Information along contours and object boundaries

F. Attneave (1954) famously suggested that information along visual contours is concentrated in regions of high magnitude of curvature, rather than being distributed uniformly along the contour. Here the authors give a formal derivation of this claim, yielding an exact expression for information, in C. Shannon's (1948) sense, as a function of contour curvature. Moreover, they extend Attneave's claim to incorporate the role of sign of curvature, not just magnitude of curvature. In particular, the authors show that for closed contours, such as object boundaries, segments of negative curvature (i.e., concave segments) literally carry greater information than do corresponding regions of positive curvature (i.e., convex segments). The psychological validity of this informational analysis is supported by a host of empirical findings demonstrating the asymmetric way in which the visual system treats regions of positive and negative curvature.     

Visual identification and spatial location in Alzheimer's disease

Twelve patients with Alzheimer's disease (AD) and 15 healthy elderly control subjects were shown sets of luminance-defined letters, texture-defined letters, luminance-defined squares, and texture-defined squares. They were asked to name the letters or point to the target square on each page. The stimuli were graded into four levels of difficulty based on the amount of contrast between the figure and the background. Performance was measured in terms of the maximum level of difficulty at which the participant correctly identified or located the three figures. Contrary to expectations, no significant difference was found between the performance of AD patients and control subjects on texture discrimination tasks vs. luminance discrimination tasks. However, results indicate that AD patients are impaired in performing a task requiring them to locate a texture-defined target of known shape in a noisy background field. By contrast, AD patients show no significant deficit in a task requiring them to locate a texture-defined shape in a known location. This argues that the observed deficit in the location task is not due to a failure in the system that discriminates target texture from background texture (since both location and identification tasks require the same textural discriminations), but rather to an impairment of the system responsible for "finding things" (i.e., locating known targets at unknown locations). This observation suggests that AD patients may suffer selective damage to the dorsal "Where" pathway, which is responsible for localizing objects in space.     

Influences of Marital Conflict on Child Adjustment: Review of Theory and Research

This review summarizes the literature on the relationship between marital conflict and child maladjustment with an emphasis on variables that qualify, explain the association, or both. Following a historical review, the modest findings on the strength of the association between marital conflict and child maladjustment is explored. The definition of marital conflict is clarified through specification of its various dimensions (frequency, intensity, content, resolution). The role of variables that serve to moderate and/or mediate the relationship between marital conflict and child maladjustment are elaborated. Mediating models include exposure theories (Modeling, Cognitive–Contextual effects: appraisal of threat and blame, and Emotional Insecurity) and changes in the parent–child relationship (Spillover). Variables that moderate or qualify the relationship include children's cognitions and behaviors, contextual factors, and demographic differences. A model is presented summarizing these mechanisms. Research recommendations are proposed and the clinical implications of this literature are addressed.     

Egoism,Labour, and Possession: A reading of “Interiority and Economy,” Section II of Lévinas' Totality of Infinity

Lévinas is the philosopher of the absolutely Other, the thinker of the primacy of the ethical relation, the poet of the face. Against the formalism of Kantian subjectivity, the totality of the Hegelian system, the monism of Husserlian phenomenology and the instrumentalism of Heideggerian ontology, Lévinas develops a phenomenological account of the ethical relation grounded in the idea of infinity, an idea which is concretely produced in the experience with the absolutely other, particularly, in their face. The face of the other, irreducible to any ontological structure of being or any epistemological intentionality of representation, reaches out from on high across the abyss of the isolated ego, commanding respect all the while granting the possibility of murder. This experience overflows the subjective capacity of the separated ego, forcing it “beyond being.” This anarchic relation with the Other is the groundless condition of possibility for ethical life, that is, truly human life. The structure of the ethical relation can then be determined in hindsight as the ground of meaning for what it is to be an I at all.

This is a pretty uncontroversial reading of Lévinas' work, especially Totality and Infinity (TI). And yet, there is one small problem. If this is what Lévinas is doing, then why does the largest section of Totality and Infinity – section II, “Interiority and Economy” – have nothing to do with ethics, the other, or the face at all? Why is it devoted to an arduous analysis of what he calls separation, egoism, economy, enjoyment, labour, and possession? In other words, why does Lévinas spend so much energy on writing about the egoist at the heart of his magnum opus, which is supposedly a text devoted to the Other? And furthermore, why is this section one of the least discussed in the secondary literature on Lévinas?

These questions motivate the present inquiry, which modestly seeks to understand what Lévinas is up to in this section. Once laying out the basic story, I will focus on the concepts of labour and possession, for I think these are the unrecognized pivots upon which the transition from ego to Other turns. I will also make some slight attempts to interpret Lévinas' direct or indirect comments on Plato, Kant, Hegel, Husserl and Heidegger. For although he distances himself from these giants, he stands on their shoulders as well.     

Differentiation of Self, Stress, and Emotional Support as Predictors of Psychological Distress

We explored the relations among stress, emotional support, and differentiation of self from the family of origin as predictors of psychological distress in a sample of 200 college students. First, we investigated the discrepant findings of Murdock and Gore (Contemp Fam Ther 23: 319–335, 2004) and Skowron et al. (J Couns Dev 82: 69–78, 2004) regarding the relationships among stress, differentiation, and symptoms (a question of mediation vs. moderation). Second, we examined the role of emotional support in concert with stress and differentiation. When both stressful events and perceived stress were measured, differentiation of self was found to be a significant partial mediator of their effects on psychological distress. Emotional support was also found to partially mediate the relationship between differentiation of self and psychological distress. Differentiation of self partially mediated the relationship between actual and perceived stress, and perceived stress partially mediated the relationship between differentiation of self and psychological distress.     

The Personality Psychopathology-Five (PSY-5): recent constructive replication and assessment literature review

The Personality Psychopathology-Five (PSY-5; Harkness & McNulty, 1994) is a model of individual differences relevant to adaptive functioning in both clinical and non-clinical populations. In this article, we review the development of the PSY-5 model (Harkness, 1992; Harkness & McNulty, 1994) and discuss the ways in which the PSY-5 model is related to and distinct from other 5-factor models. Using different methods and measures, the dimensions of the PSY-5 model have been constructively replicated (Lykken, 1968) by Tackett, Silberschmidt, Krueger, and Sponheim (2008) and by Watson, Clark, and Chmielewski (2008), and dimensions congruent with the PSY-5 have even been suggested for the Diagnostic and Statistical Manual of Mental Disorders (5th ed.; Krueger et al., 2011). PSY-5 Scales can be scored from the Minnesota Multiphasic Personality Inventory-2 (MMPI-2; Butcher et al., 2001), the MMPI-Adolescent version (MMPI-A; Butcher et al., 1992), and the Restructured Form of the MMPI-2 (MMPI-2-RF; Ben-Porath & Tellegen, 2008). Because the largest body of research exists for the MMPI-2-based scales, we focus our review of the literature on the MMPI-2-based PSY-5 scales (Harkness, McNulty, & Ben-Porath, 1995), but we briefly cover the small, but growing, body of MMPI-A and MMPI-2-RF PSY-5 scales research. We show that the PSY-5 research literature includes a wide variety of psychometric methodologies as well as diverse samples and clinical problems. An integrative summary reprises the theory behind each PSY-5 construct and links it to the reviewed literature. Advantages and limitations of MMPI-2-based PSY-5 scales are discussed.