Logical structuralism and Benacerraf’s problem

There are two general questions which many views in the philosophy of mathematics can be seen as addressing: what are mathematical objects, and how do we have knowledge of them? Naturally, the answers given to these questions are linked, since whatever account we give of how we have knowledge of mathematical objects surely has to take into account what sorts of things we claim they are; conversely, whatever account we give of the nature of mathematical objects must be accompanied by a corresponding account of how it is that we acquire knowledge of those objects. The connection between these problems results in what is often called “Benacerraf’s Problem”, which is a dilemma that many philosophical views about mathematical objects face. It will be my goal here to present a view, attributed to Richard Dedekind, which approaches the initial questions in a different way than many other philosophical views do, and in doing so, avoids the dilemma given by Benacerraf’s problem.     

Attention to faces modulates early face processing during low but not high face discriminability

In the present study, we investigated whether attention to faces results in sensory gain modulation. Participants were cued to attend either to faces or to scenes in superimposed face—scene images for which face discriminability was manipulated parametrically. The face-sensitive N170 event-related potential component was used as a measure of early face processing. Attention to faces modulated N170 amplitude, but only when faces were not highly discriminable. Additionally, directing attention to faces modulated later processing (~230—300 msec) for all discriminability levels. These results demonstrate that attention to faces can modulate perceptual processing of faces at multiple stages of processing, including early sensory levels. Critically, the early attentional benefit is present only when the “face signal” (i.e., the perceptual quality of the face) in the environment is suboptimal.     

Dynamic epistemic logic with branching temporal structures

van Bentham et al. (Merging frameworks for interaction: DEL and ETL, 2007) provides a framework for generating the models of Epistemic Temporal Logic (ETL: Fagin et al., Reasoning about knowledge, 1995; Parikh and Ramanujam, Journal of Logic, Language, and Information, 2003) from the models of Dynamic Epistemic Logic (DEL: Baltag et al., in: Gilboa (ed.) Tark 1998, 1998; Gerbrandy, Bisimulations on Planet Kripke, 1999). We consider the logic TDEL on the merged semantic framework, and its extension with the labeled past-operator “P _ϵ” (“The event ϵ has happened before which. . .”). To axiomatize the extension, we introduce a method for transforming a given model into a normal form in a suitable sense. These logics suggest further applications of DEL in the theory of agency, the theory of learning, etc.     

Lay family support during pregnancy and infancy: The child survival/fair start initiative

This paper discusses the Ford Foundation's Child Survival/Fair Start Initiative, under which Ford has sponsored community-based strategies to improve pregnancy outcomes and infant health and development, through parent support, education, and service brokerage. We present an overview of the general Child Survival/Fair Start strategy and then examine in detail emerging lessons in two areas: The influence of specific patterns of family support needs on local program priorities and emphases and the nurturance and work of the lay home visitors.     

Five Years, Twelve Steps, and REBT in the Treatment of Dual Diagnosis

A five-year NIDA-funded grant is described that compared client-centered 12-step-oriented and REBT/SMART Recovery-oriented intensive outpatient treatment/partial hospitalization programs with severely impaired clients with dual diagnosis (serious mental illness/substance abuse). Results are presented and suggestions made for applying the findings.     

Effects of paraprofessional training on one aspect of generalized interpersonal effectiveness

American Journal of Community Psychology -     

Social influence and perceived organizational support: A social networks analysis

We suggest that employees’ perceptions of organizational support (POS) are not solely a product of independent evaluations of treatment offered by the organization, but are also shaped by the social context. We argue that coworkers will directly (through inquiry via cohesive friendship and advice ties) and indirectly (through monitoring of employees structurally equivalent in advice and friendship networks) affect employees’ perceived organizational support. Network studies in the admissions department of a large public university and a private company specializing in food and animal safety products indicate that employees’ POS are similar to those of coworkers with whom they maintain advice relationships as well as to those who hold structurally equivalent positions in organizational friendship and advice networks. Our work contributes to organizational support theory by developing and testing a theoretical explanation for the relationship between the social context and perceptions of support among employees. Implications for research and practice are offered.