Control of responding during stimuli that precede transitions in reinforcement frequency

Pigeons' responses were reinforced on a variant of a mixed variable-interval extinction schedule of reinforcement in which the transition to the higher reinforcement rate was signaled by a trace stimulus projected on the response key prior to the onset of the component correlated with food delivery. In the first of two experiments, the duration of the trace stimulus preceding the component correlated with food delivery was varied from 1.5 to 50.0 s and in the second experiment, the reinforcement frequency in the same component was varied from 10 to 60 reinforcers per hour. Pigeons pecked at the trace stimulus preceding the onset of the component correlated with food delivery even though responding was not reinforced in its presence and only one of the changes in reinforcement rate (i.e., from extinction to reinforcement) was signaled. The rate of pecking during the trace stimulus was a function of its duration but not of the reinforcement frequency in the following component. Higher rates generally occurred at the shorter trace-stimulus durations. Component responding following the offset of the trace stimulus was under discriminative control of the trace stimulus whether or not responding occurred in the presence of the trace stimulus.     

Human–Computer Interaction in Face Matching

Automatic facial recognition is becoming increasingly ubiquitous in security contexts such as passport control. Currently, Automated Border Crossing (ABC) systems in the United Kingdom (UK) and the European Union (EU) require supervision from a human operator who validates correct identity judgments and overrules incorrect decisions. As the accuracy of this human–computer interaction remains unknown, this research investigated how human validation is impacted by a priori face‐matching decisions such as those made by automated face recognition software. Observers matched pairs of faces that were already labeled onscreen as depicting the same identity or two different identities. The majority of these labels provided information that was consistent with the stimuli presented, but some were also inconsistent or provided “unresolved” information. Across three experiments, accuracy consistently deteriorated on trials that were inconsistently labeled, indicating that observers’ face‐matching decisions are biased by external information such as that provided by ABCs.     

The effects of co‐occurring ADHD symptoms on electrophysiological correlates of cognitive control in young people with Tourette syndrome

Efficient cognitive control is implicated in tic control in young people with Tourette syndrome (TS). Attention‐deficit/hyperactivity disorder (ADHD) frequently co‐occurs with TS and is associated with impaired cognitive control. Young people with TS and ADHD (TS+ADHD) show poorer cognitive control performance than those with TS, but how co‐occurring ADHD affects underlying neural activity is unknown. We investigated this issue by examining behavioural and event‐related potential (ERP) correlates of cognitive control in young people with these conditions. Participants aged 9–17 with TS (n = 17), TS+ADHD (n = 17), ADHD (n = 11), and unaffected controls (n = 20) performed a visual Go/Nogo task during electroencephalography (EEG) recording. Behavioural performance measures (D‐prime, RT, reaction time variability, post‐error slowing) and ERP measures (N2, P3, error‐related negativity (ERN), error positivity (Pe)) were analysed in a 2 (TS‐yes, TS‐no) × 2 (ADHD‐yes, ADHD‐no) factorial analysis to investigate the effects of TS, ADHD, and their interaction. The results of these analyses showed that ADHD was associated with poorer performance and reduced amplitude of all ERPs, reflecting widespread cognitive control impairments. Tourette syndrome was associated with slowed RTs, which might reflect a compensatory slowing of motor output to facilitate tic control. There was no interaction between the TS and ADHD factors for any behavioural or ERP measure, indicating the impairing effects of ADHD on behaviour and electrophysiological markers of cognitive control were present in TS+ADHD and that RT slowing associated with TS was unaffected by co‐occurring ADHD symptoms.     

基于系统动力学的群体情绪传播模型

选取某高校20个教学班级共计614人为被试,采用心理学实证与系统动力学（system of dynamic）与社会网络（social network）建模相结合的研究方法,对群体情绪传播的动力学规律进行了建模,并将模型仿真结果与心理实验结果进行了比对。结果表明,所建立的模型能够较好地刻画出群体情绪传播的动力学规律,具有较高的生态效度。该模型的建立对群体性事件的定量预警与监控提供了基础理论依据。     

父母心理控制与小学生的欺负行为:敌意归因和冷酷无情的作用检验

采用班级整群抽样法选取1847名3~6年级小学生（男生987名;平均年龄10.73±1.16岁）及其家长为被试,采用问卷法考察父母心理控制与小学生欺负行为的关系,同时探讨敌意归因和冷酷无情的中介作用。结果发现：（1）父母心理控制显著正向预测小学生的欺负行为;（2）冷酷无情在父母心理控制与小学生欺负行为间的关系中存在中介作用,敌意归因不发挥中介作用;（3）父母心理控制对小学生欺负行为影响的中介机制不存在显著的性别差异和学段差异。本研究结果表明,冷酷无情是父母心理控制影响小学生欺负行为的重要机制,但敌意归因不是。研究者和实践者应注重对欺负者情感加工能力的关注和干预。     

Adaptation in Visuomanual Tracking Depends on Intact Proprioception

The role of arm proprioception in motor learning was investigated in experiments in which, by moving the arm, subjects followed the motion of a target displayed on a monitor screen. Adaptive capabilities were tested in visuomanual tracking tasks following alterations in the relationship between the observer's actual arm movement and visual feedback of the arm movement given by a cursor motion on the screen. Tracking performance and adaptive changes, measured in terms of spatiotemporal error, tracking trajectory curvature, and spatial gain, were compared in 7 control subjects (CSs) and in 1 deafferented subject (DS). CSs adapted appropriately to altered visuomanual relationships; those changes were present in trials immediately after restoration of normal scaling. In contrast, although the DS modified his tracking strategy from trial to trial according to the altered conditions, he did not show plastic changes in internal visuomanual scaling. Like the results of prismatic adaptation experiments, the present results suggest that arm proprioception contributes to the plastic changes that follow alterations in the scaling of visuomanual gain.     

Posttraumatic Stress Disorder and Emotion‐Focused Coping Among Disaster Mental Health Counselors

The authors surveyed 235 disaster mental health counselors (DMHCs) for levels of posttraumatic stress disorder (PTSD) symptom severity. A correlational design was used to examine the roles of adult attachment security, emotion regulation, and mindfulness in predicting PTSD symptoms among this group. Each of the 3 predictors was negatively correlated with PTSD symptom severity, and data supported a mediating role for emotion regulation. Results may inform DMHCs, other counselors, and individuals who train or deploy DMHCs.     

心理虐待对儿童认知情绪调节策略的影响：人格特质的中介作用

采用儿童认知情绪调节问卷、儿童版艾森克人格问卷、儿童心理虐待量表对405名8～12岁儿童进行研究,考察人格特质在心理虐待对认知情绪调节策略关系中的中介作用。结果发现：(1)儿童心理虐待与不适应性认知情绪调节策略呈显著正相关;儿童神经质与不适应性认知情绪调节策略呈显著正相关儿童内外倾与适应性认知情绪调节策略呈显著正相关(2)儿童神经质在心理虐待与儿童不适应性认知情绪调节策略关系间起到完全中介作用（3）该中介模型具有性别和年龄的测量等值性。研究结果显示,儿童心理虐待可以通过神经质的中介作用影响不适应性认知情绪调节策略。     

未意识到错误影响错误后调整的电生理证据

现有研究一致认为意识到错误可引起错误后调整,但是未意识到错误能否促使个体进行错误后调整尚存争议。本实验采用基于go/no-go范式的错误意识任务考察上述问题,并根据被试对自己按键反应正误主观报告将no-go错误反应分为意识到错误和未意识到错误。行为结果发现,意识到错误和未意识到错误后正确率均显著高于正确击中试次(正确go试次)后正确率;但是,意识到错误后试次反应时显著快于正确击中后反应时,未意识到错误后反应时显著慢于正确击中后反应时。该结果表明两类错误均优化了错误后行为表现,但是意识到错误后被试调整速度加快,未意识到错误后被试调整速度减慢。进而,时频分析发现意识到错误相较于未意识到错误诱发显著更强的alpha波能量。并且,前者在错误意识主观报告前已诱发alpha波,后者在错误意识主观报告反应后诱发alpha波。该结果表明意识到错误一直处于持续的注意监控中,而未意识到错误是任务引起的暂时注意控制。因此,本实验说明错误意识影响错误后调整,意识到错误可能采用类似主动性控制的策略调节错误后行为,而未意识到错误可能采用类似反应性控制的策略调节错误后行为。     

任务无关情绪刺激对工作记忆信息更新的影响:来自ERP的证据

任务无关的情绪刺激如何对工作记忆的信息更新过程产生影响还不清楚。本研究采用情绪N-back任务,结合事件相关电位技术调查情绪对工作记忆信息更新的影响。ERP结果显示,在0-back任务中,负性分心物诱发的P3显著小于中性分心物,表明其干扰了工作记忆信息更新过程;而在2-back任务中,负性分心物诱发的P3与中性分心物没有显著差异,表明其未对信息更新表现出干扰效应。该结果支持了情绪与认知加工的双竞争模型。