KNOWLEDGE, SPEAKER AND SUBJECT

I contrast two solutions to the lottery paradox concerning knowledge: contextualism and subject-sensitive invariantism. I defend contextualism against an objection that it cannot explain how 'knows' and its cognates function inside propositional attitude reports. I then argue that subject-sensitive invariantism fails to provide a satisfactory resolution of the paradox.     

On the Gendered Nature of Mobile Phone Culture in Israel

Data from surveys and personal interviews were used to analyze gendered patterns and contexts of the mobile phone use of Israelis. The findings suggest that the mobile phone has become an everyday, highly regarded, multipurpose interpersonal communication device rather than a working tool. Both men and women discussed their perceptions of the role of the mobile phone in their lives in quite a traditional gendered manner—activity and technological appropriation for men and dependency and domesticity for women. At the same time, the actual phoning habits and attitudes of users point to a pattern of domestication of the mobile phone and even feminization of its consumption.     

Measuring Competence and Dysfunction in Preschool Children: Source Agreement and Component Structure

Agreement between parents and teachers on ratings of three domains of behaviors exhibited by preschool children and the structural relations between these domains were measured. Parents and teachers rated the behaviors of a socioeconomically diverse sample of 610 children; ratings were obtained from parents at three time points and from teachers at two time points. The results indicated little agreement between sources on the ratings of individual child behaviors; however, ratings within a source were stable over time. Principal components analyses of source ratings combined and separately indicated virtually identical and independent three-component solutions comprised of a coping competence, externalizing behavior, and internalizing behavior component. These data suggest that competence and dysfunction develop in response to different contextual demands and underscore the importance of measuring each domain of behavior in clinical and research settings.     

Post-training intrahippocampal inhibition of class I histone deacetylases enhances long-term object-location memory

Long-term memory formation involves covalent modification of the histone proteins that package DNA. Reducing histone acetylation by mutating histone acetyltransferases impairs long-term memory, and enhancing histone acetylation by inhibiting histone deacetylases (HDACs) improves long-term memory. Previous studies using HDAC inhibitors to enhance long-term memory have focused on the fear-conditioning task using broad-spectrum HDAC inhibitors. We have found that post-training intrahippocampal administration of the broad-spectrum HDAC inhibitor trichostatin A (TSA) or the class I HDAC-selective inhibitor MS275 enhances long-term object-location memory, supporting a role for class I HDACs in the enhancement of hippocampus-dependent memory induced by HDAC inhibition.     

Religiosity and social welfare: competing influences of cultural conservatism and prosocial value orientation

This research examines the hypothesis that religiosity has two competing psychological influences on the social welfare attitudes of contemporary Americans. On the one hand, religiosity promotes a culturally based conservative identity, which in turn promotes opposition to federal social welfare provision. On the other hand, religiosity promotes a prosocial value orientation, which in turn promotes support of federal social welfare provision. Across two national samples (Ns = 1,513 and 320) and one sample of business employees (N = 710), reliable support for this competing pathways model was obtained. We argue that research testing influences of nonpolitical individual differences on political preferences should consider the possibility of competing influences that are rooted in a combination of personality processes and contextual-discursive surroundings.     

Trajectories of religious coping from adolescence into early adulthood: their form and relations to externalizing problems and prosocial behavior

Little is known about changes in religious coping and their relations to adolescents' and young adults' functioning. In 686 Italian youths, trajectories of religious coping were identified from age 16-17 years to age 22-23 years; cohorts of youths reported at 3 of the 4 assessments. Four trajectories of religious coping were identified: decreasing, low stable, high stable, and increasing. A decline in religious coping was associated with high levels of externalizing problems at age 16-17, whereas an increase in religious coping was associated with higher externalizing problems at ages 18-19 and 20-21 years and with relatively high involvement with deviant peers. High stable religious copers were high in prosocial behavior at three ages; low stable religious copers were higher than people undergoing change in their religious coping from mid-adolescence into early adulthood. These results can expand our current thinking about religious coping and adolescent adjustment.     

Understanding constricted affect in schizotypy through computerized prosodic analysis

Constricted affect (CA) is a cardinal negative symptom of schizophrenia-spectrum disorders. It is unclear whether behaviorally-defined CA occurs in individuals with schizotypy-those with the personality organization reflective of schizophrenia liability. Moreover, it is unclear whether CA contributes to real world dysfunction in this population. The present study employed computerized prosodic analysis of natural speech procured during a laboratory procedure. Subjects were 89 individuals with psychometrically-defined schizotypy and 26 controls. Groups did not differ in any of the prosody measures examined here. Within the schizotypy group, increased prosodic expression was associated with positive schizotypy traits while decreased prosodic expression was associated with negative schizotypy traits. Prosodic deficits were significantly associated with reduced prosocial behaviors (e.g., talking with friends) but were not associated with subjective social satisfaction. Prosodic deficits characterize a subset of individuals with schizotypy who show a schizoid-like reduction in social behaviors without a concomitant reduction in social satisfaction.     

Involuntary strategy-dependent dual task performance

Previous studies showed that some dual tasks can be performed simultaneously without costs. Yet, a variable SOA between the inputs to such tasks leads to strategic, often involuntary, prioritization of one of the two tasks. Here we explore the boundary conditions for this involuntary or exogenous strategy. In Experiment 1, subjects were initially trained on dual task performance where the input to the two tasks is presented simultaneously (0 SOA). We used two tasks that under such conditions can be performed without costs and indeed subjects displayed perfect sharing of the tasks. Subjects then performed the same two tasks but with a variable SOA (0, 50, 150, 800?ms). This manipulation led to a serial-like performance of the two tasks even in trials with 0 SOA. In Experiment 2, subjects participated in eight sessions. Within each session, they performed in alternation blocks with a fixed 0 SOA and blocks with a variable SOA. Subjects displayed perfect sharing in the pure 0 SOA blocks but performed the two tasks serially in the mixed SOA blocks despite receiving identical instructions. These findings demonstrate that task context is a powerful factor in dual task performance and may lead subjects to involuntarily exhibit dual task costs even in conditions where they can perform the tasks without any costs. Moreover, these findings strongly suggest that costs observed in PRP studies reflect the use of such exogenous strategies rather than a general structural dual task limitation.     

Developmental course of impulsivity and capability from age 10 to age 25 as related to trajectory of suicide attempt in a community cohort

Hierarchical linear models were used to examine trajectories of impulsivity and capability between ages 10 and 25 in relation to suicide attempt in 770 youths followed longitudinally: intercepts were set at age 17. The impulsivity measure assessed features of urgency (e.g., poor control, quick provocation, and disregard for external constraints); the capability measure assessed aspects of self-esteem and mastery. Compared to nonattempters, attempters reported significantly higher impulsivity levels with less age-related decline, and significantly lower capability levels with less age-related increase. Independent of other risks, suicide attempt was related significantly to higher impulsivity between ages 10 and 25, especially during the younger years, and lower capability. Implications of those findings for further suicidal behavior and preventive/intervention efforts are discussed.