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131.
In standard visual search experiments, observers search for a target item among distracting items. The locations of target items are generally random within the display and ignored as a factor in data analysis. Previous work has shown that targets presented near fixation are, in fact, found more efficiently than are targets presented at more peripheral locations. This paper proposes that the primary cause of this “eccentricity effect” (Carrasco, Evert, Chang, & Katz, 1995) is an attentional bias that allocates attention preferentially to central items. The first four experiments dealt with the possibility that visual, and not attentional, factors underlie the eccentricity effect. They showed that the eccentricity effect cannot be accounted for by the peripheral reduction in visual sensitivity, peripheral crowding, or cortical magnification. Experiment 5 tested the attention allocation model and also showed that RT X set size effects can be independent of eccentricity effects. Experiment 6 showed that the effective set size in a search task depends, in part, on the eccentricity of the target because observers search from fixation outward.  相似文献   
132.
Six groups of 20 subjects each were run individually in a binary prediction situation with each alternative occurring equally often. Two age groups were employed; subjects were either in second or sixth grades. For one-third of the subjects at each age level, the events occurred in runs of either two or six; another third observed events which occurred in runs of either five or six; the other subjects received a random sequence of events. All subjects then received an additional 50 trials in which every prediction was correct. The results indicated some sensitivity to run length characteristics. Fewer errors of all types were made in the prediction of 5–6 sequences. The verbal reports and all-correct trial protocols revealed that at least the sixth graders employed some simple run length structure rules, although many instances of runs other than those presented in training occurred, showing much processing error. The results were discussed in terms of a general limited-capacity model of information-processing.  相似文献   
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Institutional religious involvement wanes during young adulthood, but evidence suggests life‐course factors such as family formation bring people back to religion. Using the National Longitudinal Study of Adolescent to Adult Health (Waves 1, 3, and 4), we examine how often young adults who were involved in institutional religion as adolescents return—measured by religious service attendance and religious affiliation—after leaving in emerging adulthood, and how this return is patterned by family formation. The majority of young adults who leave do not return to regular religious service attendance, regardless of their family formation. But single parents, married parents, and childless married individuals are more likely, and childless cohabiting couples less likely, to return to religious communities than those who are both single and childless. Only married parents are more likely than childless singles to reaffiliate, though there is marginal evidence that childless married adults may also be more likely. Thus, the institutions of religion and family are still linked, even though overall levels of religious return are not as high as expected.  相似文献   
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ASD and ADHD are regarded as distinct disorders in the current DSM-5. However, recent research and the RDoC initiative are recognizing considerable overlap in the clinical presentation of ASD, ADHD, and other neurodevelopmental disorders. In spite of numerous neuroimaging findings in ASD and ADHD, the extent to which either of the above views are supported remains equivocal. Here we compare structural MRI and DTI literature in ASD and ADHD. Our main findings reveal both distinct and shared neural features. Distinct expressions were in total brain volume (ASD: increased volume, ADHD: decreased volume), amygdala (ASD: overgrowth, ADHD: normal), and internal capsule (ASD: unclear, ADHD: reduced FA in DTI). Considerable overlap was noted in the corpus callosum and cerebellum (lower volume in structural MRI and decreased FA in DTI), and superior longitudinal fasciculus (reduced FA in DTI). In addition, we identify brain regions which have not been studied in depth and require more research. We discuss relationships between brain features and symptomatology. We conclude by addressing limitations of current neuroimaging research and offer approaches that account for clinical heterogeneity to better distinguish brain-behavior relationships.  相似文献   
137.
Using Conger’s family stress model as a theoretical framework, a series of mediated associations among economic hardship, perceived economic pressure, parental depression, marital conflict, psychologically controlling parenting, and children’s reticent behaviors in Romanian families were studied. The sample consisted of 121 Romanian mothers and fathers of 4–5-year-old children. Children’s kindergarten teachers living in urban and rural locations evaluated child reticence. Findings generally support the family stress model. Structural equation modeling showed that after controlling for living in a rural location, economic pressure was indirectly linked with marital conflict through depression. Depression was indirectly related to psychological control through marital conflict, and marital conflict was indirectly linked to child reticence through psychological control. Directions for future research and recommendations for interventions and public policy are described.  相似文献   
138.
This study investigated the extent to which employees’ perception of ethical leadership moderated their organisational commitment and organisational citizenship behaviour. A non-probability purposive sample (N = 839; females = 32%) of employees in a railway organisation in the Democratic Republic of Congo (DRC) participated in the study. They completed the following measures: the Organisational Commitment Scale (OCS), the Organisational Citizenship Behaviour Questionnaire (OCBQ) and the Ethical Leadership Scale (ELS). Stepwise hierarchical regression analysis was utilised to determine the influence of employees’ perceptions of the relationships between their self-reported organisational commitment and organisational citizenship behaviour. The results indicated employee perceptions of the integrity, fairness and honesty aspects of ethical leadership to explain their affective, continuance and normative aspects of organisational commitment and organisational citizenship behaviour. The results also showed that employee perceptions of high ethical leadership influenced their willingness to engage in positive organisational commitment such as psychological attachment, work continuance, normative commitment and also their organisational citizen behaviours such as altruism, conscientiousness, courtesy and civic virtue. By implication, leaders with high ethical conduct have the potential to positively stimulate the commitment of employees towards supporting the organisational values and mission.  相似文献   
139.
This study examined the mediating effect of ethical leadership on the relationship between workplace ethics culture and work engagement among employees in a railway transport organisation in the Democratic Republic of the Congo (DRC). The sample consisted of permanently employed staff in a railway organisation in the DRC (n = 839; females = 32%). The employees were required to complete the Ethical Leadership Scale (ELS), the Ethical Corporate Virtue model (ECV) and the Utrecht Work Engagement Scale (UWES). Mediating regression analyses were conducted to predict work engagement from workplace ethics culture, partialling out ethical leadership. The results show that workplace ethics culture had a significantly positive effect on work engagement. The results further indicated that workplace ethics culture, through the mediation of perceived ethical leadership, had a significantly positive effect on the work engagement dimensions of vigour, dedication and absorption. The findings provide evidence that ethical leadership plays a crucial role in shaping workplace ethics culture and employees’ level of work engagement in an emerging country work setting.  相似文献   
140.
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