分离型的多级评分认知诊断模型开发及其应用研究

本文基于DINO模型开发出一种分离型的多级评分认知诊断模型(P-DINO模型),并采用Monte Carlo模拟与实证研究相结合的范式,探讨了新模型的性能与有效性。结果表明:(1)P-DINO模型参数估计精度较好,参数估计的稳健性较强。(2)采用MCMC算法可以实现该模型的参数估计,估计结果较理想。(3)测验长度的增加能有效提高模型的判准率,被试人数的增加对判准率的提高相对较小,属性个数的增加会降低判准率。(4)在抑郁症状评估中,P-DINO模型的表现要优于DINO模型与传统的抑郁症状评估。     

Tailoring the Mode of Information Presentation: Effects on Younger and Older Adults' Attention and Recall of Online Information

Previous studies have mainly focused on tailoring message content to match individual characteristics and preferences. This study investigates the effect of a website tailored to individual preferences for the mode of information presentation, compared to 4 nontailored websites on younger and older adults' attention and recall of information, employing a 5 (condition: tailored vs. text, text with illustrations, audiovisual, combination) × 2 (age: younger [25–45] vs. older [≥65] adults) design (N = 559). The mode‐tailored condition (relative to nontailored conditions) improved attention to the website and, consequently, recall in older adults, but not in younger adults. Younger adults recalled more from nontailored information such as text only or text with illustrations, relative to tailored information.     

Perceived racism, discrimination, and acculturation in suicidal ideation and suicide attempts among black young adults

During young adulthood the suicide rate among Blacks rises dramatically and approaches that of the U.S. general population, requiring that prevention efforts include a focus on Black young adults. Although most research on suicidality among Blacks has focused on risk factors observed in the dominant culture, in this study the authors examined associations between perceived discrimination, racism, and acculturation with lifetime suicidal ideation (SI) and suicide attempt (SA) among Black young adults. Two hundred fifty Black or African American individuals aged 18-24 residing in a midsize northeastern city were recruited to participate through advertisements. Participants filled out self-report questionnaires. Logistic regressions were used to examine the association of each predictor with SI and SA. Greater perceived acculturation was associated with SI in univariate and multivariate models. There were no other statistically significant results concerning the predictors of interest. The link between perceived acculturation and SI is consistent with limited available data, indicating the need for further study including the potential mechanism(s) for the association. Limitations include the cross-sectional design and reliance on subjective measures.     

“道”性、“水”性、人性、中国人人格

＂道＂性-＂水＂性-人性-中国人人格具有内在一致性,形成了一个一以贯之的有机体系。在这一有机体系中,作为＂道＂性的＂代言人＂,＂水＂性成为＂道＂性与人性及中国人人格间的＂中介者＂。以＂几于道＂的＂水＂为中介,通过对道家思想的分析,反观得到了道家思想影响下中国人的人性建构及人格特征,具体表现为：在思维上明＂道＂并懂得＂道＂的运行规律,以联系、变化和矛盾的眼光看待万事万物,情绪情感上静而不躁,意志品质上柔韧而不强作妄为,行事处世上既超脱一已之私、于物寡欲,又能待人谦退不争,并能从整体上显现出＂道＂之＂自然本真＂的根本特性。文末探讨了道家思想文化影响下,所形成的中国人独特的人格特征与现代化建设事业可能的适应情形。     

Associations of Psychosocial Factors with Maternal Confidence Among Japanese and Vietnamese Mothers

We conducted this cross-sectional study among 392 Japanese and 294 Vietnamese mothers who attended routine child health visits in a Japanese city and at a tertiary hospital in Vietnam, in order to investigate the prevalence and associated sociodemographic, parenting, and psychological characteristics of low maternal confidence in child rearing among them. All data were collected from medical files in Japan, and from medical files and self-administered questionnaires in Vietnam. The proportion of mothers without secure feeling of confidence in the present study was 22% in Japan and 66% in Vietnam. Significant factors associated with a lack of confidence were first-time motherhood and unintended pregnancy in the Japanese dataset and younger age in the Vietnamese dataset. In both groups, a higher proportion of mothers who lacked confidence reported negative parenting outcomes than did confident mothers. Among the three psychological measurements (mood, self-efficacy and depression), higher self-efficacy was associated independently with a significantly reduced risk of not having confidence in child rearing. These results suggest the importance of developing parenting support programs to help Japanese and Vietnamese mothers, particularly those who are young, first-time mothers or who became pregnant unexpectedly, improve their self-efficacy.     

Effects of Ingroup Bias and Gender Role Violations on Acquaintance Rape Attributions

Two studies of ethnically diverse US college students from northern California examined whether ingroup bias and gender norm violations influence acquaintance rape attributions (Study 1, N?=?118; Study 2, N?=?140). Participants read vignettes depicting acquaintance rape and completed questionnaires. Victims were part of participants’ ingroup or outgroup. Study 1 manipulated the victim’s sexual history (chaste or promiscuous). Study 2 manipulated the victim’s alcohol use (sober or intoxicated). Ingroup victims were perceived more positively than outgroup victims if the victims were promiscuous or intoxicated. More guilt was attributed to rapists of ingroup victims than outgroup victims if the victims were promiscuous or intoxicated. Findings are examined in relation to ingroup bias and gender norm violations.     

单纯呈现效应与积极情感的产生

该研究以汉语双字词为刺激材料 ,以大学生为被试,首先分别检验了标准的情感启动范式和单纯呈现范式的有效性.然后,用在标准的单纯重复呈现范式中产生了典型单纯呈现效应的中性刺激,替换标准情感启动范式中情感属性为积极的启动刺激,再次进行标准的情感启动测验,仍然观察到了情感启动效应,而同样是这些中性刺激,当没有被重复呈现时,在标准的情感启动测验中没有观察到情感启动效应.结果表明,刺激的重复呈现会导致偏好的产生,使其能够起到积极情感刺激的作用.研究认为,刺激的重复呈现,可能是积极情感产生的一个来源.     

家庭环境类型与青少年亲子冲突解决的关系

以北京829名普通中学生为被试.探讨了家庭环境类型与亲子冲突解决的关系.结果表明: (1)高亲密度、高情感表达、低矛盾性的家庭在亲子冲突解决的关系目标上的得分显著高于其它类型家庭;低亲密度、低表达性、高矛盾性的家庭在权力、公平、自认和自主目标上的得分显著高于其它类型家庭. (2)高亲密度、高表达性、低矛盾性的家庭更多使用积极的冲突解决策略;低亲密度、低表达性、高矛盾性的家庭更多使用消极的冲突解决策略.说明不同家庭环境类型下的青少年亲子冲突解决有不同的特点.     

高等师范院校调剂生学习动机及其与心理健康的关系

以大学一年级新生中的调剂生为调查对象,先后测查了他们间隔六月的学习动机及其心理健康状况。首先探讨了大学生学习动机的整体特点及通过调剂与非调剂生学习动机的横向比较与纵向对比所反映的学习动机的独特性,随后考察了调剂生学习动机与心理健康的关系。研究表明：调剂与非调剂生在学习动机上并无本质的差异,过分夸大两者在学习上的差异并不可取。     

Beta-adrenergic receptor activation during distinct patterns of stimulation critically modulates the PKA-dependence of LTP in the mouse hippocampus

Activation of β-adrenergic receptors (β-ARs) enhances hippocampal memory consolidation and long-term potentiation (LTP), a likely mechanism for memory storage. One signaling pathway linked to β-AR activation is the cAMP-PKA pathway. PKA is critical for the consolidation of hippocampal long-term memory and for the expression of some forms of long-lasting hippocampal LTP. How does β-AR activation affect the PKA-dependence, and persistence, of LTP elicited by distinct stimulation frequencies? Here, we use in vitro electrophysiology to show that patterns of stimulation determine the temporal phase of LTP affected by β-AR activation. In addition, only specific patterns of stimulation recruit PKA-dependent LTP following β-AR activation. Impairments of PKA-dependent LTP maintenance generated by pharmacologic or genetic deficiency of PKA activity are also abolished by concurrent activation of β-ARs. Taken together, our data show that, depending on patterns of synaptic stimulation, activation of β-ARs can gate the PKA-dependence and persistence of synaptic plasticity. We suggest that this may allow neuromodulatory receptors to fine-tune neural information processing to meet the demands imposed by numerous synaptic activity profiles. This is a form of “metaplasticity” that could control the efficacy of consolidation of hippocampal long-term memories.The hippocampus importantly contributes to memory function in the mammalian brain (Zola-Morgan et al. 1986; Eichenbaum et al. 1990; Otto and Eichenbaum 1992; Phillips and LeDoux 1992; Remondes and Schuman 2004). It has reciprocal connections with numerous cortical areas, including those responsible for high-level integration of spatial and contextual data from the external environment (Lavenex and Amaral 2000). As such, the hippocampus is well positioned to receive and survey a broad range of information and select behaviorally salient data for long-term storage. Activity-dependent enhancement of hippocampal synaptic strength can store information carried in patterns of afferent neural activity (Bliss and Collingridge 1993; Moser et al. 1998; Nathe and Frank 2003; Whitlock et al. 2006). Substantial evidence suggests that long-term potentiation (LTP) of synaptic strength plays important roles in the formation of long-term memory (LTM) (Doyere and Laroche 1992; Bourtchuladze et al. 1994; Abel and Lattal 2001; Genoux et al. 2002). As such, mechanistic studies of LTP have shed valuable light on how the mammalian brain stores new information.The hippocampus receives dense noradrenergic projections from the locus coeruleus, a brain structure that can influence many vital brain functions, including attention, sleep, arousal, mood regulation, learning, and memory (Berridge and Waterhouse 2003). Both α- and β-adrenergic receptor subtypes are present on hippocampal neurons (Morrison and Foote 1986; Berridge and Waterhouse 2003), and noradrenaline (NA) acts on hippocampal β-adrenergic receptors (β-ARs) to facilitate the retention and recall of memory (Izquierdo et al. 1998; Ji et al. 2003; Murchison et al. 2004). In humans, stimulation of the noradrenergic neuromodulatory system enhances memory for emotional stimuli, and inhibition of β-ARs prevents this memory enhancement (Cahill et al. 1994; van Stegeren et al. 1998; O’Carroll et al. 1999).Consistent with the notion that selective enhancement of LTM may occur following β-AR activation, stimulation of β-ARs can also facilitate the persistence of LTP. In areas CA3 and CA1, β-AR activation facilitates the induction of long-lasting LTP when paired with certain patterns of electrical stimulation (Huang and Kandel 1996; Gelinas and Nguyen 2005). However, the mechanisms by which different patterns of stimulation control synaptic responsiveness to β-AR activation are unclear.β-ARs couple to guanine-nucleotide-binding regulatory Gs proteins to stimulate adenylyl cyclase activity and increase intracellular cAMP (Seeds and Gilman 1971; Maguire et al. 1977). A main target of cAMP signaling is activation of cAMP-dependent protein kinase (PKA), a kinase that is required for some forms of long-lasting LTP and for consolidation of hippocampal LTM (Frey et al. 1993; Abel et al. 1997; Nguyen and Woo 2003). Interestingly, the PKA-dependence of hippocampal LTP displays plasticity: Specific temporal patterns of synaptic stimulation, such as repeated and temporally spaced 100-Hz stimulation, elicit LTP that requires PKA for its expression (Woo et al. 2003). Also, spatial “enrichment” can increase the PKA-dependence of LTP in mice, and this is correlated with improved hippocampal memory function (Duffy et al. 2001). However, it is unclear whether activation of β-ARs can critically gate the PKA-dependence of LTP. In this study, we examine the effects of β-AR activation on LTP generated by various patterns of afferent stimulation in area CA1 of the hippocampus, and we determine the role of PKA in these β-AR-modulated forms of LTP.