Modeling geometric–optical illusions: A variational approach

Visual distortions of perceived lengths, angles, or forms, are generally known as “geometric–optical illusions” (goi). In the present paper we focus on a class of gois where the distortion of a straight line segment (the “target” stimulus) is induced by an array of non-intersecting curvilinear elements (“context” stimulus). Assuming local target–context interactions in a vector field representation of the context, we propose to model the perceptual distortion of the target as the solution to a minimization problem in the calculus of variations. We discuss properties of the solutions and reproduction of the respective form of the perceptual distortion for several types of contexts. Moreover, we draw a connection between the interactionist model of gois and Riemannian geometry: the context stimulus is understood as perturbing the geometry of the visual field from which the illusory distortion naturally arises. The approach is illustrated by data from a psychophysical experiment with nine subjects and six different contexts.     

Hope,religiosity, and subjective well-being

This study explored the relationship between religiosity, hope, and subjective well-being among 430 South African university students (n = 324) and their family members (n = 104) (70.2% female; 88.4% black; 8.4% white). Data were gathered utilising measures of religiosity, hope, satisfaction with life, and affect balance. We applied structural equation modelling to examine both the direct effects of religiosity on hope, as well as the indirect effects of religiosity on life satisfaction and positive and negative affect via hope as mediator. Findings suggest pathway and agency hope to mediate the relationships between religiosity and life satisfaction, positive affect, and negative affect. Specifically, religiosity predicted higher levels of life satisfaction and positive affect, and lower levels of negative affect via agency hope. The results suggest agency hope to mediate the relationship between religiosity and subjective well-being.     

Hegel on Kant's Analytic–Synthetic Distinction

In this paper, I argue, first, that Hegel defended a version of the analytic/synthetic distinction—that, indeed, his version of the distinction deserves to be called Kantian. For both Kant and Hegel, the analytic/synthetic distinction can be explained in terms of the discursive character of cognition: insofar as our cognition is discursive, its most basic form can be articulated in terms of a genus/species tree. The structure of that tree elucidates the distinction between analytic and synthetic judgments. Second, I argue that Hegel has an interesting and so far unexplored argument for the analytic/synthetic distinction: Hegel argues that the systematic relationship between concepts expressed in a genus/species tree can only be expressed through synthetic judgments. Third and finally, I explore some of the implications that the arguments in the first two parts of the essay have for understanding the way in which Hegel differs from Kant. I argue that Hegel accepts Kant's point that discursive cognition cannot be used to cognize the absolute. However, Hegel thinks that we can, nevertheless, cognize the absolute. I explore the character of this non‐discursive cognition and argue that we can understand Hegel's glosses on this form of cognition—as simultaneously analytic and synthetic and as having a circular structure—through contrasting it with his account of discursive cognition. As a consequence, I argue that we must give up on attempts to understand ‘the dialectical method’ and ‘speculative cognition’ on the model of discursive cognition.     

A Longitudinal Study of Relational Aggression, Physical Aggression, and Children's Social–Psychological Adjustment

Although great strides have recently been made in our understanding of relational aggression and its consequences, one significant limitation has been the lack of prospective studies. The present research addressed this issue by identifying and assessing groups of relationally aggressive, physically aggressive, relationally plus physically aggressive (co-morbid), and nonaggressive children during their third grade year in elementary school and then reassessing them a year later, during fourth-grade (N = 224, 113 girls). Two aspects of social–psychological adjustment were assessed during both assessment periods including internalizing difficulties (i.e., withdrawal, depression/anxiety, and somatic complaints) and externalizing problems (i.e., aggressive behavior, delinquency). It was revealed that the strongest predictor of future social–psychological adjustment problems and increases in these problems from third to fourth was the combination of relational and physical aggression. Relational aggression also contributed unique information, relative to physical aggression, in the prediction of future maladjustment. Implications of these findings for future research and prevention efforts, particularly for aggressive girls, are discussed.

The Legacy of Neoplatonism in F. W. J. Schelling's Thought

F.W.J. Schelling, one of the essential thinkers in the development of German Idealism, formed his own thought not only in a critical dialogue with Kant's and Fichte's transcendentalism and Hegel's earlier conception of thinking, but also in an intensive discussion with Plato and Aristotle. Over and above that, Neoplatonism – especially Plotinus, Proclus and the Christian Dionysius the Areopagite – played a decisive role in Schelling's reception and transformation of ancient philosophy. Selecting the manifold aspects which could be reflected on in this field, I want to make plausible as a transcendental analogy to Plotinus' concept of self-knowledge Schelling's requirement for a raising-up and transformation of the finite 'I' into the form of the Absolute, whose central features converge with the goal of the Plotinian self – transformation of thought into a timeless self-thinking and its ground. A main part of this paper discusses Schelling's and Plotinus' concept of nature as a dynamic process constituted by an immanent 'creating theoria'. Furthermore we find in Schelling's theory of the Absolute as the 'utterly One' a union of Plotinus' notion of a pure One beyond Being with that of the reflexive self-presence of nous, so that this Absolute can be understood as an All-Unity which grounds and embraces all actuality – because it is in itself the most unifying self-affirmation or self-mediation. What follows is a reflection on the anagogical function of art, especially from the viewpoint of Plotinus' non-Platonic rehabilitation of art as an imitation of nature. The last perspectives focus on Schelling's concept of matter and emanation – as different from and at the same time coherent with that of Plotinus – and on Schelling's theory of an absolute self – willing will in connection with Plotinus' Enneads VI.8, 'On free will and the will of the One' as a causa sui.     

Measuring the speed of recognising facially expressed emotions

Faces provide identity- and emotion-related information—basic cues for mastering social interactions. Traditional models of face recognition suggest that following a very first initial stage the processing streams for facial identity and expression depart. In the present study we extended our previous multivariate investigations of face identity processing abilities to the speed of recognising facially expressed emotions. Analyses are based on a sample of N=151 young adults. First, we established a measurement model with a higher order factor for the speed of recognising facially expressed emotions (SRE). This model has acceptable fit without specifying emotion-specific relations between indicators. Next, we assessed whether SRE can be reliably distinguished from the speed of recognising facial identity (SRI) and found latent factors for SRE and SRI to be perfectly correlated. In contrast, SRE and SRI were both only moderately related to a latent factor for the speed of recognising non-face stimuli (SRNF). We conclude that the processing of facial stimuli—and not the processing of facially expressed basic emotions—is the critical component of SRE. These findings are at variance with suggestions of separate routes for processing facial identity and emotional facial expressions and suggest much more communality between these streams as far as the aspect of processing speed is concerned.     

The psychosocial well-being of a “forgotten” South African community: the case of Ndumo,KwaZulu-Natal

This study investigated the psychosocial well-being of an indigenous cultural community in South Africa, using a sequential explanatory mixed-methods design. Data on life satisfaction and emotional, social and psychological well-being were collected from 521 local residents (48% female) of Ndumo in KwaZulu-Natal, South Africa using the Satisfaction-with-Life Scale and Mental Health Continuum. In addition, interviews were conducted with 20 Ndumo residents (35% female). Findings revealed that community members had above-average levels of psychosocial well-being and exhibited significant resilience towards countering socio-economic under-resourcing, including poverty and unemployment. The community resources found to aid resilient living included being able to live off the land, a pleasant climate, personal safety, hope for a better future, and instrumental, material, and social support from philanthropic organisations.     

Web-based training improves on-field offside decision-making performance

ObjectiveThe present study examined to what extent off-field offside decision-making training transfers to real-life offside situations.Design/methodsEighteen Belgian assistant referees were included in the experiment. Ten assistant referees (i.e., training group) were exposed to a pre- and posttest and, in between, four off-field offside training sessions via a web-based training protocol. The remaining eight assistant referees participated in the control group and only completed the pre- and posttest. During both test sessions, which were conducted separately for each group, both an on- and off-field offside decision-making test was completed.ResultsFirst, an increase in response accuracy and a decrease in flag errors were observed for the training group from pre- to posttest in both the on- and off-field offside test. Second, only the training group improved in the recall and recognition accuracy of the position of the receiving attacker at the moment of the pass.ConclusionsThis study demonstrates that perceptual-cognitive skill training results in a positive and direct transfer to on-field offside decisions. Therefore, the structure and the content of the current training intervention mimics the perceptual difficulties of real-match situations and can help the assistant referees to mediate and enhance their offside decision-making skills, both on- and off-field.     

Structural Equation Modeling of Spatial Presence: The Influence of Cognitive Processes and Traits

This article examines the formation process of spatial presence, which is conceived as a two-step process involving the construction of a mental model of the mediated environment, followed by the emergence of spatial presence. During both stages, cognitive processes and user traits are in effect. We present data derived from a pooled set of data of three studies using the same virtual environment. Structural equation modeling is used to confirm the proposed theoretical model. The results show that attention and the trait of visual spatial imagery are positive predictors of the mental model of the mediated environment. In the second step, the formation of spatial presence is governed by involvement, the suspension of disbelief, and the domain-specific interest, together with the mental model.