大中学生对悲伤与愉快面孔区分的特征比较

采用面孔识别研究范式和事件相关电位方法,研究初中生、高中生和大学生三个年龄段被试情绪面孔加工特征。研究发现,在刺激呈现后的550~800ms,三个年龄段被试均产生悲伤效应,悲伤面孔引发的LPC波幅大于愉快面孔引发的LPC波幅,三个年龄段的悲伤效应脑区分布大致相同,表明三个年龄段情绪面孔加工有着类似的神经机制。进一步比较三个年龄段悲伤面孔引发的ERPs发现,在刺激呈现后的200~550ms,悲伤面孔的加工产生年龄效应。年龄段越低的被试N2波幅越大,年龄段越高的被试P3波幅越大。这一结果提示,随着年龄的增长,青少年大脑高级功能的发育日趋成熟。     

PTSD symptom trajectories: from early to chronic response

This study aimed to identify posttraumatic stress disorder (PTSD) symptom trajectories across the first 12 months following traumatic injury. Three hundred and seven consecutively admitted injury survivors were assessed for severity of PTSD symptoms just prior to discharge, and at 3 and 12 months postinjury. Growth modeling was used to determine the curve that best fit the trajectory for each symptom cluster over the 12-month period. Individuals with 12-month PTSD showed significantly higher re-experiencing, arousal, and avoidance symptoms at eight days posttrauma relative to those without, and these symptoms escalated over time. Those without PTSD maintained their relatively low symptom levels. These findings highlight that individuals who will go onto develop PTSD have a distinctly different symptom course than those who recover.     

Should scientists think? Comment on Machado and Silva (2007)

The author has previously claimed that neural activity in a medial frontal brain area represents conscious motor intentions. A. Machado and F. J. Silva attempted to challenge this claim by arguing that such intentions are not necessarily causally effective and must be caused by something else, so that they therefore cannot be the unmoved first movers in action. The author's reply is that he made no such claims about the causal status and origin of conscious intentions. In fact, he has elsewhere presented empirical evidence in support of the idea that intentions are not necessarily causal. But this does not stop researchers from studying the neural basis for the conscious impression that one intends and wills one's actions. One can feel and attend to such intentions, be they causal or not. The author's claim is that there is neural activity in the medial frontal wall that reflects such conscious feelings. Other recent empirical evidence that supports this view is described.     

Genetic and environmental influences on interpersonal cognitions and associations with depressive symptoms in 8-year-old twins

Less is known about depression in children than in adults. This study integrates fields by combining cognitive and interpersonal research investigating childhood depression symptoms through the use of a genetic framework. Three research questions are addressed. First, what are the associations among interpersonal cognitions, anxiety, and depression? Second, what are the relative magnitudes of genetic and environmental influences on interpersonal cognitions? Third, to what extent do genetic and environmental influences explain associations between interpersonal cognitions and depression? Three hundred pairs of 8-year-old twins reported on symptoms of depression and anxiety by completing the Children's Depression Inventory and the Screen for Childhood Anxiety-Related Emotional Disorders. The authors examined interpersonal cognitions with the Children's Expectation of Social Behaviors and the Perceptions of Peers and Self Questionnaires. Interpersonal cognitions were more strongly correlated with depression (mean r = .35) than with anxiety (mean r = .13). Genetic influence on interpersonal cognitions was small (M = 3%), and associations between interpersonal cognitions and depression were mainly explained by environmental influences. These latter findings may result from interpersonal cognitions in young children, reflecting life experiences as opposed to trait-like cognitive biases.     

Predicting emotional reactions after being harmed by another

Being harmed by others is a frequent and disturbing experience in normal social life, resulting in the arousal of two emotional complexes, anger and worry. The present research developed a model to predict these two dimensions of emotional response to being harmed. It was argued that in addition to being driven by judgments of blame, anger is also enhanced by assessments that one's social face has been damaged. The victim's judgment of this face loss also contributes to feelings of worry, as one's social credibility has been compromised in the eyes of others by being harmed. Worry is further augmented by the victim's concern about the damage done to his or her relationship with the perpetrator by the harm-doing. As hypothesized, both perceived image loss and blame judgments were found to predict the emotional complex of anger, while image loss and the perceived harm to the relationship predicted the emotional complex of worry. This research supplemented the well-researched Western construct of blame in response to harm by incorporating the more salient collectivist concerns of image loss and relationship damage, pushing our models of social processes to be more comprehensive and ultimately universal in their scope.     

Achieving relationship harmony in groups and its consequence for group performance

Relationships are formed to meet individual goals, and one consequence of this joint effort towards mutual goal fulfillment will be a level of relationship harmony achieved between the interaction partners. The present study investigated the personality correlates associated with the achievement of relationship harmony in a group setting and its consequences for group performance. Students from a social psychology course formed groups for completing task assignments. After a 3-month collaboration, each student evaluated his or her level of relationship harmony attained with each of his or her other group members. It was found that a member's agreeableness positively predicted his or her achievement of relationship harmony in the group, but that conscientiousness and openness to experience had detrimental effects on the relationship harmony achieved with other group members. A group whose members attained higher relationship harmony performed better on its group assignments, suggesting that relationship harmony among members of a group might have beneficial effects on group processes like performance focus and shared exchange at least in a collectivist, Chinese culture.     

A virtual psychiatric ward for orientating patients admitted for the first time

Misconceptions about psychiatric wards frequently cause newly admitted mental patients to stay away from these wards despite their need for treatment. Although ward orientation is typically conducted by nurses in an attempt to help patients to adapt to the new environment, it is considered time-consuming, and the method of orientation and the explanations given may vary among different nurses. This situation calls for a more effective and standardized approach to orientating mental patients on their first admission. To this end, a computer-based interactive virtual environment was developed based on a real psychiatric ward by using virtual reality (VR) technologies. It enables the patient to navigate around to gain understanding about the ward through a virtual guided tour. The effectiveness of this VR orientation approach was investigated by a randomized controlled trial with consecutive sampling. Fifty-four Chinese participants were randomly assigned to undergo ward orientation by either using the VR-based approach or reading text-based electronic information sheets about the ward with a computer. Subjective and objective measures were obtained respectively using the Chinese version of the State-Trait Anxiety Inventory questionnaire and the heart-rate variability measurement before and after the intervention. In addition, a test on the level of understanding about the ward was administered at the end of the session. The results showed that the VR orientation approach is helpful in reducing patients' anxiety while also improving their level of understanding about the ward.