3. Lightness and colour

Perception: A Very Short Introduction ◽

10.1093/actrade/9780198791003.003.0003 ◽

2017 ◽

pp. 29-49

Author(s):

Brian Rogers

Keyword(s):

Visual Perception ◽

Ecological Niche ◽

Perceptual System ◽

Perceptual Characteristics

‘Lightness and colour’ considers visual perception and attempts to identify some of the characteristics of the patterns of light reaching our eyes that might contribute to the information we need for survival. It discusses trichromatic vision in humans; the problem of metamerism; and the implications trichromacy has for the ability to describe and differentiate colours, including intensity, hue, and saturation. The pick-up of particular perceptual characteristics—the lightness and colour of the surfaces that surround us—should not be thought of as ends in themselves, but rather as a contribution to a perceptual system that has evolved to allow us to act successfully in a particular ecological niche.

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Optic Flow: Perceiving and Acting in a 3-D World

i-Perception ◽

10.1177/2041669520987257 ◽

2021 ◽

Vol 12 (1) ◽

pp. 204166952098725

Author(s):

Brian Rogers

Keyword(s):

Visual Perception ◽

Optic Flow ◽

Ecological Niche ◽

Perception And Action ◽

Ecological Approach ◽

Visual World ◽

Changing Patterns ◽

The Many ◽

Concept Of Information ◽

Radical Ideas

In 1979, James Gibson completed his third and final book “The Ecological Approach to Visual Perception”. That book can be seen as the synthesis of the many radical ideas he proposed over the previous 30 years – the concept of information and its sufficiency, the necessary link between perception and action, the need to see perception in relation to an animal's particular ecological niche and the meanings (affordances) offered by the visual world. One of the fundamental concepts that lies beyond all of Gibson's thinking is that of optic flow: the constantly changing patterns of light that reach our eyes and the information it provides. My purpose in writing this paper has been to evaluate the legacy of Gibson's conceptual ideas and to consider how his ideas have influenced and changed the way we study perception.

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Visual perception of surface properties through manipulation

Color and Imaging Conference ◽

10.2352/issn.2169-2629.2021.29.66 ◽

2021 ◽

Vol 2021 (29) ◽

pp. 66-70

Author(s):

James A. Ferwerda ◽

Snehal A. Padhye

Keyword(s):

Visual Perception ◽

Real Time ◽

Surface Properties ◽

Perceptual System ◽

Display System ◽

Apple Ipad ◽

Purposeful Behavior ◽

Novel Method ◽

Display Systems

Vision is a component of a perceptual system whose function is to support purposeful behavior. In this project we studied the perceptual system that supports the visual perception of surface properties through manipulation. Observers were tasked with finding dents in simulated flat glossy surfaces. The surfaces were presented on a tangible display system implemented on an Apple iPad, that rendered the surfaces in real time and allowed observers to directly interact with them by tilting and rotating the device. On each trial we recorded the angular deviations indicated by the device's accelerometer and the images seen by the observer. The data reveal purposeful patterns of manipulation that serve the task by producing images that highlight the dent features. These investigations suggest the presence of an active visuo-motor perceptual system involved in the perception of surface properties, and provide a novel method for its study using tangible display systems

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Visual perceptual characteristics of developmental disorders on the Frostig Developmental Test of Visual Perception

The Proceedings of the Annual Convention of the Japanese Psychological Association ◽

10.4992/pacjpa.78.0_2am-1-042 ◽

2014 ◽

Vol 78 (0) ◽

pp. 2AM-1-042-2AM-1-042

Author(s):

Hirosuke Kashiwagi

Keyword(s):

Visual Perception ◽

Developmental Disorders ◽

Developmental Test ◽

Perceptual Characteristics

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The Process of ‘Taking-into-Account’ in Visual Perception

Perception ◽

10.1068/p020267 ◽

1973 ◽

Vol 2 (3) ◽

pp. 267-285 ◽

Cited By ~ 145

Author(s):

W Epstein

Keyword(s):

Information Processing ◽

Visual Perception ◽

Perceptual System ◽

The State ◽

Processing Sequence ◽

Salient Features ◽

Combine Information ◽

Distal Variable ◽

Combinatorial Process

In order to secure useful information the perceptual system must combine information present in the retinal counterpart of the to-be-discriminated distal variable with information about other variables that affect the state of the retinal counterpart. This combinatorial process may be called—following Woodworth's lead—the process of ‘taking-into-account’. Seven applications of the ‘taking-into-account’ hypothesis are described. Salient features of the hypothesis are examined and the empirical status of the hypothesis is summarized and evaluated. Finally a model of the information-processing sequence suggested by the hypothesis is presented.

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Perceptual Narrative Layer in Muriel Spark’s Story “The Dark Glasses”

Vestnik of Northern (Arctic) Federal University. Series Humanitarian and Social Sciences ◽

10.37482/2687-1505-v073 ◽

2021 ◽

pp. 41-49

Author(s):

Bakhyt N. Zhanturina ◽

Keyword(s):

Visual Perception ◽

Short Story ◽

Perceptual System ◽

Point Of View ◽

Visual Metaphors ◽

Semantic Fields ◽

The Subject ◽

Complex Structural ◽

Optic Array ◽

Colour Terms

The article deals with the visual perception layer in Muriel Spark’s short story “The Dark Glasses” with the aim of carrying out a conceptual analysis of this text. Meaning generation models have already been demonstrated as multilayer non-homogeneous structures describing different points of view and different narrative layers in B. Uspensky’s, G. Genette’s and W. Schmid’s theories. The text as a complex structural language unit can, like the word, vary in different semantic fields. This article presents the spatial, temporal, ideological, and linguistic narrative layers according to the dominant visual perception layer in the protagonist-narrator’s internal point of view expressed in the story. The perceptual layer is demonstrated on the basis of the cognitive process in visual perception, namely, the optic array and human perceptual system. The optic array is implied in the story’s composition as a framed closed structure comprising two texts: the frame and the embedded text. Both of them follow the subject-object model of perception and are organized according to the principles of reflectivity, doubling, and copying. The perceptual system is expressed through various language units: simple verbal predicates see, look and a set of verbs of perception, substantives eyes, glasses and their direct (initial) and figurative meanings, colour terms based on adjectives in descriptions of the characters, as well as conceptual archetypal visual metaphors from the light–dark family, and metonymies based on causal and partitive semantic relations.

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What Have We Learned From Physiological Approaches to Characterizing Dysarthria and Other Speech Production Disorders?

Perspectives on Speech Science and Orofacial Disorders ◽

10.1044/ssod20.2.37 ◽

2010 ◽

Vol 20 (2) ◽

pp. 37-46

Author(s):

Nicole M. Etter

Keyword(s):

Speech Production ◽

Speech Disorders ◽

Research Literature ◽

Systematic Research ◽

Physiological Measures ◽

Validity And Reliability ◽

Assessment Measures ◽

Perceptual Assessment ◽

Perceptual Characteristics ◽

Diagnostic Resolution

Traditionally, speech-language pathologists (SLP) have been trained to develop interventions based on a select number of perceptual characteristics of speech without or through minimal use of objective instrumental and physiologic assessment measures of the underlying articulatory subsystems. While indirect physiological assumptions can be made from perceptual assessment measures, the validity and reliability of those assumptions are tenuous at best. Considering that neurological damage will result in various degrees of aberrant speech physiology, the need for physiologic assessments appears highly warranted. In this context, do existing physiological measures found in the research literature have sufficient diagnostic resolution to provide distinct and differential data within and between etiological classifications of speech disorders and versus healthy controls? The goals of this paper are (a) to describe various physiological and movement-related techniques available to objectively study various dysarthrias and speech production disorders and (b) to develop an appreciation for the need for increased systematic research to better define physiologic features of dysarthria and speech production disorders and their relation to know perceptual characteristics.

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