The effects of focal and global attentional systems on spatial biases

The background page on which a stimulus is presented can influence the allocation of attention to that stimulus. The purpose of this study was to learn if there are hemispheric asymmetries in how background distraction affects attentional processing. Asymmetries were investigated by having right eye dominant subjects perform line bisections and manipulating the side of background distraction (right versus left), the eye of regard (right versus left), and the type of attention allocated (focal versus global). Overall subjects bisected lines to the left of center (pseudoneglect) and when viewing with the right eye (versus left) deviated more to the left. Subjects had more background distraction when viewing symbol than solid lines. Although overall, bias did not differ with the side of background distraction or the line being on one side or the other, when subjects viewed symbol, but not solid lines, this leftward bias was increased when the line was displaced to the right, thereby increasing the size of the left sided background. These findings suggest that when engaging the left hemisphere by using focused attention and placing the line on the right side, there is more distraction than when the right hemisphere is engaged.     

A COMPARISON OF NONCONTINGENT REINFORCEMENT AND SENSORY EXTINCTION AS TREATMENTS FOR SELF-INJURIOUS BEHAVIOR

We compared the effects of two treatments, noncontingent reinforcement (NCR) and sensory extinction (EXT), on the self-injurious behavior (SIB) exhibited by 3 individuals with developmental disabilities. Results of a functional analysis indicated that their SIB was not maintained by social reinforcement, as indicated by undifferentiated responding across assessment conditions or higher rates of responding in the alone condition. Prior to treatment, leisure probes were conducted to identify highly preferred items for use in the NCR condition, and equipment probes were conducted to identify devices that produced the greatest behavioral suppression for use in the EXT condition. Following baseline, treatment was implemented in a multiple baseline across subjects design, and the effects of NCR and EXT were compared in a multielement format. During NCR sessions, participants had continuous access to a highly preferred item. During EXT sessions, participants wore equipment (gloves or protective sleeves) that seemed to attenuate stimulation directly produced by their SIB, while still allowing the behavior to occur. Results indicated that both procedures were effective in reducing SIB, although NCR was associated with either more rapid or greater overall response suppression.     

Reply to William R. Ferrell's paper "Calibration of sensory and cognitive judgments: A single model for both"

William R. Ferrell's paper is a reply to our article "Calibration of sensory and cognitive judgments: Two different accounts", 1993, 34, 135–148 in this journal. Ferrell's critique centres around three issues: (1) The model of sensory discrimination proposed by Björkman et al. (1993) and discussed in Winman and Juslin (1993) is not new, (2) this model does not predict underconfidence, (3) there is no need for separate models of calibration of sensory and cognitive judgments. Below we respond to each of the three issues raised by Ferrell.     

Availability to peer group treatment in residential care as a function of relational ethics

Forty-five adolescent boys from abusive and depriving homes were not doing well in positive peer culture residential care. Despite their backgrounds, given a modified form of the Relational Ethics Scale, they indicated that their relational life with their families of origin was trustworthy, fair, and worthy of continued devotion. In contrast, on the Firo-B these same boys demonstrated distrust of others outside of their families and an unwillingness to get involved. These results support the inference from contextual family theory that peer group interventions cannot bypass identification and resolution of the injustices that took place in the family of origin.This project was fully supported by Teen Ranch, Inc., Marlette, MI 48453.     

贝叶斯推理研究综述

Kahneman 和Tversky在70年代初期发现人们在概率推理中并不遵循数学上的贝叶斯定理,常常由于忽略问题中的基础概率而对稀少事件的条件概率作出夸大的反应。此后心理学家采用文本范式和经验范式对此问题进行了大量的研究,并涌现了一些不同的理论观点,主要有启发法策略论(代表性启发法和可得性启发法)、自然抽样空间假说、频率效应论和抽样加工理论。     

Spatial analysis after perinatal stroke: patterns of neglect and exploration in extra-personal space

This study was conducted to determine whether school-aged children who had experienced a perinatal stroke demonstrate evidence of persistent spatial neglect, and if such neglect was specific to the visual domain or was more generalized. Two studies were carried out. In the first, 38 children with either left hemisphere (LH) or right hemisphere (RH) damage and 50 age-matched controls were given visual cancellation tasks varying in two factors: target stimuli and stimulus array. In the second study, tactile neglect was evaluated in 41 children with LH or RH damage and 72 age-matched controls using a blindfolded manual exploration task. On the visual cancellation task, LH subjects omitted more target stimuli on the right, but also on the left, compared with controls. Children with RH lesions also produced a larger number of omissions on both the left and right sides than controls, but with poorer performance on the left. On the manual exploration task, LH children required significantly longer times to locate the target on both sides of the board than did controls. RH children had significantly prolonged search times on the left side, but not on the right, compared with controls. In both tasks, LH subjects employed unsystematic search strategies more often than both control and RH children. The search strategy of RH children also tended to be erratic when compared to controls, but only in the random arrays of the visual cancellation tasks; structure of the target stimuli improved their organization. These results demonstrate that children with early LH brain damage display bilateral difficulties in visual and tactile modalities; a pattern that is in contrast to that seen in adults with LH damage. This may result from disorganized search strategies or other subtle spatial or attentional deficits. Results of performance of RH children suggests the presence of contralateral neglect in both the visual and tactile modalities; a finding that is similar to the neglect in adult stroke patients with RH lesions. The fact that deficits in spatial attention and organizational strategies are present after very early focal damage to either the LH or the RH broadens our understanding of the differences in functional lateralization between the immature and mature brain. These results also add to evidence for limitations to plasticity in the developing brain. Our findings may have therapeutic and rehabilitative implications for the management of children with early focal brain lesions.     

预期如何影响人们对不愉快事件的体验?

本研究以味觉和痛觉两种感觉通道的体验为对象,探讨预期效价和预期信心如何影响知觉体验的结果及其作用机制。通过基于味觉和痛觉的两个实验,发现预期会影响即时知觉体验,并且预期信心在其中起到调节作用——对预期充满信心时,即时体验和对结果的预期保持一致,预期越积极即时体验越好,预期越消极即时体验越差;而对预期缺乏信心时,即时体验和预期之间呈现背离趋势,预期越积极即时体验越差,预期越消极即时体验则越好。研究结果阐明了预期影响即时体验的机制,对我们理解身心关系也具有重要的理论意义。     

The Impact of Protective Factors on Posttraumatic Growth for College Student Survivors of Childhood Maltreatment

Many college students experience traumatic life events in childhood, yet demonstrate personal growth following these experiences. Deriving benefit in the face of adversity has been termed “posttraumatic growth.” The relationship between posttraumatic growth and childhood experiences of abuse and neglect was investigated in a sample of 501 college students. The primary focus was on what protective factors moderated the relationship between childhood experiences of abuse and neglect and later posttraumatic growth. It was found that although the protective factors of acceptance, positive reframing, and emotional support all significantly predicted scores on the Posttraumatic Growth Inventory, only the factor of prosocial adults and the overall number of social and emotional resources experienced moderated the relationship between childhood maltreatment and posttraumatic growth. These findings have implications for designing effective interventions that foster growth in college students who report a history of childhood maltreatment.     

儿童期情感忽视对大学生抑郁的影响:控制感与情绪调节自我效能感的链式中介作用

为探讨儿童期情感忽视与大学生抑郁的关系,以及控制感和情绪调节自我效能感在其中的中介作用,采用儿童期创伤问卷、控制感量表、情绪调节自我效能感量表和贝克抑郁量表(第2版),对重庆市两所高校共837名大学生进行调查。结果显示:(1)儿童期情感忽视显著正向预测大学生抑郁;(2)控制感、情绪调节自我效能感在儿童期情感忽视与抑郁之间起独立中介作用;(3)控制感与情绪调节自我效能感在儿童期情感忽视与抑郁之间起链式中介作用,且情绪调节自我效能感各维度的效应皆成立。本研究考察了儿童期情感忽视对抑郁的影响及其作用机制,为家庭教养方式的改善及大学生抑郁问题的预防与干预提供了实践启示。     

A COMPARISON OF SENSORY INTEGRATIVE AND BEHAVIORAL THERAPIES AS TREATMENT FOR PEDIATRIC FEEDING DISORDERS

We compared the effects of escape extinction (EE) plus noncontingent reinforcement (NCR) with sensory integration therapy as treatment for the feeding problems of 2 children. Results indicated that EE plus NCR was more effective in increasing acceptance, decreasing inappropriate behavior, and increasing amount consumed relative to sensory integration for both children. The results are discussed in terms of the challenges of evaluating sensory‐integration‐based treatments, and the reasons why component analyses of multicomponent treatments like sensory integration are important.