The relation of lightness and stereoscopic depth in a simple viewing situation

The effect of stereoscopic depth on perceived lightness was studied using a simple, achromatic stimulus arrangement. In Experiment 1, depth/lightness interactions were sought between a single test field and a single induction field. In Experiment 2, depth/lightness interactions were looked for between a single test field and two induction fields. Stimuli were presented on a computer screen and viewed with a stereoscope. The subjects reported perceived lightness of the achromatic test field by rating its apparent blackness along a dimension of 0%–100%. In Experiment 1, they reported lightness judgments of the test field across 13 perceived depth levels and 8 contrast levels. In Experiment 2, they gave lightness judgments of the test field across 7 perceived depth levels and 16 contrast levels. We were particularly interested in observing the generality of Gilchrist’s coplanar ratio hypothesis. The results showed that when stereopsis and contrast levels are the available cues, depth and lightness percepts are independent, and it is retinal ratios, not coplanar ratios, that dictate lightness perception. We conclude that before the relative depth location of an object is determined, its lightness value is known through sensory-level processes.     

Daniel Howard-Snyder (ed.), The Evidential Argument from Evil

International Journal for Philosophy of Religion -     

Seeking Social Support in Old Age as Reasoned Action: Structural and Volitional Determinants in a Middle-Aged Sample of Argentinean Women1

Given that the availability of social support influences physical and psychological well-being, the provision of positive contacts is often crucial for older women. The purpose of the present study was to test the utility of both structural and volitional factors as determinants of support-seeking intentions. Two intentions to seek social support were studied in a group of 106 middle-aged women: (a) the intention to go to a doctor at least once a year after 55; and (b) the intention to visit a family member at least once a week after 55. The structural variables of interest were age, educational level, presence of partner, number of children, and number of grandchildren. The volitional factors assessed were intentions, beliefs, attitudes, and norms. There was little evidence that structural factors influenced support seeking. In contrast, as predicted from the theory of reasoned action (Ajzen & Fishbein, 1980; Fishbein & Ajzen. 1975), intentions to go to the doctor and to visit a family member could be successfully predicted from attitudes and norms.     

Achievements of the hermeneutic-phenomenological approach to natural science A comparison with constructivist sociology

The hermeneutic-phenomenological approach to the natural sciences has a special interest in the interpretive phases of these sciences and in the circumstances, cognitive and social, that lead to divergent as well as convergent interpretations. It tries to ascertain the role of the hermeneutic circle in research; and to this end it has developed, over the past three decades or so, a number of adaptations of hermeneutic and phenomenological concepts to processes of experimentation and theory-making. The purpose of the present essay is to show how appropriate these concepts are to an important current research program (solar neutrinos) and thus to point out what difference they make to our understanding of science as a whole. This goal is pursued by means of comparison. The program of social constructivism in natural science has produced alternative but parallel concepts, embodied in an alternative and parallel vocabulary. The contrast between this vocabulary and that of hermeneutics and phenomenology reveals, so I argue, the advantages of the latter. But actually it does more: It reveals as well the pre-understanding or prejudgment of science embedded in each approach.     

A computational account of deep dysphasia: evidence from a single case study.

We present a case study of a patient, NC, who demonstrates the defining characteristics of deep dysphasia including semantic errors in repetition and an inability to repeat nonwords. In addition, NC's single word repetition and lexical decision performances are influenced by the imageability of the word input. NC also demonstrates a severely restricted phonological short-term memory (one digit, one word). Although his phonological discrimination is good in a minimal pairs judgment task, it becomes impaired when a delay is imposed or rehearsal is prevented between presentation of each member of a pair. NC's output is fluent but contains many formal paraphasias and neologisms. NC's total language profile is evaluated within the framework of Dell's (1986) interactive spreading activation model of language production. Adapting this output model to input processes, we account for all of NC's deep dysphasic symptoms as well as his pattern of production in a way that is more parsimonious than other attempts to model this disorder. In particular, we suggest that the semantic and formal paraphasias in naming and repetition result from a pathological increase in the rate of decay of primed nodes in the semantic-lexical-phonological network. This rapid decay increases the probability that phonologically and/or semantically related lexical nodes primed by top-down and bottom-up feedback during the operation of lexical activation and retrieval will be activated and selected instead of the lexical target. The advantages of using this model to account for aphasic symptoms and the implications for other lexical theories are discussed.     

Race bias in diagnosis and treatment of juvenile offenders: Findings and suggestions

There is evidence that Black juvenile delinquents have received biased differential treatment in mental health care systems. Research shows that the White juvenile offender often is assessed as having a psychological problem while the Black juvenile offender is more often seen as exhibiting behavior characteristic of his culture and more often than not receives inadequate psychological counseling. This article integrates information on juvenile delinquency, interracial diagnosis, and cross-cultural understanding. It is hoped the information will aid the forensic psychological professional to better understand culturally different children and youth as well as examine his or her own cache of cultural baggage which may interfere with the appropriate assessment and treatment of Black juvenile offenders.     

Eysenck's incubation of fear hypothesis: an experimental test

The present experiment was designed to test Eysenck's hypothesis that repeated exposure to an unreinforced CS of brief duration following acquisition of a classical aversive CR may lead to a progressive increase in the strength of that CR, provided that the UCS is intense and the CR has drive-like properties. Using a between-groups design, normal human subjects were given identical classical acquisition trials, followed by extinction trials where CS duration was either 2, 8 or 16 sec. The UCS was of fixed high intensity. Dependent measures were tonic and phasic heart rate and skin conductance. No evidence of incubation was found as a function of CS duration. Nor was there any indication that CS duration differentially affected resistance to extinction. A small number of subjects showed evidence of incubation with heart rate measures during extinction. However, there was no indication that this enhancement was governed by the parameters suggested by Eysenck. UCR amplitude, which showed a positive correspondence with CS-bound activity throughout the trials, did not reliably predict incubation. Problems concerning both the definition and the demonstration of incubation are discussed.     

Empathy and justice motivation

Empathic distress is defined as an aversive feeling contingent on another's physical, emotional, or economic distress. The paper (1) summarizes a developmental scheme consisting of four stages of empathic distress; (2) suggests that causal attributions may partly transform empathic distress into sympathy, empathic anger, feeling of injustice, and guilt feeling; (3) notes the evidence that these empathic affects often serve to motivate moral behavior, and therefore that they qualify as moral motives; (4) points up limitations of these affects/motives and the need to embed them in justice principles; (5) discusses links between empathic affects/motives and principles of distributive justice/ (6) argues that Rawls' theory of justice, which excludes empathy, may nevertheless require it for the difference principle to influence behavior in real life; (7) hypothesizes a functional equivalence between empathy and the veil of ignorance; and (8) speculates that the conjunction of empathic affect and justice-principle thinking — in life and in abstract didactic contexts like Rawls' original position — may produce a principle having the motivational and stabilizing properties of a hot cognition.