  
M. M. Chun
Keyword(s):  
Parietal Cortex ◽  
Visual Grouping

A comparison of benchmark task and insight evaluation methods for information visualization

2011 ◽  
Vol 10 (3) ◽  
pp. 162-181 ◽  
Author(s):  
Chris North ◽  
Purvi Saraiya ◽  
Karen Duca
Keyword(s):  
User Interfaces ◽  
Time Series Data ◽  
Evaluation Methodology ◽  
Series Data ◽  
Task Structure ◽  
Graph Visualization ◽  
Data Types ◽  
Match Task ◽  
Visual Grouping ◽  
Multiple Data

This study compares two different empirical research methods for evaluating information visualizations: the traditional benchmark-task method and the insight method. The methods are compared using criteria such as the conclusions about the visualization designs provided by each method, the time participants spent during the study, the time and effort required to analyse the resulting empirical data, and the effect of individual differences between participants on the results. The study compares three graph visualization alternatives that associate bioinformatics microarray time series data to pathway graph vertices in order to investigate the effect of different visual grouping structures in visualization designs that integrate multiple data types. It is confirmed that visual grouping should match task structure, but interactive grouping proves to be a well-rounded alternative. Overall, the results validate the insight method’s ability to confirm results of the task method, but also show advantages of the insight method to illuminate additional types of tasks. Efficiency and insight frequently correlate, but important distinctions are found. Categories: H.5.2 [Information Interfaces and Presentation]: User Interfaces – evaluation/methodology.

scholarly journals Glass Patterns: Some Contrast Effects Re-Evaluated

Perception ◽  
1997 ◽  
Vol 26 (3) ◽  
pp. 253-268 ◽  
Author(s):  
Steven C Dakin
Keyword(s):  
Spatial Filtering ◽  
Contrast Effects ◽  
Visual Grouping ◽  
Relative Contrast ◽  
Low Pass ◽  
Band Pass ◽  
Opposite Contrast ◽  
Low Pass Filters ◽  
Glass Patterns ◽  
High Pass

The relative contrast of features is known to be important in determining if they can be grouped. Two manipulations of feature contrast have previously been used to criticise models of visual grouping based on spatial filtering: high-pass filtering and reversal of contrast polarity. The effects of these manipulations are considered in the context of the perception of Glass patterns. It is shown that high-pass filtering elements, whilst destroying structure in the output of low-pass filters, do not significantly disrupt the output of locally band-pass filters. The finding that subjects can perceive structure in Glass patterns composed of high-pass features therefore offers no evidence against such spatial filtering mechanisms. Band-pass filtering models are shown to explain the rotation of perceived structure in Glass patterns composed of opposite contrast features. However, structure is correctly perceived in patterns composed of two ‘interleaved’ opposite contrast patterns, which is problematic for oriented filtering mechanisms. Two possible explanations are considered: nonlinear contrast transduction prior to filtering, and integration of local orientation estimates from first-order and second-order mechanisms.

scholarly journals How visual perceptual grouping influences foot placement

2015 ◽  
Vol 2 (7) ◽  
pp. 150151 ◽  
Author(s):  
John Fennell ◽  
Charlotte Goodwin ◽  
Jeremy F. Burn ◽  
Ute Leonards
Keyword(s):  
Perceptual Grouping ◽  
Step Width ◽  
Foot Placement ◽  
Visual Grouping ◽  
Visual Distractor ◽  
Close Proximity ◽  
Different Types ◽  
Regular Path ◽  
Visual Characteristics ◽  
The Impact

Everybody would agree that vision guides locomotion; but how does vision influence choice when there are different solutions for possible foot placement? We addressed this question by investigating the impact of perceptual grouping on foot placement in humans. Participants performed a stepping stone task in which pathways consisted of target stones in a spatially regular path of foot falls and visual distractor stones in their proximity. Target and distractor stones differed in shape and colour so that each subset of stones could be easily grouped perceptually. In half of the trials, one target stone swapped shape and colour with a distractor in its close proximity. We show that in these ‘swapped’ conditions, participants chose the perceptually groupable, instead of the spatially regular, stepping location in over 40% of trials, even if the distance between perceptually groupable steps was substantially larger than normal step width/length. This reveals that the existence of a pathway that could be traversed without spatial disruption to periodic stepping is not sufficient to guarantee participants will select it and suggests competition between different types of visual input when choosing foot placement. We propose that a bias in foot placement choice in favour of visual grouping exists as, in nature, sudden changes in visual characteristics of the ground increase the uncertainty for stability.

Visual Grouping and the Focusing of Attention Induce Gamma-band Oscillations at Different Frequencies in Human Magnetoencephalogram Signals

2006 ◽  
Vol 18 (11) ◽  
pp. 1850-1862 ◽  
Author(s):  
Juan R. Vidal ◽  
Maximilien Chaumon ◽  
J. Kevin O'Regan ◽  
Catherine Tallon-Baudry
Keyword(s):  
Short Term Memory ◽  
Implementation Process ◽  
Visual Display ◽  
Gamma Oscillations ◽  
Gamma Band ◽  
Visual Grouping ◽  
Gamma Range ◽  
High Gamma ◽  
The One ◽  
Attentional Filter

Neural oscillatory synchrony could implement grouping processes, act as an attentional filter, or foster the storage of information in short-term memory. Do these findings indicate that oscillatory synchrony is an unspecific epiphenomenon occurring in any demanding task, or that oscillatory synchrony is a fundamental mechanism involved whenever neural cooperation is requested? If the latter hypothesis is true, then oscillatory synchrony should be specific, with distinct visual processes eliciting different types of oscillations. We recorded magnetoencephalogram (MEG) signals while manipulating the grouping properties of a visual display on the one hand, and the focusing of attention to memorize part of this display on the other hand. Grouping-related gamma oscillations were present in all conditions but modulated by the grouping properties of the stimulus (one or two groups) in the high gamma-band (70–120 Hz) at central occipital locations. Attention-related gamma oscillations appeared as an additional component whenever attentional focusing was requested in the low gamma-band (44–66 Hz) at parietal locations. Our results thus reveal the existence of a functional specialization in the gamma range, with grouping-related oscillations showing up at higher frequencies than attention-related oscillations. The pattern of oscillatory synchrony is thus specific of the visual process it is associated with. Our results further suggest that both grouping processes and focused attention rely on a common implementation process, namely, gamma-band oscillatory synchrony, a finding that could account for the fact that coherent percepts are more likely to catch attention than incoherent ones.

scholarly journals Phenomenon of perceiving and memorizing historical buildings and sites

2009 ◽  
Vol 7 (2) ◽  
pp. 107-120
Author(s):  
Rifat Alihodzic ◽  
Nadja Kurtovic-Folic
Keyword(s):  
Ordinary People ◽  
Historical Buildings ◽  
Gestalt Principle ◽  
Interactive Relationship ◽  
Initial Method

The interactive relationship between psychology and architecture is still being neglected when the possibilities potentially obtainable by perceiving and memorizing architectural forms and space are considered . The contemporary architects, or a part of them are well aware of these possibilities while designing their buildings, and it is of great interest to ascertain how professionals and ordinary people perceived and memorized buildings and sites through history. The paper presents certain psychological methods that could be very helpful in this research. One of those methods have The Gestalt principle is the initial method of one such method, because the memorizing process strongly relies on the concept of 'crystallization' of a perceived event with the passage of time. Some examples, well known through building history have been analyzed and compared in order to demonstrate how the interaction between psychology and architectural forms and spaces.

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