A systematic literature review of the average IQ of sub-Saharan Africans

On the basis of several reviews of the literature, Lynn [Lynn, R., (2006). Race differences in intelligence: An evolutionary analysis. Augusta, GA: Washington Summit Publishers.] and Lynn and Vanhanen [Lynn, R., & Vanhanen, T., (2006). IQ and global inequality. Augusta, GA: Washington Summit Publishers.] concluded that the average IQ of the Black population of sub-Saharan Africa lies below 70. In this paper, the authors systematically review published empirical data on the performance of Africans on the following IQ tests: Draw-A-Man (DAM) test, Kaufman-Assessment Battery for Children (K-ABC), the Wechsler scales (WAIS & WISC), and several other IQ tests (but not the Raven's tests). Inclusion and exclusion criteria are explicitly discussed. Results show that average IQ of Africans on these tests is approximately 82 when compared to UK norms. We provide estimates of the average IQ per country and estimates on the basis of alternative inclusion criteria. Our estimate of average IQ converges with the finding that national IQs of sub-Saharan African countries as predicted from several international studies of student achievement are around 82. It is suggested that this estimate should be considered in light of the Flynn Effect. It is concluded that more psychometric studies are needed to address the issue of measurement bias of western IQ tests for Africans.     

张鲁生平新考

关于张鲁生平的史传,较详细地记载了其任督义司马袭杀张修至归降曹操一段,而对于其生卒年及其他事件却没有明确地说明。本文以三张与张修的关系为视角,运用新材料对张鲁的生平进行了再考证。     

在跨文化的诠释中确立典范——杨庆堃关于中国弥漫性宗教概念的意义

在充分认识不同宗教的本质与差异的前提下,相对于西方的制度性宗教,杨庆堃创造性地提出了"弥漫性"宗教的社会学概念,使中国宗教研究得以在社会学的话语体系中获得空间。本文从宗教之间彼此诠释的重要性入手,探讨杨庆堃为中国宗教研究树立的典范:在不同文化、不同宗教间相互诠释与理解的基础上进行宗教社会学的研究,在跨文化(宗教)的诠释中来深化对中国宗教的解说与理解。     

Rats’ visual-spatial working memory: New object choice accuracy as a function of number of objects in the study array

When rats had to find new (jackpot) objects for rewards from among previously sampled baited objects, increasing the number of objects in the sample (study) segment of a trial from 3 to 5 and then to 7 (Experiment 1) or from 3 to 6 and 9 (Experiments 2 and 3) or from 6 to 9 and 12 (Experiment 4) did not reduce rats’ test segment performance. Increasing study segment size improved test segment performance contrary the limited-capacity hypothesis concerning rats’ spatial working memory. This effect occurred when objects either differed visually (Experiments 1, 2, 4) or only by odor (Experiment 3). Rats performed no better than chance in finding a jackpot on their first choice from among three visually different objects in Experiments 1 and 2. Furthermore, results from Experiments 2 and 3 indicate that differences in the probability of finding a jackpot by chance in Experiment 1 were not responsible for failure to find the predicted inverse relationship. Results from Experiment 4 indicate that those from Experiments 2 and 3 were not solely due to size of test arrays. We discussed whether our findings could be attributed to innate foraging or perceptual isolation processes during testing or to perceptual encoding processes during exposure to study segment arrays.     

The trouble with having standards

Philosophical Studies - The uniqueness thesis states that for any body of evidence and any proposition, there is at most one rational doxastic attitude that an epistemic agent can take toward that...     

儿童心理虐待与忽视和自杀意念的关系：有调节的中介模型

采用问卷法对988名初中生进行调查,探究儿童心理虐待与忽视和自杀意念的关系,应对方式的中介作用以及友谊质量的调节作用。结果表明：（1）儿童心理虐待与忽视正向预测自杀意念;（2）应对方式是儿童心理虐待与忽视和自杀意念之间的中介变量;（3）儿童心理虐待与忽视对自杀意念的直接效应受到友谊质量的调节,直接效应对于友谊质量低的青少年更显著;（4）儿童心理虐待与忽视通过应对方式对自杀意念的间接效应的后半段受到友谊质量的调节,友谊质量高的青少年的自杀意念水平相对更低。因此,儿童心理虐待与忽视和自杀意念之间是有调节的中介关系,儿童心理虐待与忽视通过应对方式影响自杀意念,友谊质量在直接路径和间接路径中起调节作用。     

情绪启动对低自尊个体注意偏向的影响

研究通过两个实验来探讨情绪启动对低自尊个体注意偏向的影响。实验一采用点探测实验范式考察高、低自尊个体的注意偏向特点。实验二将重复启动范式和点探测实验范式相结合,进一步探讨情绪启动如何影响低自尊水平个体注意偏向。结果表明：低自尊个体对负性信息存在注意偏向;情绪启动对低自尊个体注意偏向有显著的影响。正性情绪启动对低自尊个体负性注意偏向有显著的调节作用,负性情绪启动加重了低自尊个体的负性注意偏向。     

Gender differences in adolescent coping behaviors and suicidal ideation: findings from a sample of 73,238 adolescents

Suicide among adolescents is an emerging global public health problem as well as a socioeconomic problem. Stress-coping strategies have been shown to be associated with suicidal ideation. We examined coping behaviors related to suicidal ideation and gender differences in adolescents using the data from the 2010 Korea Youth Risk Behavior Survey (ages 12–19 years; N = 73,238). Logistic regression analysis was used to evaluate associations between suicidal ideation and specific coping behaviors while controlling for potentially confounding variables. In both male and female groups, the coping behavior “drinking alcoholic beverages” and “smoking cigarettes” were positively associated with suicidal ideation. “Watching TV,” “playing online/mobile games,” and “sleeping” were negatively associated with suicidal ideation in both groups. In males, “engaging in sports” was negatively related to suicidal ideation. In females, “venting by talking to others” and “eating” were negatively related to suicidal ideation. The results indicate that there are gender differences in the effects of coping behaviors on adolescent suicidal ideation, and that developing adaptive coping strategies may function to reduce suicidality. Future studies are needed to examine whether improving coping skills can reduce suicidal ideation in a gender-specific manner.     

A generalized linear factor model approach to the hierarchical framework for responses and response times

We show how the hierarchical model for responses and response times as developed by van der Linden (2007), Fox, Klein Entink, and van der Linden (2007), Klein Entink, Fox, and van der Linden (2009), and Glas and van der Linden (2010) can be simplified to a generalized linear factor model with only the mild restriction that there is no hierarchical model at the item side. This result is valuable as it enables all well‐developed modelling tools and extensions that come with these methods. We show that the restriction we impose on the hierarchical model does not influence parameter recovery under realistic circumstances. In addition, we present two illustrative real data analyses to demonstrate the practical benefits of our approach.