The transference of visual search between two unrelated tasks: Measuring the temporal characteristics of carry-over

Investigations into the persistence of top-down control settings do not accurately reflect the nature of dynamic tasks. They typically involve extended practice with an initial task, and this initial task usually shares similar stimuli with a second task. Recent work shows that visual attention and search can be affected by limited exposure to a preceding, unrelated task, and the current study explored the temporal characteristics of this “carry-over” effect. Thirty-four participants completed one, four, or eight simple letter searches and then searched a natural scene. The spatial layout of letters influenced spread of search in the pictures, and this was further impacted by the time spent in the initial task, yet the carry-over effect diminished quickly. The results have implications for theories of top-down control and models that attempt to predict search in natural scenes. They are also relevant to real-world tasks in which performance is closely related to visual attention and search.     

Ethics in Research

Summary

This article presents an overview of the history of efforts to protect human subjects in research. It discusses the establishment of international, national, organizational, and institutional procedures designed to protect human participants. The article provides a detailed summary of the principal ethical codes for research and their origins. It includes discussions of the most frequently encountered ethical issues ranging from the initial decision to undertake the project, through the selection and application of the various research procedures, to the analysis and interpretation of the data.     

Factors that Predict Attrition from a State-Sponsored Rural Batterer Treatment Program

This study sought to identify factors associated with attrition for 197 individuals who participated in a state-sponsored rural domestic violence treatment program. Bivariate analyses identified 10 factors associated with program attrition. Logistic regression identified three of these (employment status, psychiatric disorder type, and probation status) as significant predictors of attrition. This three-factor model predicted 78% of all outcomes and 43% and 92% of dropouts and completers, respectively. The data suggest that batterer characteristics, particularly batterer psychopathology, unemployment, and criminal history, are more influential determinants of attrition than systemic and programmatic factors. These findings are discussed with respect to their congruence with the literature and their implications for policy, practice, and future research.     

Switching between global and local scopes of attention is resisted near the hands

Recently, several changes in perception, attention, and visual working memory have been reported when stimuli are near to compared to far from the hands, suggesting that such stimuli receive enhanced scrutiny. A mechanism that inhibits the disengagement of attention from objects near the hands, thus forcing a more thorough inspection, has been proposed to underlie such effects. Up until now, this possibility has been tested only in a limited number of tasks. In the present study we examined whether changes in one's global or local attentional scope are similarly affected by hand proximity. Participants analysed stimuli according to either their global shape or the shape of their constituent local elements while holding their hands near to or far from the stimuli. Switches between global and local processing were markedly slower near the hands, reflecting an attentional mechanism that compels an observer to more fully evaluate objects near their hands by inhibiting changes in attentional scope. Such a mechanism may be responsible for some of the changes observed in other tasks, and reveals the special status conferred to objects near the hands.     

The moderator role of followers’ personality traits in the relations between leadership styles,two types of task performance and work result satisfaction

Authentic leadership is changing our understanding of what makes good leadership. However, few studies have explored how followers’ individual differences and the nature of the task they perform affect its relation to followers’ work outcomes. We examine the moderator role of two core task types (intellective vs. generative) and two personality traits (conscientiousness and emotional stability) in the relationship between two leadership feedback styles (authentic vs. transactional) and task performance or work result satisfaction in a two-wave experiment. The sample consisted of 228 participants enrolled in an organizational psychology course, 34% of whom had work experience. Our results show that over time the effect of an authentic feedback style on task performance became stronger for those participants who previously scored very low on intellective tasks or very high on generative tasks. Furthermore, a significant three-way interaction between these two traits and our leadership feedback styles indicates that the effect of authentic feedback conforms different patterns depending on the followers’ personality traits and the type of task they perform. Moreover, authentic feedback had a stronger effect on participants’ work result satisfaction. Participants with low levels of either conscientiousness or emotional stability displayed higher levels of satisfaction in the authentic feedback condition.     

Testing relations between group cohesion and satisfaction in project teams: A cross-level and cross-lagged approach

Based on a two-dimensional perspective of group cohesion, this study examines the emergence of task cohesion and interpersonal cohesion in project teams and their roles in changes in members’ individual satisfaction with the team. Specifically, we tested a direct-effect and mediation model of the cross-level relationship between team task and interpersonal cohesion and individual satisfaction with the team over time. With a sample of 74 newly created project teams, the hypotheses were tested using a two-wave panel design. Results indicate that task cohesion emerges more strongly than interpersonal cohesion during the first stages of work in project teams. Moreover, the cross-lagged relationship between team interpersonal cohesion and individual satisfaction with the team was mediated by team task cohesion.     

The interactive effects of person-focused citizenship behaviour,task interdependence,and virtuality on team performance

A multifactorial between-groups experiment examined the effects of person-focused organizational citizenship behaviours (OCBP) on the performance of teams characterized by different levels of virtuality and task interdependence. Results reveal in low virtual teams the moderating effects of task interdependence on the OCBP–team performance relationship are positive; however, these effects are reversed in high virtual teams. Using social presence and task–technology fit theories, our results indicate that task context affects how OCBP impacts team performance, particularly across different levels of team virtuality. The implications for research on OCB and the management of virtual teams are discussed.     

大连市2006年～2012年流感流行特征分析

分析大连市流行性感冒(流感)的流行趋势和毒株流行情况.收集2006年～2012年大连市18家哨点医院流感监测数据进行描述性分析,并对流感样病例(ILI)咽拭子进行病毒分离检测.2006年～2012年监测医院共接诊患者10 751 432例,其中流感样病例676 860例,流感样病例占门诊病例的百分比(ILI％)为6.30％.流感流行高峰出现在2009年9月～11月和2006年3月～4月.0岁～4岁组和5岁～14岁组的ILI构成比例居前2位,7年间共检测流感样病例咽拭子1 174份,鉴定出流感病毒203株,阳性率为17.29％.2012年与2011年阳性率最高,分别为62.39％和12.15％.此间流感病毒主要以H3型、BY型为主.本文旨在通过监测掌握大连市流感毒株变异情况和流行规律,为下一步流感防控工作提供科学依据.     

Editorial: Drug Abuse and AIDS

Abstract

The present article presents an overview of the behavioral and psychological components which have been found to be associated with Type A behaviors in children and adolescents. Each component is discussed within the context of the assessment device used to measure it. with methodological concerns being addressed whenever appropriate. Using both observational methods and self-report questionnaires. the four major behavioral components of adult Type A behavior; competitive-achievement striving, time urgency, aggressiveness-hostility and impatience have been found in child/adolescent Type A subjects. Type A children have a lower self-esteem, a more external locus of control and higher anxiety level than their non-Type A counterpart. Coping mechanisms for stress and characteristic cognitions may differ in Type A subjects as they progress from childhood through adolescence. Recommendations for future research are presented.     

Math Weaknesses in Survivors of Acute Lymphoblastic Leukemia Compared to Healthy Children

Difficulties in math are the most frequently reported area of academic deficit in survivors of acute lymphoblastic leukemia (ALL) and the most frequent academic complaint among parents of ALL survivors. However, previous studies that included measures of math skills have been limited by the use of only a single measure of math skills, most often a measure of written calculations, without any assessment of math reasoning or math application skills. Further, the nature of these math difficulties has not been adequately investigated. The purpose of this study was to examine the performance of ALL survivors using multiple measures of math skills. Performance was compared to a group of healthy controls matched for age and sex as well as to normative levels. Other measures of neuropsychological function were also administered, and the relationships between these measures and the math measures were explored. Converging evidence for math difficulties in ALL survivors compared to healthy controls and normative levels was found. While ALL survivors generally performed within the average range on measures of math skills, math performance was mostly related to memory function and dominant-hand psychomotor speed. By contrast, math performance of healthy children was mostly related to basic reading skills and visual-motor integration. These findings shed light on the nature of math difficulties in ALL survivors and have implications for intervention.