The facilitative effect of positive stimuli on 3-year-olds’ flexible rule use

This study examined the effect of emotional stimuli on 3- to 4-year old children's flexible rule use, as measured by the Dimensional Change Card Sort (DCCS). In Experiment 1, children in two countries (Canada and China) were given 2 versions of the DCCS. The Standard version required children to sort red and blue boats and rabbits first by shape and then by color (or vice versa); the Emotional Faces version required children to sort happy and sad male and female faces first by emotion and then by gender (or vice versa). Children performed significantly better on the Emotional Faces version, and performance on the 2 versions was related. Order in which dimensions were presented had no effect. Experiment 2 examined which aspects of the emotional faces were responsible for the facilitation of children's performance. Performance on the Standard version was compared to performance on three contextual faces versions, in which children were shown happy, sad, or neutral faces and required to sort them by age (child versus adult) and then by gender (or vice versa). Facilitation was only seen in the context of happy faces. Results are consistent with the suggestion that positive stimuli promote cognitive flexibility, perhaps by increasing dopamine levels in prefrontal cortex.     

娱乐场所服务女性的行为学调查

调查娱乐场所服务女性的性行为特征及其安全套使用情况,为预防性病/艾滋病健康教育和政策制定提供参考信息。采用立意抽样方法对我省南昌和萍乡两地娱乐场所服务女性进行问卷调查。娱乐场所服务女性卖淫比例较高,卖淫者安全套使用比例和频率不高,且卖淫者安全套使用存在不平衡现象。必须进一步加大宣传教育力度及强化干预工作。     

抗菌药物合理应用的宏观和微观问题

抗菌药物不合理应用现象长期得不到纠正,细菌耐药稳步攀升,正引起医学界、社会和政府的高度关注。本文就宏观上的抗菌药物使用政策与微观上的临床用药两方面存在的问题进行探讨。介绍了国际上关于抗菌药物政策的研究以及抗菌药物合理使用的新观点（尽早开始经验性治疗、“降阶梯”治疗策略、运用抗菌药物PK／PD原理指导临床用药、短程治疗）。主张调整宏观抗生素策略,去除该政策单纯、片面限制使用和应用药敏实验结果指导临床用药绝对化的做法。吸纳国际上的新成果,强化监管力度,更多采用教育和技术手段。     

Treatment Engagement with Caregivers of At-risk Children: Gaps in Research and Conceptualization

The high rates of dropping out and other engagement problems are significant concerns in the delivery of mental health and adjunct services to the families of at-risk children. Consequently, researchers have examined the correlates of attrition and have developed interventions to increase engagement and retention. However, the lack of a clear definition of engagement and gaps in theory about the relationship of engagement to other treatment processes hinder knowledge development. In this paper the behavioral and attitudinal aspects of engagement are disentangled. Current knowledge about treatment barriers and interventions to increase appointment keeping is summarized. A preliminary conceptualization of the engagement process is presented and research needs and practice implications are discussed.     

Religiousness as a Protective Factor for Substance Use in Dance Sport

Although religiousness is found to be a significant protective factor in substance use, there is an evidential lack of studies of such in athletes. The aim of the study was to identify the predictive value of the religiousness and some social, educational, and sport factors on substance use in 43 sport dancers. An originally developed questionnaire for studying substance use and precipitation factors was applied. The Chi-square showed male dancers as more religious than females. Using the Spearman’s correlation, religiousness was found to be a significant protective factor in cigarette smoking, sport nutritional supplementation, and the likelihood of doping. Data were interpreted emphasizing the previous findings from the literature.     

Flexible cue use in food-caching birds

An animal’s memory may be limited in capacity, which may result in competition among available memory cues. If such competition exists, natural selection may favor prioritization of different memory cues based on cue reliability and on associated differences in the environment and life history. Food-caching birds store numerous food items and appear to rely on memory to retrieve caches. Previous studies suggested that caching species should always prioritize spatial cues over non-spatial cues when both are available, because non-spatial cues may be unreliable in a changing environment; however, it remains unclear whether non-spatial cues should always be ignored when spatial cues are available. We tested whether mountain chickadees (Poecile gambeli), a food-caching species, prioritize memory for spatial cues over color cues when relocating previously found food in an associative learning task. In training trials, birds were exposed to food in a feeder where both spatial location and color were associated. During subsequent unrewarded test trials, color was dissociated from spatial location. Chickadees showed a significant pattern of inspecting feeders associated with correct color first, prior to visiting correct spatial locations. Our findings argue against the hypothesis that the memory of spatial cues should always take priority over any non-spatial cues, including color cues, in food-caching species, because in our experiment mountain chickadees chose color over spatial cues. Our results thus suggest that caching species may be more flexible in cue use than previously thought, possibly dependent upon the environment and complexity of available cues.     

Prospective Relations Between Organized Activity Participation and Psychopathology During Adolescence

This longitudinal study examined psychopathology as a predictor and outcome of organized activity involvement during high school among 198 adolescents who varied in risk for psychopathology as a function of their mother's depression history. Higher levels of internalizing and externalizing symptoms in eighth grade significantly predicted lower levels of involvement in academic clubs during high school, over and above risk and SES. Tobacco use prior to high school predicted lower levels of involvement overall and in academic clubs and performance arts. Controlling for psychopathology prior to high school, higher levels of activity involvement were associated with lower levels of externalizing symptoms, less tobacco use, and fewer diagnoses of behavior disorders and substance abuse in 12th grade. The positive association between risk and adolescent psychopathology was not buffered by adolescent activity involvement. Overall, these findings suggest that involvement in organized activities may contribute to lower levels of externalizing psychopathology during high school even when controlling for prior psychopathology.     

The Social Contextual Approach and Rural Adolescent Substance Use: Implications for Prevention in Rural Settings

Adolescents in rural areas use substances at rates comparable to urban adolescents; understanding causes of rural adolescent substance use is critical if prevention efforts are to succeed. The present review has three primary goals: (1) to define rural, (2) to evaluate the empirical evidence regarding correlates and causes of rural adolescent substance use from a social contextual framework (L. V. Scaramella, R. D. Conger, R. Spoth, & R. L. Simons, in press), and (3) to discuss the malleability of theoretically based risk or protective factors in rural settings. The review concludes with a discussion of the difficulties and challenges of implementing prevention programs in rural areas.     

Psychiatric disorders and the use of mental health services among children involved in bullying

This study had two aims: to evaluate the relationship between bullying and psychiatric disorders and to study the probability of using mental health services among children involved in bully/victim problems. The data consisted of interviews with 423 parents and 420 children. Diagnostic measures were based on the Isle of Wight Interview. Children involved in bullying as bullies, bully‐victims, and victims were compared with other children. Children involved in bully/victim problems were more prone to have psychiatric disorders than noninvolved children. The probability of being disturbed was highest among male bullies, followed by male bully‐victims and female victims (9.5‐fold, 7.9‐fold, and 4.3‐fold, respectively) compared with noninvolved same‐sex children. The most common diagnoses among children involved in bully/victim problems were attention deficit disorder, oppositional/conduct disorder, and depression. Furthermore, children involved in bully/victim problems were more likely to have used mental health services at some time during their lives and also during the previous 3 months. Special attention should be paid to children’s mental health when dealing with bullying problems at school. Referral pathways to mental health services and factors affecting the referral processes among children should be further studied. Aggr. Behav. 27:102–110, 2001. © 2001 Wiley‐Liss, Inc.     

3~5岁儿童理解和使用空间表征的特点

以96名3~5儿童为被试,采用自编的儿童空间表征实验任务,在语言表征、模型表征和图画表征三种空间表征形式上,考察了儿童理解和使用空间表征的发展特点。结果表明:(1)总体上,3~5岁儿童理解空间表征的发展水平均显著高于使用空间表征的发展水平。(2)3~5岁儿童理解和使用空间表征的发展表现出显著的年龄效应。(3)从不同的空间表证形式来看,3岁儿童理解语言表征的能力与理解模型表征的能力之间差异显著,4岁儿童使用语言表征的能力与使用模型表征的能力之间的差异、使用语言表征的能力与使用图画表征的能力之间的差异、以及使用模型表征的能力与使用图画表征的能力之间的差异都显著,其余形式的空间表征理解之间的差异或空间表征使用之间的差异在各年龄段中均不显著。