Kinetics of persistent photoconductivity in crystalline III–V semiconductors

Although persistent photocurrent (PPC) in photoconductive III–V semiconductors is known to be dominated by dispersive reaction kinetics, which produce a stretched exponential function decay, exp[?(t/τ)^β], where τ is the effective reaction time and β (<1.0) is the dispersion parameter, the reason for the occurrence of the PPC is still not clear. Here, we discuss the origin of dispersive kinetic relaxation associated with a DX-like centre, i.e. deep levels associated with donors in III–V semiconductors. It is suggested that lattice relaxation of DX-like centres, accompanied by multi-phonon processes, may play a role in the dispersive nature of the PPC.     

Multilevel analysis of individual differences in regularities of grapheme–color associations in synesthesia

Grapheme–color synesthesia is a neurological phenomenon where visual perception of letters and numbers stimulates perception of a specific color. Grapheme–color correspondences have been shown to be systematically associated with grapheme properties, including visual shape difference, ordinality, and frequency. However, the contributions of grapheme factors differ across individuals. In this study, we applied multilevel analysis to test whether individual differences in regularities of grapheme–color associations could be explained by individual styles of processing grapheme properties. These processing styles are reflected by the type of synesthetic experience. Specifically, we hypothesized that processing focusing on shape differences would be associated with projector synesthetes, while processing focusing on ordinality or familiarity would be associated with associator synesthetes. The analysis revealed that ordinality and familiarity factors were expressed more strongly among associators than among projectors. This finding suggests that grapheme–color associations are partly determined by the type of synesthetic experience.     

Rethinking the scientist-practitioner model: On the necessary complementarity of the natural and human science dimensions

Although the dominant scientist–practitioner model has considerable professional support, it remains the case that there is a fundamental mismatch between its conceptualisation of the practitioner as a laboratory scientist in a clinical setting and the actual requirements for good counselling practice. In particular, there is mismatch between the kind of knowledge generated in the laboratory setting and the epistemic requirements of the therapeutic situation; and between the (detached, impersonal) kind of decision-making engaged in by the laboratory scientist and the (interpersonal, interactive) kind engaged in by the practitioner. Moreover, being structural in character, these limitations cannot be rectified by piecemeal modifications of the standard model, such as those envisaged on the ‘local clinical scientist model’. Nor can the recent push towards ‘evidence-based practice’ suffice as a corrective because the core problem simply replicates itself on that level. Instead, since they derive from an unduly restrictive conception of what constitutes scientific inquiry, they require endorsement of the equal partnership of the human science template as a corrective. Moreover, far from compromising its scientific commitments, this actively facilitates rethinking the integration of science and practice in the service of the effective practice of care.     

Systematic Screening for Behavior in K–12 Settings as Regular School Practice: Practical Considerations and Recommendations

There is a priority for schools to address students' social and emotional needs as is done for academic learning. Tiered models of prevention provide a framework for teaching social skills and behavioral expectations, as well as academics, with positive, proactive, evidence-based practices. Central to responding to students' needs is accurate measurement of their performance. Systematic screening for behavior addresses this need. Specific screening tools are presented with brief evidence for their use. Then practical considerations and recommendations are offered for school leadership teams as they plan for using systematic behavior screening as a regular school practice. The study was framed within tiered models of prevention; however, screening practices may be used outside of tiered models provided structures are in place for responding to student needs when detected. Content is offered to guide school leadership teams as they undertake systematic behavior screening efforts.     

Between Dream Cities and Reality: Personal Narratives of Ex-Soviets in Israel

Domestication of space is a major problem for migrants, particularly when they settle in a geographically remote country with a markedly different climate and culture. This paper analyzes attitudes to city life in the country of origin and in the new homeland in personal narratives of immigrants to Israel from the countries of the former Soviet Union. The material was drawn from in-depth unstructured interviews conducted in 1999–2002 and 2005–2006, and Israeli Russian-language Internet forums. Soviet Jews were predominantly city dwellers, and their immigration stories are permeated with explicit and tacit comparisons of the space of the two countries. The cities of origin are idealized, and their image has disintegrated into hospitable and warm cities of pre-emigration life on the one hand, and unfamiliar, alien cities of post-Soviet period on the other. In Israel many ex-Soviets chose to live in the so-called development towns. Attracted by relatively inexpensive apartments, the newcomers found themselves trapped in places where jobs are scarce and the quality of life has been recently dropping. In reflecting on various towns, interviewees focus on physical and symbolic dimensions, the most frequent being: big–small, center–periphery, exposed–protected, and powerful–weak. In contemporary Russian culture center is associated with job opportunities and entertainment, with high social status and good quality of life. In Israel the opposition center–periphery has retained its significance, yet the whole country is considered by many immigrants as deeply provincial, cut off from the rest of the world and devoid of opportunity for the young, the conviction that is supported by publications in the Russian-language media.

L’influence des pratiques éducatives sur le sens donné à l’école : étude auprès de lycéens français

There are many studies exploring the link between meaning and learning. However, none of it examines the link between parental educational practices and the meaning of schooling. Based on a review of the literature, the objective of this article is to test the hypothesis of a link between the educational practices that high school students benefit from and the meanings that they attribute to school. Thus, we assume that educational practices play a predictive role in different processes of elaboration of the meaning of education by high school students (GH). The analysis of the results collected with the help of a measurement instrument consisting of two variables: the PEP – measuring parental educational practices – and the meaning of education (MOE) – measuring the meaning of education – questioning 390 French high school students, confirm our general hypotheses. Furthermore, it appears that a flexible educational practice is associated with a high level of meaning attributed to the school; conversely, a rigid educational practice is associated with a low level of meaning attributed to the school; and finally, a weak educational practice is not associated with an absence of meaning attributed to the school.     

Dyadic longitudinal models: A critical review

In this review, we discuss the most commonly used models to analyze dyadic longitudinal data. We start the review with a definition of dyadic longitudinal data that allows relationship researchers to identify when these models might be appropriate. Then, we go on to describe the three major models commonly used when one has dyadic longitudinal data: the dyadic growth curve model (DGCM), the actor–partner interdependence model (APIM), and the common fate growth model (CFGM). We discuss when each model might be used and strengths and weaknesses of each model. We end with additional thoughts that focus on extensions to new methods being discussed in the literature, along with some of the challenges of collecting and analyzing dyadic longitudinal data that might be helpful for future dyadic researchers.     

Mother–child relationship quality from preschool to adolescence: Variation by maternal education

Using longitudinal data from the National Institute of Child Health and Human Development Study of Early Child Care and Youth Development (N = 1088), we examine changes in maternal perception of closeness and conflict in the mother–child relationship from the child's preschool to adolescent years, with attention to variation by maternal education. Analyses using individual growth models show that mother–child closeness increases, while mother–child conflict decreases, from preschool to first grade. From first grade to age 15, mother–child closeness decreases, while mother–child conflict increases, both gradually. The decrease in mother–child conflict from preschool to first grade and the increases in mother–child conflict from first to fifth grade, sixth grade, and age 15 are less steep for mothers with a college degree than for mothers without a college degree. These findings underscore the importance of examining changes in parent–child relationships using longitudinal data across children's developmental stages and their variations by parental social and economic status.