Yes,no, maybe so: a veritistic approach to echo chambers using a trichotomous belief model

I approach the study of echo chambers from the perspective of veritistic social epistemology. A trichotomous belief model is developed featuring a mechanism by which agents will have a tendency to form agreement in the community. The model is implemented as an agent-based model in NetLogo and then used to investigate a social practice called Impartiality, which is a plausible means for resisting or dismantling echo chambers. The implementation exposes additional factors that need close consideration in an evaluation of Impartiality. In particular, resisting or dismantling echo chambers requires the selection of sufficiently low levels of doxastic entrenchment, but this comes with other tradeoffs.     

Cooperativity and Selectivity in Conversation

Conversing with others is a mundane, daily activity of nearly all humans, yet it is an extraordinary feat of social collaboration that depends on cooperation, social learning, and collective coordination across an array of caring relationships. This article briefly considers the cooperative and selective nature of language and something of its contributions to the structural, social, and developmental character of human action and cognition. In doing so, it introduces 3 other articles that form a special section of this issue that is a continuation of an earlier special issue (Fowler & Hodges, 2015). The evidence reviewed here points to the possibility that the integrated, synergistic, cooperative character of language may prove to be a particular strength of ecological approaches to cognition and action rather than a liability.     

Meta-analysis of the association between rumination and reduced autobiographical memory specificity

The CaRFAX model, proposed by Williams J. M. G. (2006. Capture and rumination, functional avoidance, and executive control (CaRFAX): Three processes that underlie overgeneral memory. Cognition and Emotion, 20, 548–568. doi:10.1080/02699930500450465; Williams, J. M. G., Barnhofer, T., Crane, C., Herman, D., Raes, F., Watkins, E., &; Dalgleish, T. (2007). Autobiographical memory specificity and emotional disorder. Psychological Bulletin, 133(1), 122–148. doi:10.1037/0033-2909.133.1.122) posits that reduced autobiographical memory specificity, a key factor associated with the emergence and maintenance of emotional disorders, may result from heightened rumination. We provide the first meta-analysis of the relation between autobiographical memory specificity and trait rumination. PsycINFO, PsycARTICLES and MEDLINE databases were searched and the following were extracted: the correlation between the number of specific memories recalled in the Autobiographical Memory Test and self-reported trait rumination scores, and its sub-factors – brooding and reflection. The pooled effect size for the correlation between memory specificity and trait rumination was small (d?=??.05) and did not differ significantly from zero (p?=?.09). The effect sizes for the correlation with brooding and reflection were not significantly different from zero. There is limited support for the association between trait rumination and memory specificity suggested in CaRFAX.     

The amplification of reason,or the recuperation of imagination: Peter Weir's Dead Poets Society

Abstract

The principal aim of this article is to focus on the problem of the applicability of Rawls’s ideas to the growing interest in developing what might now well be called a “global bioethics”. The specific focus is the question whether Rawls’s later work helps us to develop principles of distributive justice for such an alleged global bioethics, drawing on and critically evaluating Alan Buchanan’s critical discussion of Rawls’s The Law of Peoples. The main tenets of Rawls’s theory of justice, particularly as it concerns health care as one of our “primary needs”, are discussed, drawing on the work of Norman Daniels. Secondly, an argument for the necessity of a global approach to biomedical ethics in view of the need for a more equitable provision of health care between developed and developing worlds is developed. Thirdly, the main tenets of Rawls’s The Law of Peoples, the book in which Rawls extrapolated the implications of his theory of justice to the sphere of just international law, are discussed. Allen Buchanan’s criticisms of this Rawlsian enterprise are critically reviewed. On the basis of this discussion, two additional Principles of Global Distributive Justice (PGDJ) are formulated. The first principle is: “Justice in international relations requires that the burden of catastrophic events be distributed equitably between affected and unaffected peoples”. The implications of this principle are discussed, and complemented with an extended definition of the concept of “catastrophe”. Drawing on each component of that definition, the author then illustrates how the HIV/AIDS pandemic is the best current example of an international catastrophe, and how that calls for the implementation of the formulated principle. Then follows the formulation of the second principle for distributive justice for the law of peoples. This principle is: “Justice requires that efforts at an equitable distribution of burdens at the level of international relations be met with policies from the beneficiaries that, as far as possible, sustain the benefits attained from these efforts”. The author ends by showing how this principle is being neglected by the denialism of, for example, the South African policy-makers’ lack of a responsible response to the HIV/AIDS pandemic over the past decade, and by making suggestions how this denial and neglect might be rectified in the area of the provision of antiretroviral drugs to prevent mother-to-child transmission of HIV.     

Generating nonsymbolic number stimuli

Studies investigating nonsymbolic numbers (e.g., dot arrays) are confronted with the problem that changes in numerosity are always accompanied by changes in the visual properties of the stimulus. It is therefore debated whether the visual properties of the stimulus rather than number can explain the results obtained in studies investigating nonsymbolic number processing. In this report, we present a program (available at ; note that the program is designed to work with the Psychophysics Toolbox in MATLAB) that exports information about the visual properties of stimuli that co-vary with number (area extended, item size, total surface, density, and circumference). Consequently, insight into the relation between the visual properties of the stimulus and numerical distance can be achieved, and post hoc analyses can be conducted to directly reveal whether numerical distance or (some combinations of) the visual properties of a stimulus could be the most likely candidate underlying the results. Here, we report data that demonstrate the program’s usefulness for research on nonsymbolic number stimuli.     

Discussion

Studies in Philosophy and Education -     

Identity Processes in Collective Action Participation: Farmers' Identity and Farmers' Protest in the Netherlands and Spain

This study tested the assumption that a sense of collective identity stimulates participation in collective action. Contextual circumstances supposedly make a collective identity more salient and compel people to act as members of the group; protest participation is more likely among people with a strong collective identity. Group identification and participation in identity organizations were used as indicators of collective identity in a study of 248 farmers from Galicia (Spain) and 167 farmers from the Netherlands. The farmers were interviewed three times at intervals of 1 year. The longitudinal design also allowed a test of causality. A sense of collective identity appeared to stimulate preparedness to take part in farmers' protest. Action preparedness leads to action participation, which in turn appears to foster collective identity.     

Atypical neuropsychological profile in a boy with 22q11.2 Deletion Syndrome.

In this article the general and specific cognitive impairments of the boy R.H. with a de novo deletion 22q11.2 are described. His full-scale IQ was 73, and he obtained only slightly better verbal than non-verbal subtest scores. Neuropsychological assessment revealed specific impairments in perceptual categorization of objects presented suboptimal, matching of unfamiliar faces, and verbal learning and memory. In contrast, he performed in accordance with his intelligence level on other visual perceptual tasks, on non-verbal learning and memory tasks, and on attention tasks. Voxel-wise statistical comparison of a high-resolution T1-weighted magnetic resonance image of R.H's brain with similar images obtained from 14 normal control children revealed as major abnormalities a reduction of the right inferior parietal and superior occipital lobe, and a bilateral reduction of deep white matter behind the inferior frontal gyrus. These cognitive impairments and MRI abnormalities are not commonly described in 22q11.2 Deletion Syndrome and may indicate a larger heterogeneity in the neurocognitive phenotype than currently evidenced. At least in this boy the microdeletion seems to have interfered with the development and functioning of particular neural subsystems, while the structure and functioning of other subsystems was left intact.