民办高校大一新生心理健康状况调查

采用症状自评量表对民办高校8111名大一新生进行问卷调查。结果表明,民办高校的大一新生在强迫、恐怖、精神病性三个因子上的得分显著高于全国常模,在躯体化、人际关系、敌对、抑郁、偏执五个因子上的得分显著低于全国常模;女生在各个因子上的得分均显著高于男生;本科生的心理健康水平低于总体学生的平均水平。     

彼彻姆和查瑞斯的原则主义进路及其改进

在全球化、多元化背景下,彼彻姆和查瑞斯通过寻找普世原则来容纳道德多元主义和避免道德相对主义,进而为医学伦理学提供一系列清晰、明确、有效的道德规范的努力无疑是可贵的,但其原则主义存在的突出问题是反思平衡方法在实践中不能有效解决根本性的道德冲突。针对这一不足,我们尝试提出解决道德冲突的更有希望的思路。     

复合刺激潜意识知觉的属性分离

通过四种复合刺激的属性分离实验,检验刺激不同属性在潜意识知觉中的差异。结果表明,刺激的不同属性在刺激材料潜意识知觉中具有不同的作用。验证了潜意识知觉心理加工的部分优先理论。检验了基于控制迫选任务中比较刺激所建立的复合刺激潜意识知觉属性分离模型的有效性。     

客体特征统计属性表征机制的特异性

通过两个实验就视觉系统能否像计算平均数那样高效地计算其他统计量的问题进行了探讨。实验—保持—组圆的平均大小不变而改变众数,考察平均数估计是否受众数变化的影响;实验二采用与实验一相同的刺激,直接考察被试估计众数的绩效。结果发现：（1）对平均数的估计不受总体众数变化的影响;（2）对众数的估计往往不如对平均数的估计准确,估计值受平均数变化的影响;（3）在估计众数的任务中,被试成绩受总体极大值的影响。上述结果表明,视觉系统不存在针对众数的自动化加工机制。根据本实验的结果可以进一步推测,视觉系统并非对所有统计量都可做高效加工,而可能存在针对平均数的特异加工机制。     

为什么贫困会削弱决策能力？三种心理学解释

贫困削弱决策能力的心理学解释有三种基本视角: 注意力损耗论认为个体的注意力易集中于资源匮乏的领域而忽略其他, 意志力损耗论认为抵制外在诱惑会消耗其意志力, 认知控制损耗论认为贫困者的经济决策在难度上高于其他决策。这三种有限心理资源的损耗会削弱贫困者的认知表现而诱发非理性决策。后续研究应注意澄清三大机制之间的区别, 分析贫困损耗认知的结果是否具有可逆性, 同时就已有结果的跨文化适用性做出验证。     

Group‐level effects of forgiveness: Group cohesiveness and collective action in social dilemmas

Forgiveness research has predominately focused on individual/relational outcomes such as well‐being and closeness. Less research has examined group outcomes such as cohesiveness or collective action. Forgiveness studies have also emphasized the victim's or transgressor's perspective, neglecting the effects of forgiveness on ingroup members who have neither given nor received forgiveness. We theorize that forgiveness promotes collective action among ingroup members through group cohesiveness and that transgressors' apologetic reactions impact this process. In a laboratory experiment, 229 students (175 females) were led to believe they were in a social dilemma with three others. Some participants witnessed group members forgive an apologetic, obstinate, or neutral defector, whereas others witnessed an unforgiving response. Forgiveness of apologetic and neutral defectors increased later cooperation among ingroup members. This effect was generally mediated by group cohesiveness. Our findings suggest that forgiveness can impact cooperation on a group level, providing a path to successful resolutions to collective action problems. Copyright © 2014 John Wiley & Sons, Ltd.     

Hippocampal CA1 kindling but not long-term potentiation disrupts spatial memory performance

Long-term synaptic enhancement in the hippocampus has been suggested to cause deficits in spatial performance. Synaptic enhancement has been reported after hippocampal kindling that induced repeated electrographic seizures or afterdischarges (ADs) and after long-term potentiation (LTP) defined as synaptic enhancement without ADs. We studied whether repeated stimulations that gave LTP or ADs resulted in spatial performance deficits on the radial arm maze (RAM) and investigated the minimal number of ADs required for such deficits. Three experimental groups were run as follows: (1) 5 hippocampal ADs in 1 d (5-AD group), (2) 10 hippocampal ADs in 2 d (10-AD group), and (3) 12 -frequency primed-burst stimulations (PBSs) in 2 d in order to induce LTP without ADs (LTP group). Each experimental group was run together with a control group during the same time period. Rats were first trained in a spatial task on a radial arm maze with four of the eight arms baited, then given control or experimental treatment, and maze performance was tested in the first week (1-4 d) and fourth week (22-25 d) after treatment. Basal dendritic population excitatory postsynaptic potentials (pEPSPs) and medial perforant path (MPP)-evoked dentate gyrus population spike and polysynaptic CA1 excitation were recorded before and after experimental and control treatment. Spatial memory errors, in particular reference memory errors, were significantly higher in the 10-AD kindled group than any other group on the first and fourth week after treatment. Spatial memory errors were not significantly different in the 5-AD and LTP groups as compared with any control groups at any time. Basal dendritic pEPSP in CA1 was enhanced for about 1 wk after 12 PBSs, 10 ADs, or 5 ADs, while the dentate gyrus population spike and CA1 polysynaptic excitation evoked by MPP was increased for up to 4 wk after 10 ADs, but not 12 PBSs. Thus, distributed alteration of multiple synaptic transmission in the entorhinal-hippocampal circuit, but not LTP at the basal dendritic synapses in CA1, may disrupt spatial performance after 10 hippocampal ADs.     

Black, Hispanic, and White American mothers of adolescents: construction of a national standard

Black, Hispanic, and White American mothers (n = 739) and adolescents (n = 806) completed the Parent Success Indicator to rate maternal performance on subscales of Communication, Use of Time, Teaching, Frustration, Satisfaction, and Information Needs. A weighted method corresponding to ethnic proportions in the American population was applied to construct a national standard for comparative reference. In general, both generations perceived mother performance as favorable. Teaching received the highest rating followed by Satisfaction levels. Mothers felt that Information Needs were their greatest limitation while adolescents reported that their mothers were prone to frustration. The amount of time mothers and adolescents spent together was the most significant independent variable influencing parent performance. Other variables such as income and marital status had limited impact.     

Stimulated release of tissue plasminogen activator from artery wall sympathetic nerves: implications for stress-associated wall damage

Recurrent stress is clinically associated with early onset hypertension and coronary artery disease. A mechanism linking emotion to pathogenic remodeling of the artery wall has not been identified. Stress stimulates acute regulated release of tissue plasminogen activator (t-PA) into the circulation, which is presently attributed to the vascular endothelium. Sympathetic neurons also synthesize t-PA and axonally transport it to the arterial smooth muscle. Unlike release by the endothelium, a stress-stimulated sympathetic discharge would potentially accelerate degradation of the wall matrix by plasmin. To assess whether sympathetic axons are the principal source of acute stress-induced arterial release of t-PA, we compared the output from small densely innervated and large sparsely innervated isolated artery segments before and after sympathetic stimulation, and after ablations. Following phenylephrine infusion densely-innervated microvessels in uveal eyecups were released over 60-fold greater amounts of active t-PA per milligram than the sparsely innervated aorta; and ten-fold more than carotid artery segments. Mesenteric artery release was 4.8-fold greater than release by the carotid artery. In vivo, uveal release of t-PA increased more than three-fold within one minute following superior cervical sympathetic ganglion electrical stimulation, and after phenylephrine, or nicotine infusions of the anterior chamber. Circulating levels of t-PA fell 70% following chemical sympathectomy. We propose that sympathetic nerves are the primary source of stress-induced release of t-PA into and from the densely innervated resistance arteries and arterioles, where dysregulated plasmin-induced proteolysis could damage the wall matrix.     

Antipsychotic medication adherence, cocaine use, and recidivism among a parolee sample

This study examined the independent and interactive associations between cocaine use and antipsychotic medication adherence in predicting 12 month criminal recidivism among a sample of mentally ill parolees (N = 200). Consistent with prior research, cocaine use (based on hair assays) was associated with more than a threefold increase (relative to non-cocaine users) in the likelihood of a parolee being returned to custody during the follow-up period. Although medication adherence (based on urine specimens) was not independently associated with a significant reduction in recidivism risk, the interaction between cocaine use and medication adherence was significant, revealing a disproportionate impact of medication adherence specific to cocaine users. Prediction models of recidivism based on self-reported measures of medication adherence and cocaine use revealed only marginally significant trends for cocaine use, no effect for adherence, and no significant interaction between these two predictors.