Genetic and Environmental Influences on Personal and Rhythmic‐Motor‐Activity Tempo in Children: A Twin Study

In this study, we investigated the degree to which genetics and environmental factors influence the tempo and tempo stability of rhythmic motor activity in young children, using a twin study design. A total of 116 twin children, aged 4 years, were asked to strike two small clash cymbals together in a cyclical manner, in three phases. In the first phase, children were asked to maintain a comfortable personal tempo of rhythmic motor activity (spontaneous motor phase). In contrast, in the other phases, children were required to synchronize rhythmic motor activity in response to the timing of a stimulus tone, or a memorized tempo. Large additive genetic, although negligible shared environmental influences, were observed in the spontaneous motor phase. However, environmental factors were estimated in the other two phases, while the additive genetic factor was nearly zero. These results indicate that the extent of genetic and environmental influences on individual differences in rhythmic motor activity can be modulated under different situations.     

Predictors of childhood trajectories of overt and indirect aggression: An interdisciplinary approach

The aim of this study was to advance our understanding of the development of aggression in boys and girls by testing a model combining insights from both evolutionary theory and developmental psychology. A sample of 744 children (348 girls) between six and 13 years old was recruited in schools with high deprivation indices. Half of the sample (N = 372; 40.1% girls) had received special educational services for behavioral and/or socio‐emotional problems. Two trajectories for overt aggression and two trajectories for indirect aggression were identified and binomial logistic regressions were used to identify environmental predictors and sex‐specific patterns of these trajectories. Results indicated that peer rejection predicted overt aggression and indirect aggression and that extraversion and male sex predicted overt aggression. The results also showed that interaction between parental practices and some child temperament traits predicted overt aggression (coercion and lack of supervision associated with extraversion or low effortful control) or indirect aggression (coercion and neglect associated with negative affect or low effortful control), and the absence of a father figure predicted high indirect aggression in girls.

     

Variables that favour successful ageing / Variables que favorecen un envejecimiento exitoso

Abstract

The construct of successful ageing appears in the sixties, with a focus on physiological factors. However, its definition progressively develops into a more multidisciplinary construct and begins to include psychological, psychosocial and environmental factors; today, all these aspects are seen as essential to its study. In this monograph devoted to successful ageing, both this work and those that appear beside it aim to highlight the different areas of research that have been forged — mainly from psychology but also, in certain cases, together with associated disciplines — to try to outline a comprehensive model of ageing with the ultimate goal of creating intervention tools to foster successful ageing. Thus, this issue analyses the roles played by the Mediterranean diet, resilience, training programmes and training caregivers, among others, as explored by different experts in the area in an attempt to unveil the keys to ageing successfully from a psychosocial perspective.     

Effects of referential ambiguity,time constraints and addressee orientation on the production of morphologically complex words

In five experiments, participants were asked to describe unambiguously a target picture in a picture–picture paradigm. In the same-category condition, target (e.g., water bucket) and distractor picture (e.g., ice bucket) had identical names when their preferred, morphologically simple, name was used (e.g., bucket). The ensuing lexical ambiguity could be resolved by compound use (e.g., water bucket). Simple names sufficed as means of specification in other conditions, with distractors identical to the target, completely unrelated, or geometric figures. With standard timing parameters, participants produced mainly ambiguous answers in Experiment 1. An increase in available processing time hardly improved unambiguous responding (Experiment 2). A referential communication instruction (Experiment 3) increased the number of compound responses considerably, but morphologically simple answers still prevailed. Unambiguous responses outweighed ambiguous ones in Experiment 4, when timing parameters were further relaxed. Finally, the requirement to name both objects resulted in a nearly perfect ambiguity resolution (Experiment 5). Together, the results showed that speakers overcome lexical ambiguity only when time permits, when an addressee perspective is given and, most importantly, when their own speech overtly signals the ambiguity.     

Predicting stress patterns in an unpredictable stress language: The use of non-lexical sources of evidence for stress assignment in Russian

The main goal of this research was to examine how readers of Russian assign stress to disyllabic words. In particular, we tested the claim that the process of stress assignment in Russian can only be accomplished lexically. Eleven potential non-lexical sources of evidence for stress in Russian were examined in regression and factorial studies. In Study 1, onset complexity, coda complexity, the orthography of the first syllable (CVC1), of the second syllable (CVC2), and of the ending of the second syllable (VC2) were found to be probabilistically associated with stress in Russian disyllables. In Studies 2 and 3, it was shown that Russian speakers do use 3 of these cues (CVC1, CVC2, and VC2) when making stress-assignment decisions. These results provide evidence against the idea that the nature of stress in the Russian language is so unpredictable that stress assignment can only be accomplished lexically. These results also suggest that any successful model of stress assignment in Russian needs to contain mechanisms allowing these 3 orthographic cues to play a role in the stress-assignment process.     

Specific Life Events and Chronic Experiences Differentially Associated with Depression and Anxiety in Young Twins

Behavioral genetic analyses indicate that environmental influences associated with depression and anxiety are specific to each symptom type; however, this has not been tested specifically in children. Sixty-one (61) child twin pairs in which at least one twin had a very high anxiety or depression score, and 29 nonanxious, nondepressed pairs were interviewed about life events and chronic stressors in the previous 12 months. Loss events, schoolwork stressors, family relationship problems, and friendship problems were all significantly associated with depression but not anxiety. Threat events were significantly associated with anxiety but not depression. Loss events and schoolwork stressors appeared to act as shared environment influences in that they made twin pairs resemble one another. Threat events, friendship problems, and family relationship problems were individual specific and accounted for differences within the pairs. These results clarify the associations between life events and depressive and anxious symptoms in children and adolescents and reveal specific associations previously unidentified in this age range.     

Schizophrenia Epigenesis?

I begin by examining how genetics drivesschizophrenia research, and raise both familiar andrelatively novel criticisms of the evidence putativelysupporting the genetic basis of schizophrenia. Inparticular, I call attention to a set of concernsabout the effects of placentation on concordance ratesof schizophrenia in monozygotic twins, which furtherweakens the case for schizophrenia's so-called stronggenetic component. I then underscore two criticalpoints. First, I emphasize the importance of takingseriously considerations about the complexity of bothontogenesis and the development of hereditarydiseases. The recognition of developmentalconstraints and supports is crucial, for attention todevelopment exposes the naivete of too many models ofgene action in the aetiology of disease. Secondly, Iattend to those schizophreniologists who ignoremethodological criticisms and thus presume a geneticbasis for schizophrenia, and then seek the schizophrenic genotype lacking an adequatephenotype. In response I attempt to demonstrate thenecessity of a sustained effort at characterizing thephenotype of schizophrenia as an enabling conditionfor the whole enterprise of psychiatric genetics – andfor psychiatry itself. Without the organism-levelphenotype, research at the level of genes will remainunproductive – assuming of course that research at thegenetic level is appropriate at all.     

The complex challenges of ethical choices by engineers in public service

This paper proposes that engineers in public service are confronted with unavoidable complexity in their ethical considerations. The complexity begins with interactions among venues of ethical choices. Engineers must make ethical choices simultaneously at the individual, professional, organizational and societal levels. These ethical domains often conflict. The complexity also stems from situations in which physical properties may remain stable, but important social, economic, institutional and political conditions can change substantially. The paper proposes that the reflective learning approach of pragmatism can help with these challenging situations. This approach depends upon employing Dewey’s five stage process of inquiry to engage the ethical complexity inherent in the practice of engineering in the public service. An earlier version of this paper was presented at the 2005 conference, Ethics and Social Responsibility in Engineering and Technology, Linking Workplace Ethics and Education, co-hosted by Gonzaga University and Loyola Marymount University, Los Angeles, CA, USA, 9–10 June 2005.     

Effects of self-complexity on mood-incongruent recall

Some people cope with negative moods by retrieving positive memories, which is mood-incongruent recall. Though mood-incongruent recall is helpful for mood-regulation, the factors that influence people's ability to utilize mood-incongruent recall are not well understood. This study investigated whether complex knowledge structure is a factor for the ability of mood-incongruent recall, based on self-complexity. In the experiment, 50 participants were requested to recall positive memories in both neutral and negative moods. The results of this study indicated that self-complexity was an important factor associated with participants' ability to recall positive memories while they were in negative moods. Participants who rated high in self-complexity were those whose knowledge is structured in a complex way, recalled more highly positive memories in negative moods than in neutral moods. On the other hand, participants who were rated low in self-complexity with simple knowledge structures recalled memories with a lower extent of positivity in negative moods than those in neutral moods.     

人格理论的系统发展观初探

文章以遗传论、精神动力论、学习论、特质论、社会文化及认知一情感系统理论为基础。利用系统科学中的系统论观点,对人格理论进行系统发展观分析。该观点将人格看作一个复杂的“大”系统,它包括外部系统和内部系统两部分。外部系统即外环境系统,内部系统则分为个体心理系统和个体行为系统,其核心是个体心理系统,它由认识系统、情意系统、自我系统及需要系统构成。人格的形成是内外两个系统相互作用、循环运动的结果。