行为决策中的基线比例忽略：心理机制与影响因素

基线比例忽略是指个体进行决策和判断时不能充分利用或者忽略基线比例而偏好新信息的现象。该现象普遍存在于日常行为与决策的许多领域,尤其显著表现在临床医疗领域,因此对这一现象的研究具有重要的应用价值。目前,基线比例忽略的心理机制主要有双加工理论和因果贝叶斯框架等。基线比例忽略的影响因素主要包括认知能力、年龄、基线比例的表述形式等。未来的研究需要从基线比例忽略的神经机制、影响因素以及应用研究的拓展等方面着手。     

“Where is the sun” for hemi-neglect patients?

Human observers use prior constraints to disambiguate a scene; in particular, light is preferentially seen as coming from above but also slightly from the left. One explanation of this lateral bias could be a cerebral hemispheric difference. The aim of the present study was to determine the preferred light source position for neglect patients. For this purpose, we used the ambiguous shaded “Polo Mint” stimulus, a ring divided into eight equal sectors. All sectors but one were the same shape, convex or concave, as determined by the light source position. Participants had to report the side (left or right) of the odd sector or, in a separate experiment, to report its shape (convex or concave). Eight patients with spatial neglect (left neglect N = 7, right neglect N = 1) after a right or left temporo-parietal or thalamic lesion and 14 control participants ran the experiment. Left neglect patients showed a significantly different light bias from the bias observed for controls and for the right neglect patient (i.e., a reduction of the left bias or a right bias rather than a left bias). We conclude that some disabilities presented by patients with spatial neglect may be due to difficulties processing information that is not present in the visual field or imagined in the representational scene.     

《周易》本经卦辞“小”义新论

《周易》本经卦辞中的"小"字当独立断读,并且在《旅》、《巽》、《遯》、《既济》、《贲》五卦卦辞中起到语义逻辑的枢纽作用,具有丰富的思想内涵。卦辞"小"义及相关卦爻辞的深入考释活动,体现了理解《周易》本经文本所需要的一种较为全面系统的解释方法。     

计算难度和知识背景对消费者百分数基数忽略的影响

在选择促销品时,消费者经常会出现百分数基数忽略错误,即价值判断时只基于百分数大小而忽略基数。本研究以150名大学生为被试,考察计算难度和知识背景对百分数基数忽略的影响。结果表明:仅了解百分数基数忽略现象的消费者无论计算难度高低均会出现百分数基数忽略错误;而了解促销计算原理的消费者在高难度下会出现这种错误,在低难度下则不会,且了解促销原理有助于减轻消费者在高难度下出现该错误的倾向。     

The role of corpus size and syntax in deriving lexico-semantic representations for a wide range of concepts

One of the most significant recent advances in the study of semantic processing is the advent of models based on text and other corpora. In this study, we address what impact both the quantitative and qualitative properties of corpora have on mental representations derived from them. More precisely, we evaluate models with different linguistic and mental constraints on their ability to predict semantic relatedness between items from a vast range of domains and categories. We find that a model based on syntactic dependency relations captures significantly less of the variability for all kinds of words, regardless of the semantic relation between them or their abstractness. The largest difference was found for concrete nouns, which are commonly used to assess semantic processing. For both models we find that limited amounts of data suffice in order to obtain reliable predictions. Together, these findings suggest new constraints for the construction of mental models from corpora, both in terms of the corpus size and in terms of the linguistic properties that contribute to mental representations.     

Controversies in Family Preservation Programs

Summary

This paper examines the controversies over the use of family preservation policies to prevent and treat child abuse and neglect. Policies that aim to preserve families in which child maltreatment has occurred are at least a century old. However, there is renewed interest in such policies, given the dramatic rise in child abuse and neglect reports and a large number of children who spend time in out-of-home placements. New intensive family preservation services were advanced as able to assure the safety of children while working toward a lasting preservation of the family unit. The paper summarizes the research on intensive family preservation services and reports that such programs do not reduce placements nor do they appear to enhance child safety. The paper concludes by proposing that risk assessments and assessments of readiness to change could improve decision-making regarding which families might be aided by family preservation and which children should be protected by terminating their parents' rights.     

Child Maltreatment,Family Characteristics and Adult Adjustment

Abstract

Two alternate processes that may explain the relationship between child maltreatment, childhood family characteristics and adult adjustment (mediation and moderation) were tested using retrospective data from a community sample (N= 175). The levels of five different types of child maltreatment did not mediate the relationship between childhood family variables and adult adjustment. In contrast, family background played a mediating role in the relationship between mal-treatment and adjustment. Evidence of moderation was found in the interactions between different maltreatment types in predicting adjustment. Partial support was found for the moderating influence of family factors on the relationship of maltreatment to adjustment.     

Trauma Exposure and Health: A Review of Outcomes and Pathways

A growing body of literature has established robust relations between trauma and a variety of adverse physical health outcomes. In both retrospective and prospective research, adults with a history of self-reported or court-substantiated maltreatment report significantly more health concerns than those without maltreatment histories, in both clinical and community samples, whether health problems are self-reported or physician-diagnosed. Two pathways by which poor health outcomes are theorized to occur include the biological pathway, which largely implicates severe stress and subsequent dysregulations in central stress-response systems as the underlying cause of health problems, and the behavioral pathway, which suggests that health risk behaviors are largely responsible for the relations between trauma and health. This article reviews the research evaluating the relations between various types of trauma, particularly physical and sexual abuse in childhood, and three such health outcomes: pain, gastrointestinal disorders, and cardiovascular disease. Evidence to support the biological and behavioral pathways is also reviewed.     

Using Multiple Informants to Assess Child Maltreatment: Concordance between Case File and Youth Self-Report

To understand the psychosocial implications of child maltreatment, methods used to document prevalence must be clear. Yet, rates of maltreatment found in child self-report are generally inconsistent with data found in case files from state social service agencies. Although it is known that self-reports and case file reports of abuse disagree on occurrence of specific events, it is unclear if reporters agree when overall categories of abuse are considered. This study investigated differences between case file and youth report of abuse by examining four types of abuse—physical, sexual, neglect, and psychological—in a within-subjects design using a sample of 97 youth in foster care aged 8 to 22. Case files were coded for the presence of any indication of each type of abuse. Self-report of abuse was also assessed for any indication of each type of abuse. Results indicated that, overall, youth reported more physical and psychological abuse, and younger youth reported more sexual abuse than documented in their file. Implications for research and service provision for maltreated youth are discussed.