An Analysis of Theoretical Approaches to Geometrical-Optical Illusions

Author(s):  
Barbara Gillam

The geometrical optical illusions, such as the Müller-Lyer and the Poggendorff, are simple line drawings, which demonstrate errors as large as 25% when people are asked to match their properties such as size, angles, and line collinearity. They have been tantalizing people for at least 150 years and are still not really understood. Illusion figures have been used to probe the consistency of different perceptual properties and also of perception and action with implications for the theory of two visual systems. Explanations of geometrical illusions tend to invoke either physiological processes or the functional role illusion responses may have when viewing a 3D scene. This chapter examines all of these theoretical issues, discussing evidence for and against the major theories.

2002 ◽  
Vol 25 (1) ◽  
pp. 117-118
Author(s):  
Wayne Shebilske

Norman relates two theoretical approaches, the constructivist and ecological, to two cortical visual streams, the ventral and dorsal systems, respectively. This commentary reviews a similar approach in order to increase our understanding of complex skill development and to advance Norman's goal of stimulating and guiding research on the two theoretical approaches and the two visual systems.


Author(s):  
Yakov G. Testelets ◽  

Vladimir M. Alpatov’s new monograph addresses typological and theoretical issues related to the basic morphological units – word and parts of speech. It elaborates on his previous work on morphological theory, typology, and historiography of linguistic traditions. The monograph consists of an introduction and three chapters. The first two chapters, “The Problem of Word” and “The Problem of Parts of Speech” address the differences in theoretical approaches, evidence from independent linguistic traditions with particular reference to the Japanese indigenous linguistics, and data from psycholinguistic research. In the third chapter, “Anthropocentric and systemocentric approaches to language”, the author claims that the morphological logocentric and non-logocentric approaches are instances of the two more general approaches to language, respectively. In spite of some criticism, the reviewer concludes that the monograph makes much progress in understanding the structure and typology of the morphological elements, and similarities and difference among national linguistic traditions and grammatical theories.


Author(s):  
Christina L. Gagné

Psycholinguistics is the study of how language is acquired, represented, and used by the human mind; it draws on knowledge about both language and cognitive processes. A central topic of debate in psycholinguistics concerns the balance between storage and processing. This debate is especially evident in research concerning morphology, which is the study of word structure, and several theoretical issues have arisen concerning the question of how (or whether) morphology is represented and what function morphology serves in the processing of complex words. Five theoretical approaches have emerged that differ substantially in the emphasis placed on the role of morphemic representations during the processing of morphologically complex words. The first approach minimizes processing by positing that all words, even morphologically complex ones, are stored and recognized as whole units, without the use of morphemic representations. The second approach posits that words are represented and processed in terms of morphemic units. The third approach is a mixture of the first two approaches and posits that a whole-access route and decomposition route operate in parallel. A fourth approach posits that both whole word representations and morphemic representations are used, and that these two types of information interact. A fifth approach proposes that morphology is not explicitly represented, but rather, emerges from the co-activation of orthographic/phonological representations and semantic representations. These competing approaches have been evaluated using a wide variety of empirical methods examining, for example, morphological priming, the role of constituent and word frequency, and the role of morphemic position. For the most part, the evidence points to the involvement of morphological representations during the processing of complex words. However, the specific way in which these representations are used is not yet fully known.


Author(s):  
Jim Wood ◽  
Neil Myler

The topic “argument structure and morphology” refers to the interaction between the number and nature of the arguments taken by a given predicate on the one hand, and the morphological makeup of that predicate on the other. This domain turns out to be crucial to the study of a number of theoretical issues, including the nature of thematic representations, the proper treatment of irregularity (both morphophonological and morphosemantic), and the very place of morphology in the architecture of the grammar. A recurring question within all existing theoretical approaches is whether word formation should be conceived of as split across two “places” in the grammar, or as taking place in only one.


2021 ◽  
Vol 39 (1) ◽  
pp. 146-174
Author(s):  
Irina Starodubrovskaya ◽  

This article discusses theoretical issues behind the current shift in the policy of European states towards Islamic communities. The shift is driven by the idea that the values of political Islam are incompatible with Western values; that the main driver behind radicalization is ideology and that even non‑violent Islamists gradually prepare the Muslim youth to embracing violence. Based on current academic discussions as well as the results of the author’s own research, the author concludes that the opponents of these ideas have serious counter‑ arguments. In their views, radicalization can be explained by a wide range of different factors. Violent and non‑violent Islamists compete for the audience, and therefore, not only can non‑violent Islamists embrace jihadist views but also, vice versa, some jihadists can change their position to non‑violence. Moreover, Muslim values, as well as those of the Islamists, are not necessarily antagonistic in all their aspects with the values of Western democracies. Various theoretical approaches form the basis for an alternative program of practical measures that could be implemented in the future.


2021 ◽  
Vol 1 (1) ◽  
pp. 4-8
Author(s):  
O. I. ZHITYAEVA ◽  

The increased attention to the theoretical issues of activation of innovation processes in the industrial sector is caused by various factors of influence, and primarily by the elimination of the technological gap between Russia and developed foreign industrial countries. To solve this problem, the author suggests focusing the priorities of innovation activity on the activation of high-tech industries. It is shown that domestic enterprises have come close to intensifying the search, development and implementation of the latest technologies, and activation of innovative activities. According to the author, the innovative activity of industrial enterprises primarily depends on the structure of production, enterprise management and organization of innovative activities.


2017 ◽  
Vol 2017 ◽  
pp. 1-22 ◽  
Author(s):  
Nasim Nematzadeh ◽  
David M. W. Powers

Geometrical illusions are a subclass of optical illusions in which the geometrical characteristics of patterns in particular orientations and angles are distorted and misperceived as a result of low-to-high-level retinal/cortical processing. Modelling the detection of tilt in these illusions, and its strength, is a challenging task and leads to the development of techniques that explain important features of human perception. We present here a predictive and quantitative approach for modelling foveal and peripheral vision for the induced tilt in the Café Wall illusion, in which parallel mortar lines between shifted rows of black and white tiles appear to converge and diverge. Difference of Gaussians is used to define a bioderived filtering model for the responses of retinal simple cells to the stimulus, while an analytical processing pipeline is developed to quantify the angle of tilt in the model and develop confidence intervals around them. Several sampling sizes and aspect ratios are explored to model variant foveal views, and a variety of pattern configurations are tested to model variant Gestalt views. The analysis of our model across this range of test configurations presents a precisely quantified comparison contrasting local tilt detection in the foveal sample sets with pattern-wide Gestalt tilt.


1974 ◽  
Vol 38 (1) ◽  
pp. 188-190 ◽  
Author(s):  
Pauline A. Jones

This study examined susceptibility to optical illusions by Ss who experienced differing ecologies, and tested the hypothesis that Ss exposed to greater cultural stimulus give more 3-dimensional interpretations to pictorial material. Three samples of Grade VI boys, matched for family occupational status, were selected. An urban sample was contrasted with each of two samples from small, isolated fishing communities. The physical environment of the urban sample was carpentered and, in contrast with the fishing communities, lacked open vistas over water. While the “carpentered world” hypothesis was not supported, partial support was obtained for the hypothesis that Ss exposed to open vistas are more susceptible to the horizontal-vertical illusion. Also, urban Ss who were exposed to greater cultural stimulus gave more 3-dimensional interpretations on the Depth Perception Test.


Author(s):  
Raelene M. Inglis ◽  
Siân E. Halcrow

Over the past two decades, there has been a rapid increase of research in the study of children and childhood in the past from anthropological, archaeological, and bioarchaeological perspectives. Despite recent research and theoretical developments, the advancement of research into childhood in the past continues to be somewhat hampered by the disparate theoretical approaches that are applied. This chapter reviews both the development of the bioarchaeological study of childhood and the important theoretical issues – including age, gender, and biocultural approaches – and offers suggestions for the development of approaches that “speak” between the different theoretical perspectives in the study of childhood in the past. Suggested future research directions include the integration of biological aspects into the social life course approach, by incorporating aspects of the biologically underpinned life history theoretical approach. Another imperative is to critically evaluate the attribution and meaning of “agency” in the bioarchaeology of childhood.


Author(s):  
Andrew Spencer

The chapter contrasts the still popular traditional approach to morphology, based on the classical morpheme concept, with contemporary approaches which significantly modify that concept (Distributed Morphology, Construction Morphology) or reject it altogether (Paradigm Function Morphology, Network Morphology). I extend the scope of the latter, ‘lexeme-and-paradigm’, models by introducing types of morphology intermediate between inflection and derivation: argument-structure alternations and transpositions (such as deverbal participles), together with other problematic phenomena such as clitics, light verbs, periphrasis. The chapter ends with a discussion of derivational morphology as a subtype of lexemic relatedness, briefly outlining the principal theoretical issues facing approaches to lexemic relatedness and lexical representation: ‘blocking’, semantic primitives, lexical semantics, and derivation.


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