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排序方式: 共有840条查询结果,搜索用时 46 毫秒
741.
How does bilingualism improve executive control? A comparison of active and reactive inhibition mechanisms 总被引:1,自引:0,他引:1
Colzato LS Bajo MT van den Wildenberg W Paolieri D Nieuwenhuis S La Heij W Hommel B 《Journal of experimental psychology. Learning, memory, and cognition》2008,34(2):302-312
It has been claimed that bilingualism enhances inhibitory control, but the available evidence is equivocal. The authors evaluated several possible versions of the inhibition hypothesis by comparing monolinguals and bilinguals with regard to stop signal performance, inhibition of return, and the attentional blink. These three phenomena, it can be argued, tap into different aspects of inhibition. Monolinguals and bilinguals did not differ in stop signal reaction time and thus were comparable in terms of active-inhibitory efficiency. However, bilinguals showed no facilitation from spatial cues, showed a strong inhibition of return effect, and exhibited a more pronounced attentional blink. These results suggest that bilinguals do not differ from monolinguals in terms of active inhibition but have acquired a better ability to maintain action goals and to use them to bias goal-related information. Under some circumstances, this ability may indirectly lead to more pronounced reactive inhibition of irrelevant information. 相似文献
742.
Borderline personality disorder (BPD) is characterized by severe disruption of interpersonal relationships, yet very little research has examined the relationship between maternal BPD and offspring psychosocial functioning. The present study examined 815 mothers and their 15-year-old children from a community-based sample to determine (1) if there is an association between mothers' BPD symptoms and the interpersonal functioning, attachment cognitions, and depressive symptoms of their offspring, and (2) if the association of maternal BPD and youth outcomes is independent of maternal and youth depression. Measures of youth psychosocial functioning included self, mother, interviewer rated, and teacher reports. Results indicated that there was a significant association between maternal BPD symptoms and youth outcomes, and that this association remained even after controlling for maternal lifetime history of major depression, maternal history of dysthymic disorder, and youth depressive symptoms. This study provides some of the first empirical evidence for a link between mother's BPD symptoms and youth psychosocial outcomes. 相似文献
743.
Over the past 30 years researchers have learned a great deal about the development of object processing in infancy. In contrast, little is understood about the neural mechanisms that underlie this capacity, in large part because there are few techniques available to measure brain functioning in human infants. The present research examined the extent to which near-infrared spectroscopy (NIRS), an optical imaging technique, could be used to assess the relation between object processing and brain functioning. Infants aged 6.5 months were presented with an occlusion event involving objects that differed on many feature dimensions (multi-featural change), differed on shape only (shape change) or color only (color change), or did not differ (control). NIRS data were collected in the occipital and inferior temporal cortex. In the occipital cortex, a significant increase in oxyhemoglobin (HbO(2)) was observed in response to all four events and these responses did not differ significantly from each other. In the inferior temporal cortex, a significant increase in HbO(2 )was observed in the multi-featural and the shape change condition but not in the control condition. An increase was also observed in the color change condition but this increase did not differ significantly from baseline nor did it differ significantly from the response obtained in the control condition. These data were discussed in terms of (a) what they suggest about the neural basis of feature processing in infants and (b) the viability of using NIRS to study brain-behavior relations in infants. 相似文献
744.
Brennan AR Dolinsky B Vu MA Stanley M Yeckel MF Arnsten AF 《Learning & memory (Cold Spring Harbor, N.Y.)》2008,15(3):93-96
Planning and directing thought and behavior require the working memory (WM) functions of prefrontal cortex. WM is compromised by stress, which activates phosphatidylinositol (PI)-mediated IP3-PKC intracellular signaling. PKC overactivation impairs WM operations and in vitro studies indicate that IP3 receptor (IP3R)-evoked calcium release results in SK channel-dependent hyperpolarization of prefrontal neurons. However, the effects of IP3R signaling on prefrontal function have not been investigated. The present findings demonstrate that blockade of IP3R or SK channels in the prefrontal cortex enhances WM performance in rats, suggesting that both arms of the PI cascade influence prefrontal cognitive function. 相似文献
745.
746.
747.
Weapons are used in approximately one quarter of all violent incidents and the majority of homicides in the US, and the UK. Despite their overwhelming contribution to violent harm, theories of weapon related behaviors are scarce, and little is known of their correlates. This paper reviews available theories of weapon related behavior and identifies a number of motivations for weapon carrying, such as self defense, victim coercion, causing harm and self presentation. Correlates of weapon carrying and weapon use such as age, gender, socioeconomic status, exposure to weapons and history of aggression are explored and a number of limitations to current research approaches are identified. The review concludes with a discussion of future directions for research. 相似文献
748.
Ursula Bellugi Anna Järvinen-Pasley Teresa F. Doyle Judy Reilly Allan L. Reiss Julie R. Korenberg 《Current directions in psychological science》2007,16(2):99-104
ABSTRACT— Williams syndrome (WS) is a rare genetic disorder characterized by intellectual impairment and a distinctive physical and neuropsychological profile. Relative to their level of intellectual functioning, individuals with WS exhibit strengths in language and face recognition, with deficits in visual-spatial cognition. A heightened appetitive drive toward social interaction is a strong behavioral feature. Relative to other neurodevelopmental disorders, WS has a clearly defined genetic basis, together with a consistent neurocognitive profile of strengths and deficits. Thus, this disorder offers unique opportunities for elucidating gene–brain–behavior relationships. We focus on manifestations of the unusual social profile in WS, by examining data within and across levels of cognition, brain, and molecular genetics. 相似文献
749.
Experiment 1 compared the cognitive processes involved in blame and forgiveness judgments under identical experimental conditions. Experiment 2 was a replication of Experiment 1 with 4 judgment scales: willingness to prosecute, willingness to avenge, resentment level, and willingness to make up. Participants were presented with 32 scenarios in which a doctor made a medical error. These situations contained 5 items: the degree of proximity with the doctor (e.g., a family doctor known since childhood), the degree of negligence, the severity of consequences, apologies or contrition, and cancellation of consequences. Functional cognitive analysis grouped judgments into 2 categories: blame-like judgments (blame, prosecution, and revenge) and forgiveness-like judgments (resentment, forgiveness, and reconciliation). Blame-like judgments were characterized by additive integration rules, with negligence followed by apologies as the 2 main cues. Forgiveness-like judgments were characterized by an interactive integration rule, with apologies followed by negligence as the 2 main cues. 相似文献
750.
Sigmon ST Pells JJ Schartel JG Hermann BA Edenfield TM LaMattina SM Boulard NE Whitcomb-Smith SR 《Behaviour research and therapy》2007,45(5):965-975
Stress, stress reactivity, and coping skill use were examined in individuals with seasonal depression, nonseasonal depression, and nondepressed controls. Although participants in the two depressed groups reported using more avoidance coping strategies than controls, only participants in the seasonal depressed group reported using more season-specific coping (i.e., light-related strategies) than participants in the nonseasonal depressed and control groups. Individuals in the seasonal depressed group also reporting using acceptance coping strategies less frequently than individuals in the control group. Only participants in the nonseasonal depressed group, however, exhibited greater psychophysiological arousal in reaction to a laboratory stressor (i.e., unsolvable anagram task) when compared to participants in the seasonal and nondepressed control groups. Participants in both depressed groups reported greater impact of negative life events during the past 6 months than did controls. Similarities and differences in the two types of depression may have implications for the conceptualization and treatment of seasonal depression. 相似文献