Statistical inference and sensitivity to sampling in 11-month-old infants

Research on initial conceptual knowledge and research on early statistical learning mechanisms have been, for the most part, two separate enterprises. We report a study with 11-month-old infants investigating whether they are sensitive to sampling conditions and whether they can integrate intentional information in a statistical inference task. Previous studies found that infants were able to make inferences from samples to populations, and vice versa [Xu, F., & Garcia, V. (2008). Intuitive statistics by 8-month-old infants. Proceedings of the National Academy of Sciences of the United States of America, 105, 5012-5015]. We found that when employing this statistical inference mechanism, infants are sensitive to whether a sample was randomly drawn from a population or not, and they take into account intentional information (e.g., explicitly expressed preference, visual access) when computing the relationship between samples and populations. Our results suggest that domain-specific knowledge is integrated with statistical inference mechanisms early in development.     

汉字早期字形加工中的部件数效应

探讨部件数效应是否在汉字早期字形加工中存在。要求被试识别重复速示方式下的具有不同部件数的汉字字形。大学生为被试。在实验1中,发现4部件字比在通透性、笔画数、字频和像素数上匹配的2部件字更容易识别字形;在实验2中,2部件字的通透性比4部件字更好,此时没有识别成绩上的差异。上面的结果表明在字形加工中存在着部件数效应,它指部件越多越容易识别汉字字形。在讨论部分提出了一个字形加工的部分线索模型,它指被试可以根据汉字的部分线索(例如部件)识别整个汉字。     

精加工推理中的文章结构清晰度效应

本研究旨在探讨文章结构清晰度对读者在阅读时所构建的精加工推理的水平和阶段的影响。研究采用让被试阅读后做推理测试题的方法 ,通过分析其答题成绩得出的结果表明 :文章的结构越清晰 ,越有利于读者在阅读的过程中进行精加工推理。     

现代社会伦理秩序的发生路径

“自发生成论”和“理性创设论”是传统道德哲学关于社会伦理秩序生成的两种理论模式。“自发生成论”认为,伦理道德不是纯粹人类理性设计的产物,而是人类行为实践的自然结果;“理性创设论”认为,伦理道德是人类自觉建构的结果,是人类理性创设的产物。这两种理论模式都以抽象的人性为其理论基础,无法合理解释个体与类之间的伦理关系。基于现实伦理实体的“创生拓展”应成为现代社会伦理秩序的发生路径。     

Before Reproduction: The Distortion of Generation

Jean Baudrillard has posited a theory of ‘the precession of simulacra’, arguing that it is no longer possible to tell the difference between an image and the meaning it purports to represent because technology allows the image to precede its meaning. Christa Wolf, while researching Cassandra: A Novel and Four Essays (1984), traveled to Greece and discovered the ways in which language in the rational, Western model of civilization has been distorted. Both Baudrillard and Wolf are disturbed by the ways in which sign systems can be manipulated and generated, and both demonstrate the effect this has in the political and cultural arenas. This analysis intends to show how Baudrillard’s theories play out in Wolf’s narrative, and how Wolf resolves the problems thus posed through the shock of the aesthetic experience, which forces communication while it defies representation.

The SNARC effect does not imply a mental number line

In this study, we directly contrast two approaches that have been proposed to explain the SNARC effect. The traditional direct mapping account suggests that a direct association exists between the position of a number on the mental number line and the location of the response. On the other hand, accounts are considered that propose an intermediate step in which numbers are categorized as either small or large between the number magnitude and the response representations. In a magnitude comparison task, we departed from the usual bimanual left/right response dimension and instead introduced the unimanual close/far dimension. A spatial-numerical association was observed: small numbers were associated with a close response, while large numbers were associated with a far response, regardless of the movement direction (left/right). We discuss why these results cannot be explained by assuming a direct mapping from the representation of numbers on a mental number line to response locations and discuss how the results can be explained by the alternative accounts.     

A colorful walk on the mental number line: Striving for the right direction

Verguts and Van Opstal [Verguts, T., & Van Opstal, F. (2008). A colorful walk, but is it on the mental number line? Reply to Cohen Kadosh, Tzelgov, and Henik, Cognition, 106, 558-563] cleverly explained the results of Cohen Kadosh, Tzelgov, and Henik [Cohen Kadosh, R., Tzelgov, J., & Henik, A. (2008). A synesthetic walk on the mental number line: The size effect, Cognition, 106, 548-557] as a result of different association strength between the size of a number and its color in synesthesia. Here we present three challenges to their alternative explanation, and support our original suggestion.     

Left to right: representational biases for numbers and the effect of visuomotor adaptation

Adaptation to right-shifting prisms improves left neglect for mental number line bisection. This study examined whether adaptation affects the mental number line in normal participants. Thirty-six participants completed a mental number line task before and after adaptation to either: left-shifting prisms, right-shifting prisms or control spectacles that did not shift the visual scene. Participants viewed number triplets (e.g. 16, 36, 55) and determined whether the numerical distance was greater on the left or right side of the inner number. Participants demonstrated a leftward bias (i.e. overestimated the length occupied by numbers located on the left side of the number line) that was consistent with the effect of pseudoneglect. The leftward bias was corrected by a short period of visuomotor adaptation to left-shifting prisms, but remained unaffected by adaptation to right-shifting prisms and control spectacles. The findings demonstrate that a simple visuomotor task alters the representation of space on the mental number line in normal participants.     

A mental number line in human newborns

Humans represent numbers on a mental number line with smaller numbers on the left and larger numbers on the right side. A left‐to‐right oriented spatial–numerical association, (SNA), has been demonstrated in animals and infants. However, the possibility that SNA is learnt by early exposure to caregivers’ directional biases is still open. We conducted two experiments: in Experiment 1, we tested whether SNA is present at birth and in Experiment 2, we studied whether it depends on the relative rather than the absolute magnitude of numerousness. Fifty‐five‐hour‐old newborns, once habituated to a number (12), spontaneously associated a smaller number (4) with the left and a larger number (36) with the right side (Experiment 1). SNA in neonates is not absolute but relative. The same number (12) was associated with the left side rather than the right side whenever the previously experienced number was larger (36) rather than smaller (4) (Experiment 2). Control on continuous physical variables showed that the effect is specific of discrete magnitudes. These results constitute strong evidence that in our species SNA originates from pre‐linguistic and biological precursors in the brain.     

Language counts: Early language mediates the relationship between parent education and children's math ability

Children's early math skills have been hailed as a powerful predictor of academic success. Disparities in socioeconomic context, however, also have dramatic consequences on children's learning. It is therefore critical to investigate both of these distinct contributors in order to better understand the early foundations of children's academic outcomes. This study tests an integrated model of children's developing math ability so as to (1) identify the specific skills and abilities most clearly linked to early math achievement and (2) measure the influence of children's socioeconomic context on each of these skills. We first evaluated the early vocabulary, number word knowledge (knower level), and Approximate Number System (ANS) acuity of a diverse group of preschoolers. Then, approximately 1 year later as they entered Kindergarten, we administered a test of early math achievement. We find that children's early language (general vocabulary and number word knowledge) fully mediates the relationship between parent education and math ability. Additionally, number word knowledge mediates the relationship between ANS acuity and early math. We argue that increased focus on number word knowledge, as well as general vocabulary, may help to minimize disparities in math ability as children enter kindergarten. We also highlight the role of parent education on children's learning and note that this may be an important locus for intervention.