Persistent operational synchrony within brain default-mode network and self-processing operations in healthy subjects

Based on the theoretical analysis of self-consciousness concepts, we hypothesized that the spatio-temporal pattern of functional connectivity within the default-mode network (DMN) should persist unchanged across a variety of different cognitive tasks or acts, thus being task-unrelated. This supposition is in contrast with current understanding that DMN activated when the subjects are resting and deactivated during any attention-demanding cognitive tasks. To test our proposal, we used, in retrospect, the results from our two early studies (Fingelkurts, 1998; Fingelkurts et al., 2003). In both studies for the majority of experimental trails we indeed found a constellation of operationally synchronized cortical areas (indexed as DMN) that was persistent across all studied experimental conditions in all subjects. Furthermore, we found three major elements comprising this DMN: two symmetrical occipito-parieto-temporal and one frontal spatio-temporal patterns. This new data directly supports the notion that DMN has a specific functional connotation - it provides neurophysiologic basis for self-processing operations, namely first-person perspective taking and an experience of agency.     

Conversing while driving: The importance of visual information for conversation modulation

Multiple studies have shown an increased accident risk due to telephoning while driving. On the other hand, driving with passengers leads to a decreased accident risk. One explanation is a conversation modulation by passengers in cars which leads to a different conversation pattern which is not so detrimental to driving as that when phoning. A driving simulator study was conducted in order to examine this conversation modulation more closely and to find out more about the factors involved in this modulation, especially about the role of visual information available to the passenger. In a within-subject design the conversational patterns of 33 drivers and passengers in different in-car settings (passenger as usual, passenger without front view or passenger without view of the driver) were compared to a hands-free cell phone and to a hands-free cell phone with additional visual information either about the driving situation or the driver. Participants were instructed to have a naturalistic small-talk with a friend. Results of the drivers’ speaking behavior showed a reduction of speaking while driving. Compared to a conversation partner on the cell phone, a passenger in the car varies his speaking rhythm by speaking more often but shorter. Further analyses showed that this effect is also found with a cell phone when providing the conversation partner additional visual information either about the driving situation or the driver. This latter finding supports the idea that conversation modulation is not triggered by being in the car but by the visual information about the driver’s state and the driving situation.     

多属性决策任务中焦虑型个体的信息加工特点研究

该研究以多属性职业选项为材料,采用计算机化的信息板技术初步考察了焦虑型个体在多属性决策过程中的信息加工特点,结果表明焦虑型个体与非焦虑个体的决策过程有所不同。主要表现在与非焦虑型的决策者相比,焦虑型的被试在决策过程中对职业属性的加工时间更长,加工的信息也更多;在决策前后他们对完成决策任务的信心水平评估都很低,但是在搜索模式上焦虑型的决策者与非焦虑型的决策者没有差别。在研究的讨论部分对焦虑型个体决策过程中信息加工特点的原因进行了分析。     

Few Gender Differences Exist Between Women and Men with Chronic Fatigue Syndrome

Chronic fatigue syndrome (CFS) is generally considered to be a women's health issue, but the illness occurs also in men. The research objective of this study was to determine if illness patterns and functional status differed between the sexes. Because our own data showed that women with CFS have significantly more comorbid fibromyalgia or multiple chemical sensitivity than men, we eliminated patients with these comorbid conditions from our evaluation. Women with CFS were quite similar to men with CFS in terms of demographics, psychiatric status, functional status, and assessments of disability. Women reported more infectious/flu-like symptoms (represented by a factor derived from factor analysis) than men, but these differences were insignificant after controlling for other variables. Cluster analysis revealed that women were more likely than men to fall in the cluster characterized by symptom severity. Differences found were those of degree rather than of type; strikingly different illness patterns—suggestive of different pathophysiological processes between the sexes—were not found.     

Bimanual Finger Tapping: Effects of Frequency and Auditory Information on Timing Consistency and Coordination

The authors' goal in this study was to probe the basis for an earlier, unexpected finding that preferred-frequency finger tapping tends to have higher frequencies and to be less stable for in-phase than for antiphase tasks. In follow-up experiments, 3 protocols were employed: a preferred-frequency replication in both coordination modes, a metronome-driven matching of the preferred frequencies to each of the coordination modes, and a frequency scaling of both modes. The original findings were affirmed for preferred frequency. Tapping to a metronome had a differential effect on in-phase and antiphase: A more stable coupling across frequencies was exhibited during in-phase. Under frequency scaling, the antiphase pattern decomposed at lower frequencies than did in-phase, but no phase transitions were observed. The loss of stable coordination in both modes was attended by sudden increases in frequency differences between fingers and by phase wandering. The emergence of those effects is discussed in light of asymmetric modifications to the Haken-Kelso-Bunz model (H. Haken, J. A. S. Kelso, & H. Bunz, 1985) and the task constraints of tapping.     

11-15岁学生性格发展模式的研究

本研究以776名11-15岁汉族与白族中小学生为被试,研究了学生性格发展的年龄模式.结果表明,年龄因素对学生性格发展的影响显著,在被测量的24种性格特质中,有18种特质在性质上表现为随年龄的增长而逐步提高的趋势,但是在13岁组发现特质发展的低谷.