Diagnostic Colours Influence Speeded Scene Recognition

Perception ◽  
1996 ◽  
Vol 25 (1_suppl) ◽  
pp. 114-114
Author(s):  
A Oliva ◽  
P G Schyns
Keyword(s):  
Scene Recognition ◽  
Critical Aspect ◽  
Diagnostic Categories ◽  
Visual Processes ◽  
Real Scene ◽  
Memory Representations ◽  
Psychophysical Studies ◽  
Second Category ◽  
Shape Data

A critical aspect of early visual processes is to extract shape data for matching against memory representations for recognition. Many theories of recognition assume that this is achieved by luminance information. However, psychophysical studies have revealed that colour is being used by low-level visual modules such as motion, stereopsis, texture, and 2-D shapes. Should colour really be discarded from theories of recognition? Here we present two studies which seek to throw light on the role of chromatic information for the recognition of real scene pictures. We used three versions of scene pictures (gray levels, normally coloured and abnormally coloured) coming from two broad categories. In the first category, colour was diagnostic of the category (eg beach, forest, and valley). In the second category colour was not diagnostic (eg city, road, and room). In the second category colour was not diagnostic (eg city, road, and room). Results revealed that chromatic information is being registered and facilitates recognition even after a 30 ms exposure to the scene stimuli. However, influences of colour on speeded categorisations were only observed with the colour-diagnostic categories. No influence of colour was observed with the other categories. A similar pattern of results was observed with 120 ms exposure. However, there was an interference of the wrong colour on recognition in colour-diagnostic categories. In sum, colour, when it is diagnostic of the category, influences speeded scene recognition.

Examining the Role of Language in Play Among Children With and Without Developmental Disabilities

2020 ◽  
Vol 51 (3) ◽  
pp. 795-806 ◽  
Author(s):  
Elizabeth J. Short ◽  
Rachael Cooper Schindler ◽  
Rita Obeid ◽  
Maia M. Noeder ◽  
Laura E. Hlavaty ◽  
...  
Keyword(s):  
Developmental Disabilities ◽  
Autism Spectrum ◽  
Free Play ◽  
Group Differences ◽  
Typically Developing ◽  
Play Skills ◽  
Critical Aspect ◽  
Hyperactivity Disorder ◽  
Better Than

Purpose Play is a critical aspect of children's development, and researchers have long argued that symbolic deficits in play may be diagnostic of developmental disabilities. This study examined whether deficits in play emerge as a function of developmental disabilities and whether our perceptions of play are colored by differences in language and behavioral presentations. Method Ninety-three children participated in this study (typically developing [TD]; n = 23, developmental language disorders [DLD]; n = 24, attention-deficit/hyperactivity disorder [ADHD]; n = 26, and autism spectrum disorder [ASD]; n = 20). Children were videotaped engaging in free-play. Children's symbolic play (imagination, organization, elaboration, and comfort) was scored under conditions of both audible language and no audible language to assess diagnostic group differences in play and whether audible language impacted raters' perception of play. Results Significant differences in play were evident across diagnostic groups. The presence of language did not alter play ratings for the TD group, but differences were found among the other diagnostic groups. When language was audible, children with DLD and ASD (but not ADHD) were scored poorly on play compared to their TD peers. When language was not audible, children with DLD were perceived to play better than when language was audible. Conversely, children with ADHD showed organizational deficits when language was not available to support their play. Finally, children with ASD demonstrated poor play performance regardless of whether language was audible or not. Conclusions Language affects our understanding of play skills in some young children. Parents, researchers, and clinicians must be careful not to underestimate or overestimate play based on language presentation. Differential skills in language have the potential to unduly influence our perceptions of play for children with developmental disabilities.

Innovation in the Seed Market: The Role of IPRs and Commercialization Rules

2016 ◽  
Vol 14 (1) ◽  
Author(s):  
Marc Baudry ◽  
Adrien Hervouet
Keyword(s):  
Product Differentiation ◽  
Economic Consequences ◽  
Vertical Product Differentiation ◽  
Legal Rules ◽  
Sequential Innovation ◽  
Seed Market ◽  
Second Category ◽  
The Impact ◽  
Compulsory Registration

AbstractThis article deals with the impact of legal rules on incentives in the seeds sector to create new plant varieties. The first category of rules consists in intellectual property rights and is intended to address a problem of sequential innovation and R&D effort. The second category concerns commercial rules that are intended to correct a problem of adverse selection. We propose a dynamic model of market equilibrium with vertical product differentiation that enables us to take into account the economic consequences of imposing either Plant Breeders’ Rights (PBRs) or patents as IPRs and either compulsory registration in a catalog or minimum standards as commercialization rules. The main result is that the combination of catalog registration and PBRs adopted in Europe is hardly supported by the model calibrated on data for wheat in France.

Cytology of Nonneoplastic Occupational and Environmental Diseases of the Lung and Pleura

2007 ◽  
Vol 131 (11) ◽  
pp. 1700-1708 ◽  
Author(s):  
Rodolfo Laucirica ◽  
Mary L. Ostrowski
Keyword(s):  
Respiratory Tract ◽  
Lung Diseases ◽  
Asbestos Exposure ◽  
Cell Hyperplasia ◽  
Cytologic Examination ◽  
Diagnostic Categories ◽  
Etiologic Agents ◽  
Limited Experience ◽  
Occupational Lung Diseases

Abstract Context.—Cytologic examination of the respiratory tract has been a useful diagnostic tool when evaluating neoplastic lesions of the respiratory tract. However, we have limited experience in the application of this technique in the management of nonneoplastic occupational and environmental diseases of the lung and pleura. This review focuses on the cytologic characteristics of a variety of occupational lung diseases, grouping them into 2 broad diagnostic categories: reactive cellular changes and noncellular elements. The former includes entities such as reactive mesothelial proliferation, goblet cell metaplasia, Creola bodies, and reserve cell hyperplasia, and the latter encompasses Curschmann spirals, Charcot-Leyden crystals, and asbestos bodies. Objective.—To illustrate the cytologic features of several nonneoplastic occupational and environmental diseases and correlate the cytology with various etiologic agents. Data Sources.—Case-derived material and literature review. Conclusions.—The role of cytology in the diagnosis of nonneoplastic occupational and environmental lung diseases is limited. This may be because more than one agent can elicit a similar host reaction and/or the offending agent can be associated with more than one pathologic process. However, in the appropriate clinical and radiographic setting, the cytology can render valuable diagnostic information. Examples include pulmonary alveolar proteinosis in patients with acute silicoproteinosis and asbestos bodies in bronchoalveolar lavage samples of patients with asbestos exposure.

scholarly journals The role of RDoC in future classification of mental disorders

2020 ◽  
Vol 22 (1) ◽  
pp. 81-85 ◽  
Keyword(s):  
Mental Health ◽  
Affective Behavior ◽  
Research Domain Criteria ◽  
Computational Approaches ◽  
Diagnostic Categories ◽  
Key Features ◽  
Study Designs ◽  
Research Domain

The Research Domain Criteria (RDoC) project constitutes a translational framework for psychopathology research, initiated by the National Institute of Mental Health in an attempt to provide new avenues for research to circumvent problems emerging from the use of symptom-based diagnostic categories in diagnosing disorders. The RDoC alternative is a focus on psychopathology based on dimensions simultaneously defined by observable behavior (including quantitative measures of cognitive or affective behavior) and neurobiological measures. Key features of the RDoC framework include an emphasis on functional dimensions that range from normal to abnormal, integration of multiple measures in study designs (which can foster computational approaches), and high priority on studies of neurodevelopment and environmental influences (and their interaction) that can contribute to advances in understanding the etiology of disorders throughout the lifespan. The paper highlights key implications for ways in which RDoC can contribute to future ideas about classification, as well as some of the considerations involved in translating basic behavioral and neuroscience data to psychopathology.

scholarly journals Mice tune out not in: Violation of prediction drives auditory saliency

2019 ◽  
Author(s):  
Meike M. Rogalla ◽  
Inga Rauser ◽  
Karsten Schulze ◽  
Lasse Osterhagen ◽  
K Jannis Hildebrandt
Keyword(s):  
Auditory Processing ◽  
Choice Model ◽  
Short Term ◽  
Probabilistic Choice ◽  
Auditory Detection ◽  
Irrelevant Distractors ◽  
Serial Correlations ◽  
Low Probability ◽  
Psychophysical Studies

SummarySuccessful navigation in complex acoustic scenes requires focusing on relevant sounds while ignoring irrelevant distractors. It has been argued that the ability to track stimulus statistics and generate predictions supports the choice what to attend and what to ignore. However, the role of these predictions about future auditory events in drafting decisions remains elusive. While most psychophysical studies in humans indicate that expected stimuli serve as implicit cues attracting attention, most work studying physiological auditory processing in animals highlights the detection of unexpected, surprising stimuli. Here, we tested whether in the mouse, target probability is used as an implicit cue attracting attention or whether detection is biased towards low-probability deviants using an auditory detection task. We implemented a probabilistic choice model to investigate whether a possible dependence on stimulus statistics arises from short term serial correlations or from integration over longer periods. Our results demonstrate that target detectability in mice decreases with increasing probability, contrary to humans. We suggest that mice indeed track probability over a time scale of at least several minutes but do not use this information in the same way as humans do: instead of maximizing reward by focusing on high-probability targets, the saliency of a target is determined by surprise.

scholarly journals Colour Ambiguity in Real Scenes and the Role of Perceptual Organisation

2021 ◽  
Author(s):  
Annette Werner ◽  
Alisa Schmidt ◽  
Julian Hilmers ◽  
Lukas Boborzi ◽  
Manuela Weigold
Keyword(s):  
Light Source ◽  
Explicit Knowledge ◽  
Local Region ◽  
Light Blue ◽  
The Real ◽  
Quantitative Measurements ◽  
Real Scene ◽  
Neural Processes ◽  
High Level

AbstractIn this study we show a reproduction of the dress-ambiguity phenomenon in a real scene and we report quantitative measurements of the corresponding colour perceptions. The original, real dress, known from #thedress-illusion, was illuminated by combined short- and longwavelength broadband lights from two slide projectors. Test subjects viewing the dress reported to perceive the dress’ fabric and lace colours as blue & black, white & gold or light blue & brown; their corresponding perceptual matches were distributed along the blue/yellow cardinal axis, and exhibited a variability comparable to the ambiguity of the dress photograph. It is particularly noteworthy that the colour ambiguity emerged despite explicit knowledge of the observers about the direction of the light source. Manipulating the background of the real dress (change in chromaticity and luminance, or masking) revealed significant differences between the perceptual groups regarding lightness and colour of the dress. Our findings suggest that observer specific differences in the perceptual organisation of the visual scene are responsible for the colour ambiguity observed for the real dress; in particular, we conclude that colour computations of white & gold viewers focused onto the local region of the dress, whereas the colour processes of blue & black and light-blue & brown viewers were strongly influenced by contextual computations including the background. Our segmentation hypothesis extends existing explanations for the dress’ ambiguity and proposes image based (in the case of the real scene) and high level (in the case of the photograph) neural processes which control the spatial reach of contextual colour computations. The relation between the ambiguity in our real scene and the dress photograph is discussed.

scholarly journals Using satellite images in teaching geography at school

2020 ◽  
Keyword(s):  
Satellite Images ◽  
Visual Image ◽  
Dust Storms ◽  
Advantages And Disadvantages ◽  
The Earth ◽  
Atmospheric Fronts ◽  
History Of ◽  
Memory Representations ◽  
Control Knowledge

Satellite images occupy a signifi cant place in the Earth Sciences. This fully applies to geography. Images of the Earth from space are used in various activities: to assess crops, to establish the boundaries of a phenomenon, to determine the degree of contamination of land or ocean surfaces, to search for minerals, and so on. But in school geography, satellite images are used very rarely - for example, to prove the sphericity of the Earth or to show the view of each continent from space. The purpose of this article is to highlight the methods of using satellite images in geography lessons at school and to create tasks based on these means of training. Main material. The history of using satellite images in school geography has been considered in the article. Advantages and disadvantages of satellite images as training tools are also noted. The role of satellite images in the formation of geographical representations is highlighted by the authors. These images realistically depict many natural phenomena (atmospheric fronts, cyclones, dust storms, etc.). Therefore, as a means of visualization, they contribute to the formation of memory representations in schoolchildren. Examples of a number of satellite images show how they can be used in teaching geography. The article off ers a methodical way of the use of satellite images at diff erent stages of learning. These images can be used to explain the training material, repeat it, control knowledge, and so on. Satellite images can be used to solve cartographic tasks. As practice has shown, we can perform creative tasks based on images. Conclusions. Satellite images play an important role in the system of teaching geography. The use of satellite images allows us to improve the pupils’ interest in the subject. Satellite images form geographical memory representations create a visual image of the natural appearance of the Earth. The study of educational opportunities of the Earth’s images from space has revealed three groups of requirements: pedagogical, technical and specific, determined by the content of school geography. The teacher should select satellite images based on the content of educational tasks of school geography.

Unnatural Pumas and Domestic Foxes: Relations with Protected Predators and Conspiratorial Rumours in Southern Chile

2021 ◽  
Author(s):  
Pelayo Benavides ◽  
Julián Caviedes
Keyword(s):  
Ethnographic Study ◽  
Power Dynamics ◽  
Southern Chile ◽  
Critical Aspect ◽  
State Institutions ◽  
Human Animal ◽  
Spatial Ordering ◽  
One Year ◽  
Wild Predators

Human–wildlife conflicts involving protected predators are a major social and environmental problem worldwide. A critical aspect in such conflicts is the role of state institutions regarding predators’ conservation, and how this is construed by affected local populations. These interpretations are frequently embodied in conspiratorial rumours, sharing some common traits related to wild and domestic categories, spatial ordering and power relations. In southern Chile, a one-year, multi-sited ethnographic study of human–animal relations in and adjacent to protected areas was undertaken, foregrounding conspiratorial rumours concerning protected predators. Through an analysis of this study and related international cases, this article argues that the uncritical dismissal of rumours and the categories used to interpret such conflicts have detrimental impacts on the conservation of wild predators. Such rumours should be understood as significant comment devices within human–animal relations and the power dynamics that frame human groups affected by them.

scholarly journals MS CD49d+CD154+ Lymphocytes Reprogram Oligodendrocytes into Immune Reactive Cells Affecting CNS Regeneration

Cells ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 1508 ◽  
Author(s):  
Paweł Piatek ◽  
Magdalena Namiecinska ◽  
Małgorzata Domowicz ◽  
Patrycja Przygodzka ◽  
Marek Wieczorek ◽  
...  
Keyword(s):  
Basic Protein ◽  
Proteolipid Protein ◽  
Critical Aspect ◽  
Autoimmune Encephalomyelitis ◽  
Circulating Lymphocytes ◽  
Oligodendrocyte Precursor ◽  
Cellular Pathways ◽  
Cytokine Synthesis ◽  
Experimental Autoimmune

The critical aspect in multiple sclerosis (MS) progression involves insufficient regeneration of CNS resulting from deficient myelin synthesis by newly generated oligodendrocytes (OLs). Although many studies have focused on the role of autoreactive lymphocytes in the inflammatory-induced axonal loss, the problem of insufficient remyelination and disease progression is still unsolved. To determine the effect of myelin-specific lymphocytes on OL function in MS patients and in a mouse model of MS, we cultured myelin induced MS CD49d+CD154+ circulating lymphocytes as well as Experimental Autoimmune Encephalomyelitis (EAE) mouse brain-derived T and memory B cells with maturing oligodendrocyte precursor cells (OPCs). We found that myelin-specific CD49d+CD154+ lymphocytes affected OPC maturation toward formation of immune reactive OLs. Newly generated OLs were characterized by imbalanced myelin basic protein (MBP) and proteolipid protein (PLP) production as well as proinflammatory chemokine/cytokine synthesis. The analysis of cellular pathways responsible for OL reprogramming revealed that CD49d+CD154+ lymphocytes affected miRNA synthesis by dysregulation of polymerase II activity. miR-665 and ELL3 turned out to be the main targets of MS myelin-specific lymphocytes. Neutralization of high intracellular miR-665 concentration restored miRNA and MBP/PLP synthesis. Together, these data point to new targets for therapeutic intervention promoting CNS remyelination.

Sign in / Sign up

Export Citation Format

Share Document