A Sparse Latent Class Model for Cognitive Diagnosis

Psychometrika - Cognitive diagnostic models (CDMs) are latent variable models developed to infer latent skills, knowledge, or personalities that underlie responses to educational, psychological,...     

Gender Essentialism,Authoritarianism, Social Dominance Orientation,and Filial Piety as Predictors for Transprejudice in Chinese People

Sex Roles - Although research on prejudice against gender and sexual minorities has been increasing in recent years, little attention has been paid to predictors for transprejudice and its...     

信任以稀为贵?下属感知被信任如何以及何时导致反生产行为

感知被信任是信任相关研究中的重要组成部分, 近年来逐渐受到研究者们的重视。以往研究大多认为, 下属感知被上司信任对下属自身以及组织整体都会产生积极影响, 却忽视了其潜在的负面影响。基于自我评价理论, 本文采用实验研究(研究1、2)与多时间点、多源的实地问卷调查(研究3), 探讨了下属感知被信任的潜在黑暗面。研究结果表明：下属感知被信任会引发下属心理权利感, 进而增加其反生产行为, 下属感知到信任的稀缺性在这一过程中起调节作用。具体来说, 当下属感知到信任的稀缺性较高时, 下属感知被信任通过心理权利感影响其反生产行为的正向中介效应显著; 而当下属感知到信任的稀缺性较低时, 上述中介效应不显著。本研究发现了感知被信任的潜在负面影响, 并明确了其对反生产行为的作用机制与边界条件, 为感知被信任相关研究提供了更加全面、辩证的研究视角, 同时也扩展了心理权利感和反生产行为的相关研究。     

Power corrupts (or does it?): An examination of the boundary conditions of the antisocial effects of experienced power

One of the most common conclusions in the power literature is that when people feel powerful, they behave in selfish and antisocial ways. While this conclusion tends to permeate the literature, research also recognizes that there are factors that can mitigate the corrupting nature of power, and that the experience of power may also lead to more positive and prosocial outcomes. In this article, we review findings that illustrate how individual differences, the contexts in which people experience power, and their construal of power all help determine how powerful people will ultimately behave toward others. We then consider these findings in totality, and suggest that they may articulate a more complex conceptualization of power as it relates to social behaviors. Specifically, we suggest considering not only the amount of power one has but also focusing on the way individuals experience power may provide a way to reconcile the disparate findings in the social power literature. We argue that research should expand upon the possible dualistic nature of power, and how the existence of both positive and negative construals of power can influence behaviors.     

叶笃正院士坚持科学精神的一桩往事

今年年初,中国科学院院士叶笃正被授予我国国家最高科学技术奖。国内主流媒体纷纷报道了叶老的辉煌业绩和大家风范。这使我想起2000年才知道的叶老的一桩往事。为核实此事,我在当年7 月拜访了叶老。事情发生在1987年。当时,出生于1916年的叶老已从中国科学院副院长的职位上退了下来,但还担任着《中国科学》杂志主编的职务。     

Neighborhood, family, and subjective socioeconomic status: How do they relate to adolescent health?

This study investigated the role of neighborhood, family, and individual subjective socioeconomic status (SES) in predicting adolescent physical health and psychological characteristics. Three hundred fifteen adolescents completed assessments of blood pressure, cortisol, and body mass index (BMI). Results revealed that lower neighborhood SES was associated with higher BMI and lower basal cortisol levels and that these effects persisted after controlling for family SES. Both family SES and neighborhood SES predicted negative psychological characteristics and experiences such as hostility and discrimination. In contrast, only subjective SES predicted positive psychological characteristics. These findings suggest the importance of understanding influences at the individual, family, and neighborhood levels for optimally targeting interventions to reduce health disparities earlier in life.     

Hypoglycemia-induced suppression of luteinizing hormone (LH) secretion in intact female rhesus macaques: role of vasopressin and endogenous opioids

The first objective of this study was to determine whether insulin-induced hypoglycemia (IIH) inhibits LH secretion in unrestrained female macaques during the follicular phase of the menstrual cycle. There was a consistent inhibitory effect of hypoglycemia on LH secretion within 3 h in these females. This inhibition was likely an indirect effect since low glucose levels did not inhibit GnRH secretion from GT1-1 neurones in vitro. We next investigated whether administration of a vasopressin antagonist (AVPa) either alone, or with naloxone could reverse the IIH-induced inhibition of LH release. Females were studied in the follicular phase during 10 h periods with blood samples collected every 10 min. Experimental groups were IIH (n=6), IIH+AVPa (n=5) and IIH+AVPa+naloxone (n=4). The first 5 h of each study served as a control and hypoglycemia was then induced with insulin. The AVPa was given as a bolus (180 microg) just before the insulin and was followed by a continuous infusion (180 microg/h) for 5 h. Naloxone (5 mg/kg) was given with the AVPa and followed by a continuous infusion (5 mg/kg/h) for 5 h. In the IIH group, LH reached its lowest value 3-4 h after insulin. Neither AVPa nor AVPa+naloxone infusion reversed the inhibitory action of hypoglycemia on LH release. These data suggest that if there are inhibitory actions of vasopressin and endogenous opioids on GnRH release induced by hypoglycemia, they are not sufficient to explain the suppression of GnRH/LH release in intact female primates.     

Patients with generalized social phobia direct their attention away from faces

The experiment tested whether patients with social phobia direct their attention to or away from faces with a range of emotional expressions. A modified dot probe paradigm (J. Abnorm. Psychol. 95 (1986) 15) measured whether participants attended more to faces or to household objects. Twenty patients with social phobia were faster in identifying the probe when it occurred in the location of the household objects, regardless of whether the facial expressions were positive, neutral, or negative. In contrast, controls did not exhibit an attentional preference. The results are in line with recent theories of social phobia that emphasize the role of reduced processing of external social cues in maintaining social anxiety.     

Ablation of cerebellar nuclei prevents H-reflex down-conditioning in rats

While studies of cerebellar involvement in learning and memory have described plasticity within the cerebellum, its role in acquisition of plasticity elsewhere in the CNS is largely unexplored. This study set out to determine whether the cerebellum is needed for acquisition of the spinal cord plasticity that underlies operantly conditioned decrease in the H-reflex, the electrical analog of the spinal stretch reflex. Rats in which the cerebellar output nuclei dentate and interpositus (DIN) had been ablated were exposed for 50 d to the H-reflex down-conditioning protocol. DIN ablation, which in itself had no significant long-term effect on H-reflex size, entirely prevented acquisition of a smaller H-reflex. Since previous studies show that corticospinal tract (CST) transection also prevents down-conditioning while transection of the rubrospinal tract and other major descending tracts does not, this result implies that DIN output that affects cortex is essential for generation of the CST activity that induces the spinal cord plasticity, which is, in turn, directly responsible for the smaller H-reflex. The result extends the role of the cerebellum in learning and memory to include participation in induction of plasticity elsewhere in the CNS, specifically in the spinal cord. The cerebellum might simply support processes in sensorimotor cortex or elsewhere that change the spinal cord, or the cerebellum itself might undergo plasticity similar to that occurring with vestibulo-ocular reflex (VOR) or eyeblink conditioning.     

Modifying Children's Gender-Typed Musical Instrument Preferences: The Effects of Gender and Age

Previous research has indicated that children display gender-typed musical instrument preferences. Two studies were conducted to determine (a) whether these preferences can be modified by presenting counter-examples (i.e., instruments played by gender-inappropriate musicians) and (b) whether child gender or age (kindergarten vs. 4th grade) influences the efficacy of such interventions. A videotape presentation format was employed in Study 1 and drawings in Study 2. Children exposed to counter-examples were less stereotyped than those who saw the instruments without musicians (Study 1) or with gender-appropriate musicians (Studies 1 & 2). Age did not influence children's responsiveness to the counter-examples, but boys were more resistant to the intervention than girls. There was some evidence that the counter-examples were effective not simply because children were attracted to same-sex musicians. Instead, children's instrument choices also appeared to be motivated by a desire to avoid behaving like musicians of the other-sex. Potential strategies for increasing children's responsiveness to instrument counter-examples (e.g., multiple exemplars; portrayal of positive consequences) were also discussed.