The triadic systems model perspective and adolescent risk taking

In this special issue, Ernst (2014) outlines the triadic systems model, which focuses on the balanced interaction among three functional neural systems: the prefrontal cortex (regulation/control), striatum (motivation/approach), and amygdala (emotion/avoidance). Asynchrony in maturation timelines, coupled with less mature connectivity across brain regions, is thought to result in unique vulnerabilities for risk taking during the adolescent age period. Yet, the research evidence linking the triadic systems model to differences in risk taking across adolescence and adulthood is equivocal, and few studies have examined how neural development is associated with real-world behavior. In this commentary, we outline research on adolescent risk taking which highlights the importance of considering trait level and situational conditions when examining associations between neural systems and behavior, as well as the need to adopt a lifespan perspective.     

异步异构分层并行演化算法及其在串并系统可靠性优化中的应用(英文)

本文提出了一种新的并行演化算法――异步异构分层并行演化算法(AHHPGA),用于求解串并系统可靠性分配的多目标优化问题(RAP)。AHHPGA采用分层结构,上层由粗粒度模型构成,下层由细粒度模型构成。在AHHPGA的每个子种群中,采用不同的全局/局部搜索度和拓扑结构,构成异构模型。AHHPGA的迁移方式包括异步接收和异步迁出。采用基于模型的复杂系统可靠性评价工具(HiP-HOPS),以克服可靠性框图方法(RBD)的缺点。仿真结果表明,基于异步异构分层并行演化算法和HiP-HOPS工具的串并系统可靠性分配的多目标优化方法,优于传统的基于遗传算法的优化方法。     

Understanding reading as a form of language-use: A language game hypothesis

Reading research and research on conversation have followed different paths: While the research program for reading committed itself to a relatively static view of language, where objective text properties serve to elicit specific effects on cognition and behavior of a reader, research on conversation has embraced a language-use perspective, where language is primarily seen as a dynamic, context dependent process. In this essay I contrast these two perspectives, and argue that in order to reach a unified understanding of natural language – be it reading, talking, or conversing – one needs to adopt a language-use perspective. Furthermore, I describe how reading can be seen as a form of language-use, and how the current landscape of research on reading can be re-interpreted in terms of a dynamic, context-sensitive perspective on language. In particular, I propose that the concept of ‘language games’ serves as a good starting point to conceive reading as a form of language-use, describe how one can derive first concrete hypotheses by re-interpreting reading in terms of language games, and show how they can be readily operationalized using tools from dynamic systems analysis.     

Critique of Sharif’s and Pitt’s Models of Technology

abstract

In this article Pitt’s and Sharif’s models of technology are discussed. These models are based on two different conceptions of technology, which are technology as “instrument” and as “making use of instrument.” Sharif considers technology as a collection of empowering tools, including technoware, humanware, infoware and orgaware. On the other hand, Pitt sees technology as “humanity at work.” Based on his definition, Pitt proposes a model of technology with three components; first-order transformation, second-order transformation, and the assessment of feedback mechanism. In this article this model will be explained and criticized. After that, Sharif’s model is criticized in the light of Pitt’s theory and it will be shown that Pitt’s model provides a better understanding of different aspects of technology. For example, it will be argued how Pitt’s model is efficient in explaining dynamicity, transfer and control of technology along with its soft dimensions, while Sharif’s model is incapable of doing so. In the next part, Pitt’s model is criticized and it is shown that the mechanism of knowledge progress suggested by this model is controversial and Pitt’s framework cannot support the idea of indigenous technology. Furthermore, the ability of Pitt’s model in describing different technological phenomena is called into question, since this model provides a superficial view of the complexity of an assessment of technology’s consequences. Finally, a list is proposed that contains minimal requirements that every model of technology is expected to explain. It is incumbent on technology theoreticians to consider this list.     

Alter Egos: Notes on the basic Processes of specular Identification

Although identity is always dependant on observing minds, identification in physics and biology remains merely external, avoiding therefore the more serious problems of identity which arise in the presence of observed minds. Minds are defined in this paper as specular machines, i.e. systems capable of crossed self‐representations. Specularity is introduced as the primary condition of any objective identification, and self‐identification is presented as the core of specularity. Elementary illustrations are given of the role of specularity in both sociology and psychopathology.     

Peek-a-who? Exploring the dynamics of early communication with an interactive partner swap paradigm and state space grid visualization

Effective caregiver-infant communication occurs when interactive partners successfully coordinate multiple modalities (e.g., body movements, affect, eye gaze). The complex interplay of multiple modalities during caregiver-infant interactions is difficult to capture, which has made a comprehensive, evidence-based understanding of caregiver-infant communication difficult to achieve. We present a novel methodological approach to address this challenge by combining an Interactive Partner Swap (IPS) paradigm with a longitudinal design, detailed multimodal coding, and data visualization via state space grids (SSGs). We demonstrate the utility of our approach by presenting three sets of SSGs which reveal both dyadic flexibility and stability in caregiver-infant peek-a-boo interactions across three levels: micro (moment-to-moment), meso (interactive context), and macro (infant development). By using SSGs to explore the patterns that hold and others that differ systematically across interactive partner and infant development, our novel approach promises to offer critical first steps to creating a more detailed understanding of the dynamics of early multimodal communication.     

Vulnerabilities in Ghanaian orphans: Using the ecological systems theory as a lens

International studies have suggested that parental loss is a risk factor for poor physical and mental health, but all orphans do not develop the same kind and intensity of wellbeing indicators. This disparity is associated with certain biopsychosocial characteristics of the developing orphan which may interact with certain environmental factors to determine the levels of vulnerability a child may experience following parental death. While studies have been devoted to orphanhood in Ghana, no study has examined the nature of multisystemic risks within the sociocultural environment, and the factors within orphans which may interact to determine their experiences and developmental outcomes in Ghana. In the present paper, the Ecological Systems Theory is used to depict different vulnerabilities associated with orphanhood in the Ghanaian context. Using this theory, I demonstrate that Ghanaian orphans may experience vulnerabilities at all systems of the theory. Implications of the identified vulnerabilities for research, interventions and policy making are discussed.     

Reasoning across continuous landscapes: A nonlinear dynamical systems theory approach to reasoning

Dual-processing theories of reasoning have gained renewed attention in recent years, particularly in the fields of decision-making under uncertainty, learning, and social judgment. Although the various accounts differ, the common thread is the distinction between two qualitatively different reasoning processes, such as automatic/controlled, fast/slow, and unconscious/conscious. Accordingly, much research is focused on elucidating the nature of the two processes in terms of the kinds of information they process and respond to. Less extensive are attempts to identify mediators that underlie changes between the two reasoning strategies. We argue that nonlinear dynamical systems theory may be able to provide a fresh perspective on reasoning. Nonlinear dynamical systems theory allows us to shift the perspective to the dynamic interactions and transitions among continuous yet qualitatively different reasoning processes. We apply the approach to reasoning in decision-making and judgment under uncertainty. Our primary claim is that using different reasoning strategies is better understood as phase transitions among a landscape of continuous reasoning capacities.