认知研究的新技术——一套图形标准化资料和计算机实验软件

本工作是建立一套适合我国特点并有利于开展跨文化研究的图形加工实验的技术资料。工作包括两部分:1.建立一套图形标准化常模。2.建立相应的图库及图一词实验计算机软件,其中包括识别、启动、同时匹配和Stroop四个实验程序。为保证实验的精度,程序编制中解决了图形的即时呈现、即时消失、刺激的随机呈现、反应时精度1毫秒等问题。     

Stimulus intensity and foreperiod effects in intersensory facilitation

Intersensory facilitation refers to the more rapid reaction time (RT) to a target in one modality and an accessory stimulus in a different modality compared to a RT to the target alone. Prior studies suggest two processes contribute to the phenomenon, termed the preparatory state and energy integration which refer to the action of accessory stimulation in providing forewarning and intensifying the reaction signal, respectively. Experiment I factorially varied foreperiod duration, light (target) intensity and tone (accessory) intensity in a discriminative RT task. The results were that foreperiod (preparatory state) and intensity (energy integration) effects were additive, implying that they affected separate processing stages. Accessory stimulus intensity affected false alarm rate on catch trials. This suggests that energy integration involves a form of response bias (increased likelihood of responding) and not facilitation (more rapid information processing). Experiment II indicated that comparable energy integration effects obtain with tone as target and light as accessory, as well as vice versa. The findings further indicated that RT to a bisensory pairing is more rapid when attention is directed to the more potent member of the pair.     

Enhanced Hippocampal CA1 LTP but Normal Spatial Learning in Inositol 1,4,5-trisphosphate 3-kinase(A)-Deficient Mice

To define the physiological role of IP₃3-kinase(A) in vivo, we have generated a mouse strain with a null mutation of the IP₃3-kinase(A) locus by gene targeting. Homozygous mutant mice were fully viable, fertile, apparently normal, and did not show any morphological anomaly in brain sections. In the mutant brain, the IP₄ level was significantly decreased whereas the IP₃ level did not change, demonstrating a major role of IP₃3-kinase(A) in the generation of IP₄. Nevertheless, no significant difference was detected in the hippocampal neuronal cells of the wild-type and the mutant mice in the kinetics of Ca²⁺ regulation after glutamate stimulation. Electrophysiological analyses carried out in hippocampal slices showed that the mutation significantly enhanced the LTP in the hippocampal CA1 region, but had no effect on the LTP in dentate gyrus (DG). No difference was noted, however, between the mutant and the wild-type mice in the Morris water maze task. Our results indicate that IP₃3-kinase(A) may play an important role in the regulation of LTP in hippocampal CA1 region through the generation of IP₄, but the enhanced LTP in the hippocampal CA1 does not affect spatial learning and memory.     

Long live Proust: the odour-cued autobiographical memory bump

The autobiographical memory bump is an increase in the frequency of reported autobiographical memories (AMs) from a particular age range, and has been reported by numerous investigators (for reviews, see Conway, M. A. & Rubin, D. C. (1993). The structure of autobiographical memory. In A. F. Collins, S. E. Gathercole, M. A. Conway & P. E. Morris, Theories of memory. Hove: Lawrence Erlbaum; Rubin, D. C., Rahhal, T. A. & Poon, L. W. (1998). Things learned in early adulthood are remembered best. Memory and Cognition, 26, 3-19) to occur in the second and third decades of life. Invariably, word labels have been used as AM cues but, given that a popular interpretation of the anecdotal 'Proust phenomenon' is that odours evoke AMs which are especially aged, we wondered if a different pattern in the AM bump might emerge if AMs were cued by odours rather than labels. Here we report an attempt to substantiate this aspect of the 'Proust phenomenon' by comparing the distributions of memories across the lifespan when cued by odour and label. Data showed that, in line with previous studies, the bump for label cues was found to peak between ages 11 and 25 years and was confirmed to be quadratic in form. In contrast, the odour-cued memory distribution peaked at 6-10 years and decreased linearly thereafter. In the earliest age interval, 6-10 years, the proportion of AMs retrieved in response to odour cues was significantly greater than that for the label cues. These results provide empirical support for the Proust phenomenon, and have more general implications for the structure and age distribution of stored AMs.     

Dog–human social relationship: representation of human face familiarity and emotions in the dog brain

Animal Cognition - This study investigated the behavioral and neural indices of detecting facial familiarity and facial emotions in human faces by dogs. Awake canine fMRI was used to evaluate...     

The Impact of Childhood Emotional Abuse on Adolescents’ Subjective Happiness: the Mediating Role of Emotional Intelligence

Subjective happiness has been considered a key indicator of adolescents’ healthy development. The present study aimed at identifying the impact of childhood emotional abuse on adolescents’ subjective happiness and the possible role of emotional intelligence as a mediating variable. Using convenience sampling, a cross-sectional survey was conducted with 9 secondary schools in Hong Kong, China. Participants included a total of 1710 grade 8 to grade 9 secondary school students. The mean age was 13.6, and 61.2% were boys. Measures included child abuse and trauma, emotional intelligence, and subjective happiness. The results showed that childhood emotional abuse in adolescents’ childhood is a significant risk factor for subjective happiness. Emotional intelligence has a partial mediation effect on the relationship between childhood emotional abuse and subjective happiness. It is noteworthy that parenting practices in childhood have a significant impact on children’s happiness even after a period of time. It is suggested that students’ emotional intelligence be enhanced to increase their subjective happiness. Although the conventional parenting style may be rooted in Chinese culture, a paradigm shift in parenting seems to be needed for Chinese parents. Efforts should be made to promote appropriate parenting methods and emotional intelligence in Chinese societies. Limitations of the study and recommendations for future research are also discussed.

     

The role of the psychosocial safety climate in coping with workplace bullying: A grounded theory and sequential tree analysis

Workplace bullying is a severe workplace stressor that affects both employees and organizations. Despite a wealth of research of the prevalence of workplace bullying and its correlates, little research has been done on the process of bullying. In a qualitative study, based on the grounded theory approach, we examine the role of psychosocial safety climate (PSC) in influencing employees’ coping strategies and ultimately the escalation of bullying. Interviews were conducted with 20 Malaysian workers from various organizational settings, who also completed a 12-item PSC scale. The analysis revealed that coping strategies took the form of a modified exit-voice-loyalty-neglect (EVLN) model, whereby acquiescence replaced loyalty in the matrix. In turn, five escalation patterns of bullying were identified, linked to the coping options used by employees. We found that employees tended to voice in high PSC contexts, which led to swift resolution of bullying. In low PSC contexts, employees tended to neglect or acquiesce before exiting the organization because the bullying remained unresolved, which was revealed in four different trajectories of escalation without resolution. These results emphasize the influence of the organizational climate for psychosocial safety in shaping the coping options available to bullied workers, and the likely success of these strategies.