The Visual Search of an Illusory Figure: A Comparison between 6-Month-Old Infants and Adults

Perception ◽  
10.1068/p6272 ◽  
2009 ◽  
Vol 38 (9) ◽  
pp. 1313-1327 ◽  
Author(s):  
Hermann Bulf ◽  
Eloisa Valenza ◽  
Francesca Simion
Keyword(s):  
Visual Search ◽  
Supporting Evidence ◽  
Illusory Figure ◽  
Eye Tracker ◽  
Control Stimulus ◽  
The Real ◽  
Focal Attention ◽  
Illusory Control ◽  
Per Se ◽  
Kanizsa Figure

The aim of the present study was to investigate how perceptual binding and selective attention operate during infants' and adults' visual search of an illusory figure. An eye-tracker system was used to test adults and infants in two conditions: illusory and non-illusory (real). In the illusory condition, a Kanizsa triangle was embedded among distractor pacmen which did not generate illusory contours. In the non-illusory condition, a real triangle was included in the same pacmen's display. The results showed that adults detected both the Kanizsa and the real figure automatically and without focal attention (experiment 1). In contrast, 6-month-old infants showed a pop-out effect only for the real figure (experiment 2). The failure of the illusory figure to trigger infants' attention was not due to infants' inability to perceive the illusory figure per se, as infants preferred the illusory figure over a non-illusory control stimulus in a classical preferential-looking task (experiment 3). Overall, these findings indicate that the illusory Kanizsa triangle triggers visual attention in adults, but not in infants, supporting evidence that at 6 months of age the binding processes involved in the perception of a Kanizsa figure do not operate in an adult-like manner.

scholarly journals Expert camouflage-breakers can accurately localize search targets

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Fallon Branch ◽  
Allison JoAnna Lewis ◽  
Isabella Noel Santana ◽  
Jay Hegdé
Keyword(s):  
Deep Learning ◽  
Visual Search ◽  
Target Localization ◽  
Specific Training ◽  
Learning Paradigm ◽  
Accuracy And Precision ◽  
Per Se ◽  
Special Case

AbstractCamouflage-breaking is a special case of visual search where an object of interest, or target, can be hard to distinguish from the background even when in plain view. We have previously shown that naive, non-professional subjects can be trained using a deep learning paradigm to accurately perform a camouflage-breaking task in which they report whether or not a given camouflage scene contains a target. But it remains unclear whether such expert subjects can actually detect the target in this task, or just vaguely sense that the two classes of images are somehow different, without being able to find the target per se. Here, we show that when subjects break camouflage, they can also localize the camouflaged target accurately, even though they had received no specific training in localizing the target. The localization was significantly accurate when the subjects viewed the scene as briefly as 50 ms, but more so when the subjects were able to freely view the scenes. The accuracy and precision of target localization by expert subjects in the camouflage-breaking task were statistically indistinguishable from the accuracy and precision of target localization by naive subjects during a conventional visual search where the target ‘pops out’, i.e., is readily visible to the untrained eye. Together, these results indicate that when expert camouflage-breakers detect a camouflaged target, they can also localize it accurately.

scholarly journals What Does Productivity Really Mean? Towards an Integrative Paradigm in the Search for Biodiversity-Productivity Relationships

2013 ◽  
Vol 41 (1) ◽  
pp. 36 ◽  
Author(s):  
Liangjun HU ◽  
Qinfeng GUO
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Biomass Production ◽  
Real Root ◽  
Spatial Scaling ◽  
Ecological Processes ◽  
The Real ◽  
Community Or ◽  
Per Se ◽  
Underlying Mechanisms

How species diversity relates to productivity remains a major debate. To date, however, the underlying mechanisms that regulate the ecological processes involved are still poorly understood. Three major issues persist in early efforts at resolution. First, in the context that productivity drives species diversity, how the pathways operate is poorly-explained. Second, productivity  per se varies with community or ecosystem maturity. If diversity indeed drives productivity, the criterion of choosing appropriate measures for productivity is not available. Third, spatial scaling suggests that sampling based on small-plots may not be suitable for formulating species richness-productivity relationships (SRPRs). Thus, the long-standing assumption simply linking diversity with productivity and pursuing a generalizing pattern may not be robust. We argue that productivity, though defined as ‘the rate of biomass production’, has been measured in two ways environmental surrogates and biomass production leading to misinterpretations and difficulty in the pursuit of generalizable SRPRs. To tackle these issues, we developed an integrative theoretical paradigm encompassing richer biological and physical contexts and clearly reconciling the major processes of the systems, using proper productivity measures and sampling units. We conclude that loose interpretation and confounding measures of productivity may be the real root of current SRPR inconsistencies and debate.

A Room of One’s Own, Woolf’s “little book on poetry”

2021 ◽  
pp. 107-135
Author(s):  
Emily Kopley
Keyword(s):  
Women Writers ◽  
Young Women ◽  
Women Poets ◽  
The Novel ◽  
English Studies ◽  
The Real ◽  
Experimental Works ◽  
Per Se ◽  
Room Of One's Own ◽  
The Prestige

In several essays concurrent with her major experimental works of the 1920s, Woolf proclaims that the novel will usurp the tools and the place of poetry. Most important among these essays is the book-length A Room of One’s Own (1929). Here Woolf identifies the lack of poet foremothers available as models to women writers. She urges young women to fill this gap by writing not poetry per se, but rather prose whose greatness qualifies it as “poetry.” Woolf wants to gain for prose, and by extension women writers, the prestige historically accorded to verse. This chapter sketches the historic link among English Studies, poetry, and patriarchy. This link contributed to Woolf’s vision of the novel as the democratic, feminist alternative to poetry. It also spurred her subtle challenge in A Room of One’s Own to Sir Arthur Quiller-Couch, who had doubted women’s ability to write poetry. This chapter concludes by considering the real women poets who inspired Woolf’s fiction of Judith Shakespeare.

Exploring the Real World: Medical Librarians' Involvement in Supporting Evidence-Based Medicine (EBM) Practice

2013 ◽  
Author(s):  
Ping Li ◽  
Lin Wu
Keyword(s):  
Data Analysis ◽  
Survey Data ◽  
Real World ◽  
Evidence Based Medicine ◽  
Online Survey ◽  
Evidence Based ◽  
Supporting Evidence ◽  
The Real ◽  
Based Medicine

This paper reports the results of an online survey that explores medical librarians’ roles and activities in supporting EBM practice. More than 500 medical librarians replied to the survey. Data analysis reveals that librarians have been taking on various EBM-related responsibilities both routine by nature and project-related.Cet article présente les résultats d’un sondage en ligne portant sur les rôles et les activités des bibliothécaires du domaine des sciences de la santé pour soutenir les pratiques de médecine fondée sur les preuves (MFP). Plus de 500 bibliothécaires ont répondu au sondage. L’analyse des données révèlent que ces bibliothécaires ont participé à des activités routinières et à des projets relevant du domaine de la MFP. 

Verbal and Spatial Loading Effects on Eye Movements in Driving Simulators: A Comparison to Real World Driving

2002 ◽  
Vol 46 (26) ◽  
pp. 2174-2178 ◽  
Author(s):  
Kim R. Hammel ◽  
Donald L. Fisher ◽  
Anuj K. Pradhan
Keyword(s):  
Eye Movement ◽  
Real World ◽  
Driving Simulator ◽  
Loading Conditions ◽  
Eye Tracker ◽  
Driving Simulators ◽  
The Real ◽  
Movement Data ◽  
Loading Effects ◽  
Functional Field Of View

Driving simulators and eye tracking technology are increasingly being used to evaluate advanced telematics. Many such evaluations are easily generalizable only if drivers' scanning in the virtual environment is similar to their scanning behavior in real world environments. In this study we developed a virtual driving environment designed to replicate the environmental conditions of a previous, real world experiment (Recarte & Nunes, 2000). Our motive was to compare the data collected under three different cognitive loading conditions in an advanced, fixed-base driving simulator with that collected in the real world. In the study that we report, a head mounted eye tracker recorded eye movement data while participants drove the virtual highway in half-mile segments. There were three loading conditions: no loading, verbal loading and spatial loading. Each of the 24 subjects drove in all three conditions. We found that the patterns that characterized eye movement data collected in the simulator were virtually identical to those that characterized eye movement data collected in the real world. In particular, the number of speedometer checks and the functional field of view significantly decreased in the verbal conditions, with even greater effects for the spatial loading conditions.

scholarly journals Verification in theory and in the sciences

2020 ◽  
pp. 25
Author(s):  
Konstantinos Papageorgiou ◽  
Demetrios Lekkas
Keyword(s):  
Real World ◽  
Formal Logic ◽  
Logical System ◽  
The Real ◽  
The Road ◽  
The Common ◽  
Per Se ◽  
The Relationship ◽  
Made In

In this work, we undertake the task of laying out some basic considerations towards straightening out the foundations of an abstract logical system. We venture to explain what theory is as well as what is not theory, to discriminate between the roles of truth in theory and in reality, as well as to open the road towards clarifying the relationship between theory and the real world. Etymological, cultural and conceptual analyses of truth are brought forth in order to reveal problems in modern approaches and to set the stage for more consistent solutions. One such problem addressed here is related to negation per se, to its asymmetry towards affirmative statements and to the essential ramifications of this duality with respect to the common perceptual and linguistic aspects of words indicating concepts akin to truth in various languages and to attitudes reflected and perpetuated in them and to their consequent use in attempted informal or formal logic and its understanding. Finally, a case study invoking the causes or “causes” of gravity both clarifies and reinforces the points made in this paper.

scholarly journals Reality in a sphere: A direct comparison of social attention in the laboratory and the real world

2021 ◽  
Author(s):  
Jonas D. Großekathöfer ◽  
Christian Seis ◽  
Matthias Gamer
Keyword(s):  
Reliability And Validity ◽  
Social Attention ◽  
Social Avoidance ◽  
Eye Tracker ◽  
Social Situations ◽  
Public Places ◽  
The Real ◽  
Head Mounted Display ◽  
Real Environment ◽  
The City

AbstractHumans often show reduced social attention in real situations, a finding rarely replicated in controlled laboratory studies. Virtual reality is supposed to allow for ecologically valid and at the same time highly controlled experiments. This study aimed to provide initial insights into the reliability and validity of using spherical videos viewed via a head-mounted display (HMD) to assess social attention. We chose five public places in the city of Würzburg and measured eye movements of 44 participants for 30 s at each location twice: Once in a real environment with mobile eye-tracking glasses and once in a virtual environment playing a spherical video of the location in an HMD with an integrated eye tracker. As hypothesized, participants demonstrated reduced social attention with less exploration of passengers in the real environment as compared to the virtual one. This is in line with earlier studies showing social avoidance in interactive situations. Furthermore, we only observed consistent gaze proportions on passengers across locations in virtual environments. These findings highlight that the potential for social interactions and an adherence to social norms are essential modulators of viewing behavior in social situations and cannot be easily simulated in laboratory contexts. However, spherical videos might be helpful for supplementing the range of methods in social cognition research and other fields. Data and analysis scripts are available at https://osf.io/hktdu/.

scholarly journals Towards Interactive Search: Investigating Visual Search in a Novel Real-World Paradigm

2020 ◽  
Vol 10 (12) ◽  
pp. 927
Author(s):  
Marian Sauter ◽  
Maximilian Stefani ◽  
Wolfgang Mack
Keyword(s):  
Visual Search ◽  
Real World ◽  
Search Behavior ◽  
Natural Scenes ◽  
The Real ◽  
Interactive Search ◽  
Search Processes ◽  
Interactive Nature ◽  
Computer Based ◽  
Static Pictures

An overwhelming majority of studies on visual search and selective attention were conducted using computer screens. There are arguably shortcomings in transferring knowledge from computer-based studies to real-world search behavior as findings are based on viewing static pictures on computer screens. This does not go well with the dynamic and interactive nature of vision in the real world. It is crucial to take visual search research to the real world in order to study everyday visual search processes. The aim of the present study was to develop an interactive search paradigm that can serve as a “bridge” between classical computerized search and everyday interactive search. We based our search paradigm on simple LEGO® bricks arranged on tabletop trays to ensure comparability with classical computerized visual search studies while providing room for easily increasing the complexity of the search environment. We found that targets were grasped slower when there were more distractors (Experiment 1) and there were sizable differences between various search conditions (Experiment 2), largely in line with classical visual search research and revealing similarities to research in natural scenes. Therefore, our paradigm can be seen as a valuable asset complementing visual search research in an environment between computerized search and everyday search.

scholarly journals An Eye Tracking Analysis on Diagnostic Performance of Digital Fundus Photography Images between Ophthalmologists and Optometrists

2019 ◽  
Vol 17 (1) ◽  
pp. 30
Author(s):  
Mizhanim Mohamad Shahimin ◽  
Azalia Razali
Keyword(s):  
Visual Search ◽  
Eye Movement ◽  
Correct Diagnosis ◽  
Fundus Photography ◽  
Eye Tracker ◽  
Total Fixation ◽  
Search Patterns ◽  
Scan Path ◽  
Scan Paths ◽  
Fundus Photographs

To investigate the parameters of eye movement between ophthalmologists and optometrists while diagnosing digital fundus photographs, sixteen participants (eight ophthalmologists and eight optometrists) were recruited in this study. Every participant’s eye movement during diagnosis of a randomized set of fundus photographs displayed on an eye tracker were recorded. Fixation metrics (duration, count and rate) and scan path patterns were extracted from the eye tracker. These parameters of eye movement and correct diagnosis score were compared between both groups. Correlation analyses between fixation metrics and correct diagnosis score were also performed. Although fixation metrics between ophthalmologists and optometrists were not statistically different (p > 0.05), these parameters were statistically different when compared between different area of interests. Both participant groups had a similar correct diagnosis score. No correlation was found between fixation metrics and correct diagnosis score between both groups, except for total fixation duration and ophthalmologists’ diagnosis score of diabetic retinopathy photographs. The ophthalmologists’ scan paths were simpler, with larger saccades, and were distributed at the middle region of the photographs. Conversely, optometrists’ scan paths were extensive, with shorter saccades covering wider fundus areas, and were accumulated in some unrelated fundus areas. These findings indicated comparable efficiency and systematic visual search patterns between both the groups. Understanding visual search strategy could expedite the creation of a novel training routine for interpretation of ophthalmic diagnostic imaging.

The toxicity of oil herbicides to Paspalum dilatatum POIR. 2. The effect of light on toxicity.

1953 ◽  
Vol 4 (2) ◽  
pp. 177 ◽  
Author(s):  
LF Myers
Keyword(s):  
Perennial Grass ◽  
Supporting Evidence ◽  
Additional Experiment ◽  
Paspalum Dilatatum ◽  
Contact Effect ◽  
Before And After ◽  
Per Se ◽  
Reduced Toxicity ◽  
Light Shading ◽  
Effect Of Light

The influence of light on the phytotoxicity of hydrocarbon oils was investigated by exposing the oils to light before and after application to a perennial grass, Paspalurn dilatatum Poir. Exposure of the oils to light and air for a month prior to spraying slightly increased the speed of contact injury to foliage but did not affect regrowth. Oils had a contact effect on foliage only in the presence of light. Shading the plants for one week following treatment delayed the development of contact injury and resulted in greater inhibition of regrowth (toxicity). The increase in toxicity following shading is ascribed to the delay in contact effect per se. The results suggested an antagonism between speed of contact injury and inhibition of regrowth. Supporting evidence was provided by an additional experiment in which fortifying agents were added to the oils. Fortifying agents increased speed of foliage kill but in no instance was toxicity increased. When power kerosene was used the addition of fortifying agents reduced toxicity.

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