Preference in rhesus monkeys given a choice between cocaine and d,l-cathinone

Previous experiments have shown that both cocaine and d,l-cathinone can function as positive reinforces when delivered intravenously to rhesus monkeys. However, the relative reinforcing efficacies of these compounds have not been established. In the present experiment, three rhesus monkeys were allowed to choose between saline and several doses of d,l-cathinone or cocaine as well as between several doses of both drugs in a discrete-trial choice procedure. Sufficient doses (.05 to .2 mg/kg/injection) of either drug maintained self-administration and the higher doses were reliably preferred to saline. Doses of d,l-cathinone that were preferred to saline were then compared to a range of cocaine doses in drug-drug choice. As the dose of d,l-cathinone that was available was increased, an increase in cocaine dose was necessary to maintain cocaine preference. Comparison of drug-drug choice data to dose combinations predicted to be chosen with equal frequency revealed that the reinforcing efficacy of d,l-cathinone was equivalent to that of cocaine.     

Pentobarbital self-administration in rhesus monkeys: drug concentration and fixed-ratio size interactions.

Performances of three rhesus monkeys were reinforced by the oral delivery of pentobarbital and studied as functions of fixed-ratio size and drug concentration. Pentobarbital solutions and water were concurrently available on identical reinforcement schedules from separate liquid-delivery systems during 3-hour sessions. Under a fixed-ratio 16 schedule of drug availability, a descending series of drug concentrations was tested (4, 2, 1, 0.5, 0.25, 0.125, and 0.0625 mg/ml, followed by a retest at 4 mg/ml). Partial concentration series beginning with the highest concentration were repeated with fixed-ratios of 32 and 64, with a fixed-ratio 128 for two monkeys, and with fixed-ratio 256 for one. At each fixed-ratio value, response rate and number of drug deliveries were inverted U-shaped functions of pentobarbital concentration. Drug intake (mg/kg/session) increased directly with drug concentration. As the fixed-ratio size was increased, the number of liquid deliveries decreased. For each drug concentration, when the numbers of drug deliveries at fixed-ratios of 32, 64, and 128 responses were plotted as percentages of those obtained at fixed-ratio 16, the following orderly relationship emerged: the higher the drug concentration, the less that drug deliveries were decreased by increases in fixed-ratio size. This relationship indicates an increase in reinforcing efficacy with increases in pentobarbital concentration.     

Understanding Change in Social-Movement Participation: The Roles of Social Norms and Group Efficacy

Across the globe, collective action has been a notable driver of social change. Previous research has identified numerous psychological antecedents of collective action participation, such as group efficacy. The mobilizing influence of social norms, however, has been comparatively neglected. Among a nationally representative Chilean sample (N = 3328), a three-wave longitudinal study tested the relationship between the perceived frequency of family and friends' participation in social movements (norms of close social networks) and change in the frequency of participants' own engagement over time. Perceived efficacy of social movements to facilitate social change was tested as a mediator of this relationship. A fully constrained bidirectional cross-lagged panel model revealed that norms of close social networks significantly predicted social-movement participation over time. This longitudinal relationship was also significantly mediated by group efficacy. Direct reverse paths were also observed, with social-movement participation predicting norms of close social networks over time. Considering low degrees of political participation often seen in societies, these results suggest that utilizing the normative context to promote participation in social movements may prove fruitful in mobilizing the drive for social change.     

The interplay of community and family risk and protective factors on adjustment in young adult immigrants

We examined the direct and interactive effects of community violence and both family cohesion and conflict on collective efficacy and aggressive behaviours among immigrant young adults. Participants included 221 young adults (ages 18–26; mean age = 21.36; 45.7% female, 190 born outside the U.S.) who completed self-report measures of their exposure to neighbourhood violence, social cohesion, collective efficacy and prosocial behaviours toward friends and strangers. Results, in general, showed that community violence and family cohesion were positively associated with collective efficacy whereas community violence and family conflict were positively associated with aggressive behaviours. Family cohesion and conflict also moderated the links between community violence and aggressive behaviours. Discussion focuses on the interplay of community and family processes and the relations to adjustment of immigrant young adults.     

IMPACT OF REFLECTIVE SUPERVISION ON EARLY CHILDHOOD INTERVENTIONISTS’ PERCEPTIONS OF SELF‐EFFICACY,JOB SATISFACTION,AND JOB STRESS

Despite widespread recognition of the importance of reflective practice in the field of infant mental health, little quantitative research exists regarding the impact of reflective supervision on professionals’ self‐efficacy, job satisfaction, and work‐related stress. Thirty‐three early childhood interventionists received approximately 9 months of reflective supervision and completed pre‐ and post‐assessments of their job‐related stress and self‐efficacy using a modified version of the Reflective Supervision Self‐Efficacy Scales for Supervisees (S. Shea, S. Goldberg, & D.J. Weatherston, 2012). At the post‐assessment, participants also rated their overall experience of reflective supervision. Reported self‐efficacy increased significantly from pre‐ to post‐assessment, and participants reported a positive overall impact of reflective supervision with respect to a variety of indices, such as job satisfaction, professional development, and the ability to cope with job‐related stress. These results provide necessary quantitative data demonstrating a positive impact of reflective supervision on early childhood professionals and suggest the value of reflective supervision for supporting workforce development.     

Teacher Efficacy In the Context of Teaching Low Achieving Students

This paper focused on the efficacy of Singapore teachers who teach low achieving adolescent students. Three dimensions of self-reported teacher efficacy—instructional strategies, classroom management, and student engagement—were examined in relation to teacher attributes and the teacher–student relationship. Data were obtained from the Teacher Self-Efficacy Scale Tschannen-Moran and Woolfolk Hoy (Teaching and Teacher Education 17:783–805, 2001) and the Teacher–Student Relationship Scale Ang (The Journal of Experimental Education 74:55–73, 2005). Significant differences between novice teachers and experienced teachers emerged in teacher efficacy beliefs in relation to instructional strategies, classroom management, and student engagement. Conflict in teacher–student relationship was found to predict teacher efficacy for teachers of low achieving students. Implications for teachers’ professional development were discussed.     

团队情绪氛围对团队创新绩效的影响机制

基于85个团队的团队领导和475名团队成员的配对数据, 考察了团队情绪氛围、情绪劳动及团队效能感对团队创新绩效的影响机制。结果发现：团队中有两种类型的情绪交换—— 团队情绪氛围是团队内部的情绪交换, 而情绪劳动是团队成员对外的情绪交换。高强度的情绪劳动(高外部情绪交换)具有情绪资源攫取的效果, 削弱了团队积极情绪氛围与团队创新绩效之间的关系; 当团队工作的情绪劳动程度较高时, 团队较低的积极情绪氛围对于团队创新反而有更强的促进作用。团队积极情绪氛围(团队内部的积极情绪交换)对于团队效能感有促进作用。团队情绪氛围与情绪劳动的交互作用以团队效能感为完全中介进而影响团队创新绩效。     

运用比较治疗学的方法促进T2DM胰岛素治疗决策的最优化

2型糖尿病（T2DM）为内分泌科常见疾病,胰岛素是最主要的治疗药物之一,但胰岛素治疗方法诸多,各种方案的疗效参差不齐。为了促进2型糖尿病治疗决策的最优化,本文通过利用检索国内报道的相关文献,对文献中2型糖尿病的胰岛素治疗方法进行归纳总结,并且运用比较治疗学的研究方法进行比较分析,旨在寻求最有效的治疗方案。     

影响职业决策自我效能的因素及干预研究述评

职业决策自我效能指个体对自己完成择业相关任务所需能力的信心程度。自从Betz和Taylor提出职业决策自我效能,该概念已引发了职业心理学中众多的理论和实证研究。文章总结了影响职业决策自我效能的因素及其干预措施。影响职业决策自我效能因素可概括为个体因素、家庭因素、学校因素三方面,干预措施依据不同的理论,主要有归因训练、团体干预、职业决策训练、认知重构、计算机职业指导系统等     

社交网站中的自我呈现对青少年友谊质量的影响:积极反馈的中介作用

随着网络的日益普及,社交网站已成为人们活动的新领域和人际交往的新媒介。为探讨社交网站中不同的自我呈现方式、积极反馈与友谊质量的关系,采用问卷法对来自武汉市两所普通中学的817名10~19岁的学生进行调查,其中,男生423人,女生366人。研究采用偏差矫正的百分位Bootstrap法,使用Hayes(2012)编制的SPSS宏对中介效应进行检验,结果发现:(1)真实自我呈现和积极自我呈现与积极反馈、友谊质量显著正相关;(2)社交网站中的真实自我呈现既能直接预测青少年的友谊质量,也能通过积极反馈的中介作用对友谊质量产生影响,而积极自我呈现对青少年的友谊质量没有直接预测作用,只能通过积极反馈的完全中介作用对友谊质量产生影响。