Learning phonetic categories by tracking movements

We explore in this study how infants may derive phonetic categories from adult input that are highly variable. Neural networks in the form of self-organizing maps (SOMs; ) were used to simulate unsupervised learning of Mandarin tones. In Simulation 1, we trained the SOMs with syllable-sized continuous F(0) contours, produced by multiple speakers in connected speech, and with the corresponding velocity profiles (D1). No attempt was made to reduce the large amount of variability in the input or to add to the input any abstract features such as height and slope of the F(0) contours. In the testing phase, reasonably high categorization rate was achieved with F(0) profiles, but D1 profiles yielded almost perfect categorization of the four tones. Close inspection of the learned prototypical D1 profile clusters revealed that they had effectively eliminated surface variability and directly reflected articulatory movements toward the underlying targets of the four tones as proposed by . Additional simulations indicated that a further learning step was possible through which D1 prototypes with one-to-one correspondence to the tones were derived from the prototype clusters learned in Simulation 1. Implications of these findings for theories of language acquisition, speech perception and speech production are discussed.     

Postscript: sortal concepts are fundamental for tracing identity

Our discussion with Rips, Blok, and Newman (2006; Blok, Newman, & Rips, in press; Rhemtulla & Xu, in press) has brought together theory and evidence from researchers in adult cognition and those in infant development. By this point, researchers all recognize that any theory of concepts of individuals must consider the evidence from infants' first concepts as well as explicit adult reasoning tasks. Despite this agreement, we continue to disagree on several fundamental issues.     

Prevention of Postpartum Depression in Low-Income Women: Development of the Mamás y Bebés/Mothers and Babies Course

A prenatal intervention designed to prevent the onset of major depressive episodes (MDEs) during pregnancy and postpartum was pilot tested at a public sector women’s clinic. The Mamás y Bebés/Mothers and Babies Course is an intervention developed in Spanish and English that uses a cognitive-behavioral mood management framework, and incorporates social learning concepts, attachment theory, and socio-cultural issues. The four goals of this project were to develop the intervention, assess its acceptability, test the feasibility of conducting a randomized trial with public sector patients, and obtain estimates of its effect size. Forty-one pregnant women at high risk for developing MDEs were randomized to the Mothers and Babies Course (n = 21) or a comparison condition (n = 20). Assessments occurred during pregnancy and at 1, 3, 6, and 12 months postpartum. Differences in terms of depression symptom levels or incidence of MDEs between the two groups did not reach statistical significance in this pilot trial. However, the MDE incidence rates of 14% for the intervention condition versus 25% for the comparison condition represent a small effect size (h = 0.28) that will be further examined in a larger scale study. The intervention was well received by the participants and implementation of a randomized trial appeared quite feasible as indicated by our follow-up rate of 91% at 12 months. Implications for the continuing development of preventive interventions for perinatal depression are discussed.     

Interpersonal factors and perinatal depressive symptomatology in a low-income Latina sample

Interpersonal factors are among the risk factors that predispose women to experiencing mood disturbances during the childbearing years. This study investigates the trajectory of change in depressive symptomatology over the course of the perinatal period as related to interpersonal risk factors (marital quality and social support) in a sample of 69 low-income, mostly immigrant Latina mothers at high and low risk for depression. We found a significant linear change in depressive symptomatology from baseline (pregnancy) through the postpartum period. This decline was steeper for high-risk women who reported high levels of social support compared with those who reported low levels of social support. In addition, a greater decline in depressive symptom scores was found for women who reported better postnatal marital quality, irrespective of risk group status. The results suggest the importance of considering marital quality and social support in estimations of risk for depression. These findings also have implications for targeting social support and marital quality in preventive interventions for perinatal depression in Latinas.     

海洛因戒断者吸毒及情绪注意偏向的ERP研究

海洛因戒断组对吸毒、正、负性线索注意偏向是理解戒断者复吸脑机制的重要手段之一。研究采用dot-probe实验范式,海洛因戒断组及正常被试各10名,分别记录64个电极点脑电数据。结果表明,戒断者吸毒线索注意偏向P200振幅显著高于正负性情绪线索,也显著高于正常组,提示戒断者存在吸毒线索注意偏向;N300振幅显著低于正常组,说明戒断者具有较低的情绪评价;吸毒线索诱发P300振幅显著高于正常组,表明戒断组对吸毒线索可能附加情绪加工。     

人际心理治疗的发展

人际心理治疗是一种有时间限制、基于操作手册和生活事件、诊断指向的实证性心理治疗方法。它最初主要被用于重型抑郁成年患者的门诊治疗,现已被用于治疗多种心理障碍。人际心理治疗过程变化包括：是否还赋予患者“病人”角色、人际关系问题领域的变化、如何处理结束和安排时间等。不过,有关治疗过程的研究还很少。为了更好地满足大众的需要,它与其他心理治疗成分进行了整合及其自身的简化。文章最后讨论了人际心理治疗发展的特点和问题     

"语音意识与语音智力同质说"初证

以128名小学一、三年级的学生为被试,以英语语音意识测验和言语智力测验为工具,采用因素分析的技术,初步探讨了“语音意识与语音智力同质说”的合法性问题。结果表明:(1)围绕小学一、三年级的英语语音意识和言语智力测验数据而进行的探索性因素分析,都抽取了唯一的公因子;(2)围绕小学一、三年级的英语语音意识和言语智力测验数据而进行的验证性因素分析也发现,小学一、三年级的语音智力结构模型,都具有出色的拟合度。这些结果都说明:“语音意识与语音智力同质说”具有合法性。     

国外心理健康服务及其启示

在回顾了美国、瑞典等国家心理健康服务概况的基础上提出了以下启示：1．中国心理健康服务体系应以构建和谐社会理论为基础;2．在心理服务的教育与培训中,应当尽量兼顾普及知识与提高专业化水平两个目标;3．政府应当大力支持社区心理健康服务以及包含各种社区可用资源的综合性社区服务;4．中国心理健康服务必须从本国文化与国情出发,因此还需要更多这方面的文献总结与实际诃查工作;5．心理健康服务应当全面而有区别地实施予心理健康水平不同的人群。     

不同解题条件下小学六年级学生真实性思考的研究

本研究采用7道真实性算术应用题构成的测试材料,考察了不同解题条件下小学六年级学生的真实性思考。选取优中差学生共74人,先在以班级为单位的数学测验中完成测试材料,然后进行事后个别访谈。结果表明：1）一般访谈显著地提高了学生真实性思考的水平;而访谈提示进一步显著地提高学生真实性思考的水平。2）不同学业水平学生之间在两次真实性思考提高量上都没有显著差异。3）在访谈中,优差学生在反应方式与真实性思考的层次性等方面表现出差异。基于这些研究结果,我们提出了相应的教育建议。     

幼儿对于图画作者情绪状态与其作品间关系的认知

采用将作者情绪状态与图画作品相匹配的方法,分别以线条、颜色和内容为线索,考察了3.5~5.5岁儿童对图画作者情绪状态与其作品间关系的认知发展。结果表明:3.5岁儿童尚不能将作者情绪状态与图画特点联系起来,4.5岁儿童开始能够将作者情绪状态与图画特点联系起来,5.5岁儿童的水平在此基础上又有明显的发展。儿童对作者情绪状态与图画间关系的把握显示出一定的性别差异,但对图画传递的情绪信息的认知在各要素形式(颜色、线条、内容)之间差异不明显。