The effects of frequency of social interaction and relationship closeness on reward allocation

In this study of how the frequency of interaction affects decisions on reward allocation, 320 Chinese adults were randomly assigned to 8 conditions and instructed to read a scenario describing 2 co-workers completing a task and obtaining a bonus. The 8 conditions differed in the type of relationships, the frequency of past interaction between co-workers, and the possibility of future interaction. Each participant was instructed to act as the allocator and to hypothetically allocate a monetary reward to the co-worker. The results indicated that both past interaction and future interaction between the co-workers significantly influenced the allocation decision. These results also suggested that the frequency of 2 individuals' past interaction can be predictive of the closeness of their relationship.     

Assimilation and ethnic boundaries: Israeli students' altitudes toward soviet immigrants

The attitudes of Israeli students toward new immigrants from the former Soviet Union were examined against the theoretical framework of the sociology of ethnicity and sociology of education. The main research question explored was which ethnic relationship model (assimilation, pluralism, or separation) best described the attitudes and self-reported behavior of Israeli youth toward the new immigrants. Israeli students' changing attitudes toward their immigrant counterparts were also investigated, as well as actual Israeli educational practices (not only declared policies) regarding Soviet immigrants. The study was conducted in grades 4-11 at schools in northern Israel. The results indicated positive attitudes and openness of relations by the Israelis toward the new immigrant students in the first year following their immigration. However, the attitudes were less positive in the second year. Although the Israeli students manifested positive attitudes toward immigration and to the immigrants themselves, these views were largely assimilatory; Israeli cultural capital was obviously dominant, and it was expected to be accepted as such by the newcomers. The findings point to Israeli assimilatory educational practice; immigrants are expected to blend in, abandoning their past heritage and culture.     

Scientists in the Swamp: Narrowing the Language–Practice Gap in Community Psychology

As a confluence of unique values and activities, the collective practice of community psychology is difficult to characterize in a simple way. Increasingly, however, professional contexts are laden with pressure to define any practice—from library work to medical interventions—in the orderly, compact language of traditional science. This trend has historically been resisted in the field by those sensing a fundamental lack of fit between the fluid, emergent aspects of community psychological practice and the fixed, precise language of classic science. In response to this “language–practice gap,” some have attempted to adapt the traditional language of science to better fit the field's practice, while others have explored alternative languages of practice seemingly more indigenous to the messy “swamp” of actual communities. While the former effort leaves some theoretical contradictions intact, the latter tends to discount scientific identity entirely. This paper proposes a potential step forward by resituating questions of disciplinary language and identity within a current philosophical discourse where the nature of social science itself remains sharply contested. This suggests shifting attention away from “should we be a science?” to “what kind of science might we be after all?”; in turn, alternative languages may be re‐cast as legitimate contributors to a kind of science more authentic to human communities—even a viable “science in the swamp.” One such language–philosophical hermeneutics—is presented as a particularly valuable supplement to traditional science. Illustrations highlight ways that hermeneutics may advance the formal language of the field towards a closer fit of what actually happens in practice, while preserving and even bolstering the empirical rigor and scientific identity of the field.     

Quality of Relationships Between Youth and Community Service Providers: Reliability and Validity of the Trusting Relationship Questionnaire

We examined the factor structure and psychometric properties of the Trusting Relationship Questionnaire, a brief measure of relationship quality between youth and community-based service providers involved in their care. Data on youth residing in Therapeutic Foster Care and in Group Homes (N = 296) were collected. We identified a one-factor solution for the child version of the measure and a two-factor structure for the adult version: child's perception of the relationship and adult's perception of the relationship. Both versions appear to be highly reliable and possess adequate levels of construct, criterion, and discriminative validity. While no statistically significant age differences were noted on the parent version, on the child version, older youth were more likely to report lower relationship scores. Gender differences were found on both versions: Female youth reported higher scores on the child version as did adults reporters of relationships with female youth, but only for the first factor—child's perception of the relationship. Overall, the TRQ appears to capture the quality of the relationship between service providers and youth in their care, thus bridging a gap in assessment measures.     

Training-induced and electrically induced potentiation in the neocortex

Long-term potentiation (LTP) shares many properties with memory and is currently the most popular laboratory model of memory. Although it has not been proven that memory is based on an LTP-like mechanism, there is evidence that learning a motor skill can induce LTP-like effects. This evidence was obtained in a slice-preparation experiment, which precluded within-animal comparisons before and after training. In the present experiments, Long-Evans rats were unilaterally trained to acquire a forelimb reaching and grasping skill. Evoked potentials were found to be larger in motor cortex layer II/III in the trained, compared to the untrained, hemisphere in slice, acute, and chronic preparations. Consistent with previous research, the trained hemisphere was less amenable to subsequent LTP induction. Furthermore, the application of either LTP- or LTD-inducing stimulation during the training phase of the reaching task disrupted the acquisition of the skill, providing further evidence that memory may be based on an LTP mechanism.     

A model of bidirectional synaptic plasticity: from signaling network to channel conductance

In many regions of the brain, including the mammalian cortex, the strength of synaptic transmission can be bidirectionally regulated by cortical activity (synaptic plasticity). One line of evidence indicates that long-term synaptic potentiation (LTP) and long-term synaptic depression (LTD), correlate with the phosphorylation/dephosphorylation of sites on the alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor subunit protein GluR1. Bidirectional synaptic plasticity can be induced by different frequencies of presynaptic stimulation, but there is considerable evidence indicating that the key variable is calcium influx through postsynaptic N-methyl-d-aspartate (NMDA) receptors. Here, we present a biophysical model of bidirectional synaptic plasticity based on [Ca2+]-dependent phospho/dephosphorylation of the GluR1 subunit of the AMPA receptor. The primary assumption of the model, for which there is wide experimental support, is that the postsynaptic calcium concentration, and consequent activation of calcium-dependent protein kinases and phosphatases, is the trigger for phosphorylation/dephosphorylation at GluR1 and consequent induction of LTP/LTD. We explore several different mathematical approaches, all of them based on mass-action assumptions. First, we use a first order approach, in which transition rates are functions of an activator, in this case calcium. Second, we adopt the Michaelis-Menten approach with different assumptions about the signal transduction cascades, ranging from abstract to more detailed and biologically plausible models. Despite the different assumptions made in each model, in each case, LTD is induced by a moderate increase in postsynaptic calcium and LTP is induced by high Ca2+ concentration.     

A Window Into Richard M. Zaner’s Clinical Ethics

This essay introduces a thematic issue focused on the contributions to clinical ethics and the philosophy of medicine by Richard M. Zaner. We consider the apparent divorce of Zaners philosophical roots from his recent narrative immersions into the blooming, buzzing confusions of clinical-moral lifeworlds. Our considerations of the Zanerian context and origins of the clinical encounter introduce the fundamental questions faced by Zaner and his commentators in this issue, questions about the role of ethics consultants, moral authority, and clinical truths.     

A comparison of auditory and visual apparent motion presented individually and with crossmodal moving distractors

Unimodal auditory and visual apparent motion (AM) and bimodal audiovisual AM were investigated to determine the effects of crossmodal integration on motion perception and direction-of-motion discrimination in each modality. To determine the optimal stimulus onset asynchrony (SOA) ranges for motion perception and direction discrimination, we initially measured unimodal visual and auditory AMs using one of four durations (50, 100, 200, or 400 ms) and ten SOAs (40-450 ms). In the bimodal conditions, auditory and visual AM were measured in the presence of temporally synchronous, spatially displaced distractors that were either congruent (moving in the same direction) or conflicting (moving in the opposite direction) with respect to target motion. Participants reported whether continuous motion was perceived and its direction. With unimodal auditory and visual AM, motion perception was affected differently by stimulus duration and SOA in the two modalities, while the opposite was observed for direction of motion. In the bimodal audiovisual AM condition, discriminating the direction of motion was affected only in the case of an auditory target. The perceived direction of auditory but not visual AM was reduced to chance levels when the crossmodal distractor direction was conflicting. Conversely, motion perception was unaffected by the distractor direction and, in some cases, the mere presence of a distractor facilitated movement perception.