Poorly saturated colors are closer to a pure grey than strongly saturated ones and, therefore, appear less “colorful”. Color saturation is effectively manipulated in the visual arts for balancing conflicting sensations and moods and for inducing the perception of relative distance in the pictorial plane. While perceptual science has proven quite clearly that the luminance contrast of any hue acts as a self-sufficient cue to relative depth in visual images, the role of color saturation in such figure-ground (...) class='Hi'>organization has remained unclear. We presented configurations of colored inducers on grey ‘test’ backgrounds to human observers. Luminance and saturation of the inducers was uniform on each trial, but varied across trials. We ran two separate experimental tasks. In the relative background brightness task, perceptual judgments indicated whether the apparent brightness of the grey test background contrasted with, assimilated to, or appeared equal (no effect) to that of a comparison background with the same luminance contrast. Contrast polarity and its interaction with color saturation affected response proportions for contrast, assimilation and no effect. In the figure-ground task, perceptual judgments indicated whether the inducers appeared to lie in front of, behind, or in the same depth with the background. Strongly saturated inducers produced significantly larger proportions of foreground effects indicating that these inducers stand out as figure against the background. Weakly saturated inducers produced significantly larger proportions of background effects, indicating that these inducers are perceived as lying behind the backgrounds. We infer that color saturation modulates figure-ground organization, both directly by determining relative inducer depth, and indirectly, and in interaction with contrast polarity, by affecting apparent background brightness. The results point towards a hitherto undocumented functional role of color saturation in the genesis of form, and in particular figure-ground percepts in the absence of chromatostereopsis. (shrink)

There are few articles in science that remain relevant over a span of 100 years; Max Wertheimer's pioneering experimental studies on apparent motion and figural organization are notable exceptions. Wertheimer's 1912 account of motion perception started a revolution and established the Gestalt school of psychology. It also paved the way for further investigations of apparent motion perception, including subsequent research by Oliver Braddick, Stuart Anstis, Vilaynur Ramachandran, and others. Wertheimer's 1923 article on figural organization helped define grouping as (...) a principle of figure-ground perception. This book provides contemporary readers and researchers with Wertheimer's two pivotal articles, newly translated into English and each accompanied by a synopsis, and two essays on apparent motion and figural organization that describe the long-term impact of Wertheimer's work. The translation of the original German into readable English prose allows English-language readers for the first time to appreciate Wertheimer's visionary ideas. The accompanying essays tie Wertheimer's phenomenological descriptions to the underlying neuronal mechanisms, bridging the years between the articles' first publication and modern research. (shrink)

Although symmetry has been discussed in terms of a major law of perceptual organization since the early conceptual efforts of the Gestalt school (Wertheimer, Metzger, Koffka and others), the first quantitative measurements testing for effects of symmetry on processes of Gestalt formation have seen the day only recently. In this study, a psychophysical rating study and a “foreground”-“background” choice response time experiment were run with human observers to test for effects of bilateral symmetry on the perceived strength of (...) class='Hi'>figure-ground in triangular Kanizsa configurations. Displays with and without bilateral symmetry, identical physically-specified-to-total contour ratio, and constant local contrast intensity within and across conditions, but variable local contrast polarity and variable orientation in the plane, were presented in a random order to human observers. Configurations with bilateral symmetry produced significantly stronger figure-ground percepts reflected by greater subjective magnitudes and consistently higher percentages of “foreground” judgments accompanied by significantly shorter response times. These effects of symmetry depend neither on the orientation of the axis of symmetry, nor on the contrast polarity of the physical inducers. It is concluded that bilateral symmetry, irrespective of orientation, significantly contributes to the, largely sign-invariant, visual mechanisms of figure-ground segregation that determine the salience of figure-ground in perceptually ambiguous configurations. (shrink)

Engagement is important to the success of applications, systems and artefacts as diverse as robotics, pedagogy, games, interactive installations, and virtual reality applications. Yet engagement has proved to be remarkably difficult to define as it can take many forms, so many that it is difficult to isolate what these different instantiations have in common. Instead of pursuing an empirical perspective, the human side of engagement, namely, involvement is considered from a broadly Heideggerian perspective. As Heidegger has a deserved reputation for (...) philosophical obscurity, all of the concepts adopted from his work are mapped onto the more familiar languages and vocabularies of psychology, human–computer interaction and cognitive science. It is argued that technology is engaging and our response to it is to be involved (with it). This resulting involvement–engagement dyad is thus an explicitly holistic account recognising roles for affordance, purpose, identity, affect and embodiment. (shrink)

This book is a selection of papers from a conference which took place at the University of Keele in July 1982. The conference was an extraordinarily enjoyable one, and we would like to take this opportunity of thanking all participants for helping to make it so. The conference was intended to allow scholars working on different aspects of symbolic behaviour to compare findings, to look for common ground, and to identify differences between the various areas. We hope that it (...) was successful in these aims: the assiduous reader may judge for himself. Several themes emerged during the course of the conference. Some of these were: 1. There is a distinction to be made between those symbol systems which attempt, more or less directly, to represent a state of affairs in the world (e. g. language, drawing, map and navigational skill) and those in which the representational function is complemented, if not overshadowed, by properties of the symbol system itself, and the systematic inter-relations that symbols can have to one another (e. g. music, mathematics). The distinction is not absolute, for the nature of all symbolic skills is, in part, a function of the structure of the symbolic system employed. Nonetheless, this distinction helps us to understand some common acquisition difficulties, such as that experienced in mathematics, where mental manipulation of symbols can go awry if a child assumes too close a correspondence between mathematical symbols and the world they represent. 2. (shrink)

Victor Vasarely's (1906–1997) important legacy to the study of human perception is brought to the forefront and discussed. A large part of his impressive work conveys the appearance of striking three-dimensional shapes and structures in a large-scale pictorial plane. Current perception science explains such effects by invoking brain mechanisms for the processing of monocular (2D) depth cues. Here in this study, we illustrate and explain local effects of 2D color and contrast cues on the perceptual organization in terms of (...) figure-ground assignments, i.e. which local surfaces are likely to be seen as “nearer” or “bigger” in the image plane. Paired configurations are embedded in a larger, structurally ambivalent pictorial context inspired by some of Vasarely's creations. The figure-ground effects these configurations produce reveal a significant correlation between perceptual solutions for “nearer” and “bigger” when other geometric depth cues are missing. In consistency with previous findings on similar, albeit simpler visual displays, a specific color may compete with luminance contrast to resolve the planar ambiguity of a complex pattern context at a critical point in the hierarchical resolution of figure-ground uncertainty. The potential role of color temperature in this process is brought forward here. Vasarely intuitively understood and successfully exploited the subtle context effects accounted for in this paper, well before empirical investigation had set out to study and explain them in terms of information processing by the visual brain. (shrink)

Perceptual organization comprises a wide range of processes such as perceptual grouping, figure-ground organization, filling-in, completion, and perceptual switching. The Oxford Handbook of Perceptual Organization provides a broad and extensive review of the current literature, written in an accessible form for scholars and students.

This article investigates the concept of the ground truth as both an epistemic and technical figure of knowledge that is central to discussions of machine vision and media techniques of visuality. While ground truth refers to a set of remote sensing practices, it has a longer history in operational photography, such as aerial reconnaissance. Building on a discussion of this history, this article argues that ground truth has shifted from a reference to the physical, geographical (...) class='Hi'>ground to the surface of the images echoing earlier points raised by philosopher Jean-Luc Nancy that there is a ground of the image that is central to the task of analysis beyond representational practices. Furthermore, building on the practices of pattern recognition, composite imaging, and different interpretational techniques, we discuss contemporary practices of machine learning that mobilizes geographical earth observation datasets for experimental purposes, including tests such as “fake geography” as well as artistic practices, to show how ground truth is operationalized in such contexts of AI and visual arts. (shrink)

A project manager’s emotional intelligence (EI) is essential to project success. However, the mechanism in this cause and effect remains a black box in extant literature. China is now the world’s largest construction market, and figuring out the mechanism of construction project manager’s (CPM’s) EI on project success is meaningful for developing the global construction market. This study conducted an in-depth interview with 24 CPMs with more than 5-year experience in construction project management. The grounded theory was employed to profile (...) the application of CPM’s EI and to build the multilevel mechanism that explains the influence of CPM’s EI on project success. The mechanism framework conforms to the existed input–process–output (IPO) theory. It consists of a team-level mechanism (including the positive team atmosphere, shared vision, and team cohesion) and an individual-level mechanism (i.e., organizational citizenship behavior directed at the organization, perceived supervisor support, trust in leader, and subordinate’s psychological and emotional health). This study further proposed that the effect of this mechanism does not work immediately but develops with time passing. Implications for further research and project management practice are discussed in the end. (shrink)

Figure-Ground Duality in Humour: A Multi-Modal Perspective Creativity with words or pictures is not simply a matter of communicating a message, but of communicating it well, in a way that is effective, original and which defies convention. Effectiveness here pertains to the pragmatic goals of the communicator, and the extent to which these are achieved, while originality pertains to the manner in which the message is framed. Language, for instance, provides a wealth of conventions for framing a message; (...) indeed, the vast part of language is a solidified body of culturally received conventions, which fix the meaning of words and phrases and determine the contextual appropriateness of specific terms, topics and conversational strategies. To frame a message in a novel manner that stretches or even subverts these conventions, a communicator must imbue the elements of communication—whether words, gestures or pictorial elements—with additional meanings. This duality of meaning is not arbitrary, however, or communication cannot succeed. Rather, a creative communicator must draw out secondary meanings that are already implicit in the stock elements of communication, in a way that the audience can understand, appreciate and replicate. Duality thus lies at the heart of creative communication, allowing a communicator to say one thing and simultaneously convey another, secondary message that may augment or subvert the overt content of the communication. This mechanism, which draws out and gives prominence to that which is normally unseen or implicit, is Figure-Ground Reversal. (shrink)

Summary Based on Clausius’ phrasing of a “transformational content” and the resulting 2nd law of thermodynamics, I demonstrated that Gilbert Simondon’s On the Mode of Existence of Technical Objects is historically situated at the threshold of understanding open systems thermodynamics and the related concepts of balance. Furthermore, I showed that Gestalt theory, as represented by Wolfgang Köhler, at least reproduced, if not partially anticipated or even prepared this development of 20th century thinking. Finally, I gave some short examples of how (...) Simondon applied the figure/ground distinction to human perception, memory, and a general theory of becoming and I introduced his proposal to analyse “the grounds” just as thoroughly as the laws of figuration. (shrink)

The laws which predict how the perceptual quality of figure-ground can be extracted from the most elementary visual signals were discovered by the Gestaltists, and form an essential part of their movement (see especially Metzger, 1930, and Wertheimer, 1923 translated and re-edited by Lothar Spillmann, 2009 and 2012, respectively). Distinguishing figure from ground is a prerequisite for perception of both form and space (the relative positions, trajectories, and distances of objects in the visual field. The human (...) brain has an astonishing capacity for selecting and combining a few critical visual signals to accurately represent both form and space. (shrink)

A fundamental fact about human minds is that they are never truly alone: all minds are steeped in situated interaction. That social interaction matters is recognized by any experimentalist who seeks to exclude its influence by studying individuals in isolation. On this view, interaction complicates cognition. Here, we explore the more radical stance that interaction co-constitutes cognition: that we benefit from looking beyond single minds toward cognition as a process involving interacting minds. All around the cognitive sciences, there are approaches (...) that put interaction center stage. Their diverse and pluralistic origins may obscure the fact that collectively, they harbor insights and methods that can respecify foundational assumptions and fuel novel interdisciplinary work. What might the cognitive sciences gain from stronger interactional foundations? This represents, we believe, one of the key questions for the future. Writing as a transdisciplinary collective assembled from across the classic cognitive science hexagon and beyond, we highlight the opportunity for a figure-ground reversal that puts interaction at the heart of cognition. The interactive stance is a way of seeing that deserves to be a key part of the conceptual toolkit of cognitive scientists. (shrink)

We propose a new masking technique for masking word stimuli. Drawing on the phenomena of metacontrast and paracontrast, we alternately presented two prime displays of the same word with the background color in one display matching the font color in the other display and vice versa. The sequence of twenty alterations was sandwich-masked by structure masks. Using this masking technique, we conducted evaluative priming experiments with positive and negative target and prime words. Significant priming effects were found – for primes (...) and targets drawn from the same as well as from different word sets. Priming effects were independent of prime discrimination performance in direct tests and they were still significant after the sample was restricted to those participants who showed random responding in the direct test. (shrink)

This paper is a systematic investigation of motion expressions in programmatic music description. To address issues with defining the Source MOTION and the Target MUSIC, we utilize Gestalt models (Figure-Ground and Source-Path-Goal) while also critically examining the ontological complexity of the Target MUSIC. We also investigate music motion descriptions considering the role of the describer’s perspective and communicative goals. As previous research has demonstrated, an attentional Goal-bias is common in physical motion description, yet this has been found also (...) to lessen due to audience accommodation effects. We investigate whether this also occurs in music description. Using cognitive linguistic frameworks, we conducted an analysis of 21 English speakers’ written descriptions of dynamic orchestral excerpts. All participants gave a description of one excerpt reporting their own personal experiences and the other excerpt reporting the events of the excerpt for a fictional future participant. We find that addressee accommodation shapes the choice of the ontological types of Figures used from being more subjective and creative in describing music for oneself versus being more objective in describing music for others. However, our investigation does not find sufficient evidence for a Goal-bias in music like there is in physical motion event descriptions. (shrink)