Methodological problems in the use of participant observers

A multiple baseline design across observed students and teachers was used to investigate the relationship between observations by participant observers and changes in the behavior of those observed ("observee" reactivity) and the observers (observer-mediator reactivity). Two teachers recorded consecutively the appropriate student verbalizations of four students and two teachers recorded the inappropriate student verbalizations of four students. Independent observers simultaneously recorded student verbalizations (appropriate and inappropriate) as well as teacher behaviors (positive, negative, and instruction) throughout all phases of the study. The results substantiated the prediction of "observee" reactivity and observer-mediator reactivity in one of four classrooms. The results of the present study suggest that in some instances, observations by participant observers may result in changes in the behavior of those being observed ("observee" reactivity) and/or the observers (observer-mediator reactivity).     

父母冲突对青少年抑郁的影响:认知反应性的中介作用

采用父母冲突儿童知觉量表(CPIC)、抑郁体验问卷(DEQ)、莱顿抑郁敏感指数量表(LEIDS)测量753名高中生,以便分析认知反应性在父母冲突与抑郁之间的中介作用。结果表明:(1)父母冲突显著正向预测认知反应性; 认知反应性显著正向预测青少年抑郁;(2)认知反应性在父母冲突与青少年抑郁之间具有完全中介作用。因此,认知反应性作为中介变量,父母冲突通过认知反应性对青少年抑郁具有稳定的间接作用。     

两类线索相容性的比较研究

研究运用前置线索的实验模式,采用对颜色刺激进行不一致颜色命名的实验任务,考察了线索与刺激和反应的维度重合关系、线索的呈现时距和线索的有效慨率对命名时间的影响。研究表明：在无刺激一反应相容性的情况下,当线索一刺激和线索一反应这两类线索相容性同时存在却相互竞争时,线索一刺激的相容性强于线索一反应的相容性,只显示出线索一刺激的相容性效应。同时,实验结果证明了线索一刺激相容性效应仍然遵循适时性的特征,受到线索呈现时距的影响,并随线索客观有效慨率的增加而增强。     

海洛因戒断者吸毒及情绪注意偏向的ERP研究

海洛因戒断组对吸毒、正、负性线索注意偏向是理解戒断者复吸脑机制的重要手段之一。研究采用dot-probe实验范式,海洛因戒断组及正常被试各10名,分别记录64个电极点脑电数据。结果表明,戒断者吸毒线索注意偏向P200振幅显著高于正负性情绪线索,也显著高于正常组,提示戒断者存在吸毒线索注意偏向;N300振幅显著低于正常组,说明戒断者具有较低的情绪评价;吸毒线索诱发P300振幅显著高于正常组,表明戒断组对吸毒线索可能附加情绪加工。     

Process Analyses of Impulsive Behavior in Binge-Eating Disorder During the Randomized Controlled IMPULS Trial

Impulsivity represents a risk factor for patients with binge-eating disorder, and we therefore investigated the treatment process of impulsive behaviors including binge-eating episodes in the randomized controlled IMPULS trial. Using 8 weekly online questionnaires throughout the assessment period, we compared 41 patients participating in the IMPULS program, which emphasized impulsive eating behavior (IG), with 39 control patients who received no intervention (CG). We assessed the frequency of binge eating, other impulsive behaviors, situations in which such behaviors could be inhibited, and the execution of alternative behaviors. Results indicate a stronger binge-eating reduction in the IG compared to the CG at the fifth, seventh, and eighth treatment weeks. Overall, both groups reduced other impulsive behaviors. They did not differ in the amount of inhibited impulsive behaviors and showed similar alternative behaviors, “distraction” most frequently used. IG patients evaluated the IMPULS program as very helpful. The stronger reduction of binge eating in the IG and positive evaluation of the treatment indicate a specific treatment effect regarding impulsive eating behavior. The reduction of other impulsive behaviors across both groups, and the initial reduction of binge eating within the CG, could be explained by an increased degree of self-observation.     

Cortisol reactivity and negative affect among preterm infants at 12 months during a mother-infant interaction task

The purpose of this study was to investigate correlates of preterm (PT) infant’s cortisol reactivity and the association to infant negative affect, during a mother-infant interaction procedure. Participants included 48 infants born prematurely (gestational age < 37 weeks) and their mothers, assessed when infants were 12 months old corrected for prematurity. The examined variables comprised both neonatal and environmental dimensions including maternal interactive behavior. Infant negative affect and maternal interactive behavior were assessed with a standardized mother-infant interaction task. A baseline infant saliva sample was collected before the interaction began, and a second sample after the interaction episodes ended. Results revealed that decrease of infant’s cortisol concentration was significantly associated with the exposure to more sensitive, and less intrusive maternal behaviors. However, once controlled for neonatal risk, family SES and maternal psychological distress, the associations were rendered non-significant. Although the association between cortisol reactivity and negative affect trended toward significance, maternal intrusiveness was the only significant predictor of observed infant negative affect. Findings suggest the importance of primary relational experiences on PT infants' early regulatory competencies.     

Comparing emotional reactivity and regulation in infants born ELGA and VLGA

Emotional reactivity and regulation behaviors were compared in infants born extremely low gestational age (ELGA) and very low gestational age (VLGA) during the still-face procedure. Infants born ELGA demonstrated greater emotional reactivity and displayed less frequent gaze avoidance, more frequent gestures, and more self-comforting behaviors.     

The anger–distress model of temper tantrums: associations with emotional reactivity and emotional competence

The goals of this investigation were (a) to assess the structural validity of the anger–distress model of temper tantrums, and (b) to examine the associations among temper tantrums, emotional reactivity and emotional competence in a community sample of preschoolers. A parent‐report measure, the Temper Tantrum Grid, was used to measure the frequency of common tantrum behaviours. Laboratory and parent‐report measures of emotional reactivity and emotional competence were administered. Confirmatory factor analysis supported the proposal that anger and distress are separate but overlapping tantrum processes. Correlation analyses showed that temper tantrum anger and distress were related to emotional reactivity and emotional competence. There was no evidence to support the notion that emotional competence moderated the effect of emotional reactivity on temper tantrums. In contrast, emotional competence was a significant mediator of the association between emotional reactivity and temper tantrums. Overall, the results support the anger–distress model of temper tantrums. The findings suggest that children's temper tantrums are systematically related to the overall organization of emotion and behaviour in preschool children. Copyright © 2010 John Wiley & Sons, Ltd.     

不同药物相关线索反应下感觉-运动脑区的激活及作用

药物相关线索反应不仅表现在心理渴求, 也表现在强迫性用药行为上。相关线索下, 除包括奖赏环路在内的边缘系统被激活外, 感觉-运动脑区也被激活, 引发自动化动作图式的表达, 这对相关线索反应及复吸行为具有特殊的意义。是否所有相关线索都会激活感觉-运动脑区, 目前, 还不清楚, 而这对临床治疗具有重要意义。本研究采用磁共振扫描, 生理测试等方法探索了不同类型相关线索下, 海洛因成瘾戒断者的大脑激活状况, 试图了解他们在不同线索刺激下的大脑反应。采用组内实验设计, 测量29名海洛因成瘾者相关线索反应下的血氧水平。结果发现, 相比对照线索, 所有药物相关线索, 包括药物、用药工具、用药动作线索都更多激活扣带回、海马、舌回、梭回等与奖赏机制相关的脑区; 而不同类型的药物相关线索之间的比较则显示, 用药工具和用药动作线索更多激活了双侧颞中回、双侧顶下小叶、左侧顶上小叶和右侧额下回等感觉-运动脑区。用药动作线索比单纯药物和用药工具线索, 激活了更为广泛的动作脑区。由此, 我们认为药物相关线索导致成瘾者大脑中奖赏和感觉-动作两套系统被激活, 包含用药工具、用药动作在内的相关线索会激活更多的感觉-运动脑区。