Processing Speed Weakness in Children and Adolescents with Non-Hyperactive but Inattentive ADHD (ADD)

DSM-IV-TR defines ADHD-Predominantly Inattentive as allowing up to five symptoms of hyperactivity/impulsivity, while theories of the inattentive type usually assume a group that is hypoactive and characterized by processing speed and cognitive interference deficits. In a community-recruited sample of 572 children and adolescents, a pure inattentive subtype of ADHD (ADD) was defined as those who met DSM-IV-TR criteria for ADHD-PI but had two or fewer hyperactive/impulsive symptoms. Processing and output speeds of those with ADD were compared to those identified with DSM-IV-TR ADHD combined type and non-ADHD controls. These results were then contrasted with those found when DSM-IV-TR defined ADHD-PI was compared with ADHD-C and controls. Processing and output speed were assessed with the Trailmaking A and B and the Stroop Naming Tests. Cognitive interference control was assessed with the interference score from the Stroop Task. Slower cognitive interference speed was found in the ADD vs. ADHD-C and controls comparisons, but not the ADHD-PI versus ADHD-C and controls comparisons. On output speed measures, ADD exhibited the slowest performance, significantly different from controls and the effect size for the set-shifting speed contrast (Trailmaking B) was double that of the ADHD-PI vs. control comparison. ADHD-Inattentive type as defined by the DSM-IV-TR is a heterogeneous condition with a meaningful proportion of those affected exhibiting virtually no hyperactive/impulsive symptoms. This subgroup may represent a distinct inattentive condition characterized by poor cognitive interference control and slow processing or output speed.     

Adjustment to War Captivity: The Role of Sociodemographic Background,Trauma Severity,and Immediate Responses,in the Long-Term Mental Health of Israeli Ex-Pows

This study assessed the role of sociodemographic features, pre-captivity combat exposure, captivity severity, emotional responses and coping during captivity, and social support at homecoming, to the short- and long-term mental health of 164 Israeli POWs of the 1973 Yom Kippur War. The major contributors to the POWs' mental health were psychological responses during captivity, followed first by their education and ethnic status, and then by severity of captivity. Both traumatic stress of captivity and the results of the study were discussed in the light of Conservation of Resources (COR) theory.     

Response Facilitation and Inhibition in Manual,Vocal, and Oculomotor Performance: Evidence for a Modality-Unspecific Mechanism

In 2 experiments (N = 10, Experiment 1; N = 16, Experiment 2), the authors investigated whether evidence for response facilitation and subsequent inhibition elicited by masked prime stimuli can be observed for output modalities other than manual responding. Masked primes were followed by target stimuli that required a 2-choice manual, saccadic, or vocal response. Performance was measured for compatible trials in which primes and targets were identical and for incompatible trials in which they were mapped to opposite responses. When primes were presented centrally, performance benefits were obtained for incompatible trials; whereas for peripherally presented primes, performance benefits were found in compatible trials. That pattern of results was obtained for manual responses and for saccadic eye movements (Experiment 1), demonstrating that those effects are not mediated by specialized dorsal pathways involved in visuomanual control. An analogous pattern of effects was found when manual and vocal responses were compared (Experiment 2). Because vocal responding is controlled by the inferotemporal cortex, that result shows that prime-target compatibility effects are not primarily mediated by the dorsal stream, but appear to reflect modality-unspecific visuomotor links that allow rapid activation of motor responses that may later be subject to inhibition.     

神经科学视角下的共情研究热点

共情是指个体对他人情绪和想法的感受及理解。近年来关于共情神经机制的研究日益增多,但多集中在情感共情、认知共情、生理性疼痛共情等方面,而对社会痛共情、积极共情和不对称共情反应的研究相对较少。且由于研究范式及个体差异等原因,研究结果之间也充满着争议。未来研究可以设计更具生态效度的共情研究范式、进一步深化和细化共情的神经机制研究、从神经机制角度探讨不同共情能力个体的特点及共情反应的调节因素。     

短期习得的语言范畴使成人大脑右半球颜色范畴知觉转为左半球颜色范畴知觉

本研究探讨了色词与颜色重组训练能否让被试习得与真实情境相似的色词与颜色范畴联结, 并引起相应的偏侧化颜色范畴知觉, 从而进一步揭示语言编码对颜色范畴知觉的影响。采用六种蓝色作为材料。B1与B2为先前研究的两种蓝色。B11和B12, B21和B22分别为使B1, B2变浅和变深所得, 四者是连续的蓝色。训练被试分别用“duān”和“kěn”命名B1和B2。由于被试可能习得色词与颜色范畴的联结, 因此B12与B21为可能变范畴间颜色, B11和B12, B21和B22为可能变范畴内颜色。训练前后分别让被试完成一个视觉搜索测验。结果发现：前测中可能变范畴间颜色的辨别优于可能变范畴内颜色, 且在左视野呈现时更显著; 后测中可能变范畴间颜色的辨别同样优于可能变范畴内颜色, 但在右视野呈现时更显著。这提示：(1)人们在知觉同一语言范畴的不同颜色时可能会区分深浅范畴, 并因此引发右半球颜色范畴知觉; (2)短期习得的语言范畴能引起偏左半球颜色范畴知觉, 且使右半球颜色范畴知觉转为左半球颜色范畴知觉; (3)被试在训练中习得了色词与颜色范畴的联结; (4)范畴学习可以在仅学习一个样例的条件下自动发生。     

红色和蓝色对中国汉族大学生情绪的启动效应

通过3个实验探讨红色和蓝色对中国汉族大学生的情绪意义。实验1采用限制联想法考察红色和蓝色的情绪意义。实验2、实验3采用启动范式, 分别考察在知觉水平和概念水平上红色和蓝色对情绪的启动效应。结果发现：(1)知觉水平：在唤醒度和优势度上, 红色知觉引发了高唤醒、高优势情绪, 蓝色知觉引发了低唤醒、低优势情绪, 这与国外研究基本一致; 但在愉悦度上, 红色知觉既能引发高愉悦情绪, 也能引发低愉悦情绪, 而蓝色知觉只引发了高愉悦情绪, 这体现出本土化特点。(2)概念水平：在唤醒度和愉悦度上, 红色概念引发了高唤醒、高优势情绪, 蓝色概念引发了低唤醒、低优势情绪, 这与知觉水平基本一致; 但在愉悦度上, 红色概念只启动了高愉悦情绪, 而蓝色概念同时启动了高愉悦和低愉悦的情绪, 这与知觉水平不一致。本研究表明：(1)红色和蓝色对中国汉族大学生情绪引发的特点主要表现在愉悦度上; (2)颜色知觉和颜色概念对情绪的引发机制可能具有如下特点：颜色知觉对情绪的三维度具有直接的引发作用; 而颜色概念对情绪唤醒度和优势度的引发是以颜色知觉为中介, 对愉悦度的引发则是以社会文化为原因。本研究探讨了红色和蓝色对中国汉族大学生情绪的作用, 对红色和蓝色在中国社会环境中的应用具有一定的实际价值; 同时, 直接比较并剖析了颜色知觉与概念对情绪的引发特点, 对于揭示二者对情绪引发的内部机制具有一定的理论意义。     

Evaluating models of recognition memory using first- and second-choice responses

Swets, Tanner Jr., and Birdsall (1961) proposed a 4-alternative forced-choice task with two choices (4AFC-2R) for distinguishing between the Equal-Variance Signal Detection model and the One-High Threshold model. This task was recently implemented in the field of recognition memory (Parks & Yonelinas, 2009), a field in which several candidate models have been proposed. One advantage of the 4AFC-2R task is that it permits parameter estimation and goodness of fit testing, something which so far was only possible through the use of Receiver Operating Characteristic (ROC) functions for the more complex candidate models. The present article provides a thorough characterization and comparison of the main recognition memory models in the context of this task. Results are illustrated by a reanalysis of Parks and Yonelinas’ original data, revealing a preference for hybrid approaches to recognition memory, more specifically for the dual-process model (Yonelinas, 1997), whereas pure signal detection models performed poorly. The present analysis provides an assessment of the merits and limitations of this task, highlighting future research applications.     

British men's hair color preferences: an assessment of courtship solicitation and stimulus ratings

Two studies examined the influence of women's hair color on approach behavior by British men and on ratings of physical attractiveness and personality. In Study 1, a female confederate whose hair color was dyed blonde, brunette, or red was instructed to sit in several nightclubs. It was found that she was approached significantly more frequently by men in the blonde condition. In Study 2, images of the same confederate were rated by 126 men. Results showed that the brunette stimulus was rated as more physically attractive, intelligent, approachable, competent, and arrogant, whereas the blonde stimulus was rated as more needy. These results are discussed in relation to the literature on hair color and attractiveness, but also in terms of women's own perceptions of their hair color.     

Paradoxes of praise: Identity‐inconsistent praise results in praise‐inconsistent responses

In four experimental studies, we explored the effect of consistency between central group values and the content of group‐directed praise on group‐based esteem, group identification, and willingness to express attitudes and intentions (in)consistent with the content of praise. Study 1 used pre‐existing groups with clearly defined central values, Study 2 relied on individual differences in perceptions of central group values within the same social group, and Studies 3 and 4 manipulated the centrality of group values experimentally. The results demonstrated that identity‐inconsistent praise resulted in lower group‐based esteem (Studies 1–4), and reduced group identification (Study 4), as compared to identity‐consistent praise. In addition, in all studies, identity‐inconsistent praise led to stronger willingness to reaffirm (the ignored) central group characteristics than identity‐consistent praise. The results are consistent with extensions of the self‐verification approach to the collective self.     

Positive effects of low intensity recorded maternal voice on physiologic reactions in premature infants

ObjectiveTo evaluate the effect of low intensity recorded maternal voice on the physiologic reactions of healthy premature infants in the neonatal intensive care unit (NICU).MethodsPhysiologic responses of 20 healthy preterm infants in the NICU of Shariati Hospital, Tehran, were obtained during a 15 min intervention including three 5 min periods (no-sound control, audio recorded playback of mother’s voice, no-sound post-voice). The intervention was presented three times a day for three consecutive days. During each intervention, oxygen saturation (%, OSPR), heart rate (HR), and respiratory rate (RR) were recorded at 1 min intervals over the 15 min and then averaged over each 5 min period, resulting in 3 averages for each variable for each intervention.ResultsRepeated Measures Analysis of Variance were employed to examine each variable separately. Over the three days, comparison of oxygen saturation over each of the three periods (before, during voice, after) revealed an increase in oxygen saturation during the voice period, compared to the pre-voice period, which persisted over the post-voice period; there were no differences between the voice and post-voice periods. Analyses of the HR and RR data showed a decrease in both variables during the voice period compared to the pre-voice period which persisted over the post-voice period. Again, there were no differences between the voice and post-voice periods.ConclusionExposure to low intensity recorded maternal voice has positive effects on the preterm infants ‘physiologic responses.