A systematic evaluation of preferences identified through person-centered planning for people with profound multiple disabilities

Person-centered planning is becoming a popular means of designing supports for people with disabilities. However, very little research evaluating person-centered planning exists. We evaluated the degree to which items and activities reported to be preferred in person-centered plans represented accurate preferences based on how individuals responded when presented with the items and activities. Person-centered planning meetings were conducted with 4 individuals with profound multiple disabilities to develop preference maps and to identify leisure-related preferences. A sample of the reported preferences in the plans was then systematically assessed by observing each participant's approach and avoidance responses to the items and activities. Of the sampled items and activities reported to be preferred in the plans, 42% represented moderate preferences based on the latter assessment process and 33% represented strong preferences. With 2 participants, several preferences identified in the plans were nonpreferred items and activities based on the preference assessments, and some were frequently avoided. These results suggested that although person-centered plans may identify some accurate preferences for people with profound multiple disabilities, this approach should be used cautiously. Results also suggested that such plans should be supplemented with systematic preference assessments to ensure the accuracy of identified preferences. Future research areas focus on evaluating other aspects of person-centered planning.     

COMMENTS ON FUNCTIONAL ANALYSIS PROCEDURES FOR SCHOOL-BASED BEHAVIOR PROBLEMS

Functional analysis procedures were developed in the 1980s in an effort to determine whether clinicians could identify the function of behavior problems like self-injury and aggression. More recently, several groups of researchers have been attempting to extend that procedure to classroom environments. The following commentary reflects my viewpoint of this transition.     

The behavior analyst consulting model: Identifying and validating naturally effective instructional models

Increasingly, behavior analysts are attempting to develop interventions based on precision assessments of the situational factors surrounding a behavior of interest, those requiring reduction (as in functional analysis) or those requiring acceleration (as in ecobehavioral analysis). Using ecobehavioral assessments of naturalistic classroom instruction, we sought to identify a set of potentially effective procedures and to test their function. Using as selection criteria students' gains in academic achievement, and their observed academic behavior, we identified potentially effective versus ineffective instructional procedures used to teach language arts skills to students with learning disabilities (Study I). Subsequently, we sought to test and replicate the functionality of the identified procedures within a series of single-subject experiments. Results from a resource room application (Study II) indicated that the targeted effective procedure surpassed the targeted ineffective procedure in terms of both content mastery and the quality of students' written language samples. Results from a regular classroom application (Study III) indicated that the targeted effective procedure was also more effective than the conventional instructional procedure employed naturally by the regular education teacher. The implications of these findings are discussed.     

Full-field input generated from right visual field information for healthy participants reproduces performance simulating left unilateral spatial neglect in line bisection

Patients with left unilateral spatial neglect (USN) typically place the subjective midpoint to the right of the objective centre when bisecting a horizontal line. This pathological phenomenon may be explained as a result of greater dependence on the right endpoint in the external reference frame (Koyama et al., Brain Cogn, 35, 1997, 271; McIntosh et al., Cogn Brain Res, 25, 2005, 833). Ishiai et al. (Brain, 112, 1989, 1485) reported that once patients with USN fixated on a certain point on the right part of the presented line, they persisted with this point and marked the subjective midpoint there without leftward searches. Ishiai et al.'s interpretation was that the patients saw a totalised line representation that extended equidistantly to the right and left sides, based on the information of the attended rightward extent from the subjective midpoint. Accordingly, we used virtual reality goggles (VRG) and devised a mirror-image viewing (MV) condition that showed a full-field view based on the right visual field information to test whether healthy participants would thereby show neglect-like bisection performance. The participants were 30 healthy adults (22–37 years old; 15 women and 15 men). In this condition, 96.7% (29/30) of participants were judged to exhibit USN-like performance of line bisection, indicating the effectiveness of MV condition to simulate USN. The novelty of the present study lies in the use of a task-specific intervention of neglect-like visuospatial processing during line bisection without attempting to modify the direction of spatial attention. This approach may contribute to the understanding of the pathological visuospatial processing of USN.     

Virtual reality technology in neuropsychological testing: A systematic review

Neuropsychological testing aims to measure individuals' cognitive abilities (e.g. memory, attention), analysing their performance on specific behavioural tasks. Most neuropsychological tests are administered in the so-called ‘paper-and-pencil’ modality or via computerised protocols. The adequacy of these procedures has been recently questioned, with more specific concerns about their ecological validity, i.e. the relation between test scores observed in the laboratory setting and the actual everyday cognitive functioning. In developing more ecological tasks, researchers started to implement virtual reality (VR) technology as an administration technique focused on exposing individuals to simulated but realistic stimuli and environments, maintaining at the same time a controlled laboratory setting and collecting advanced measures of cognitive functioning. This systematic review aims to present how VR procedures for neuropsychological testing have been implemented in the last years. We initially explain the rationale for supporting VR as an advanced assessment tool, but we also discuss the challenges and risks that can limit the widespread implementation of this technology. Then, we systematised the large body of studies adopting VR for neuropsychological testing, describing the VR tools' distribution amongst different cognitive functions through a PRISMA-guided systematic review. The systematic review highlighted that only very few instruments are ready for clinical use, reporting psychometric proprieties (e.g. validity) and providing normative data. Most of the tools still need to be standardised on large cohorts of participants, having published only limited data on small samples up to now. Finally, we discussed the possible future directions of the VR neuropsychological test development linked to technological advances.     

个体自信度对双人决策的影响

群体决策是重要的社会现象, 个体自信度在群体决策中发挥了重要作用。本文开展了不同难度和信息交流方式下的双人决策实验, 通过分析自信度和个体决策以及决策调整行为的关系, 研究了个体自信度的交流对双人决策的影响。实验结果表明, 个体的自信度与选择的正确率高度正相关; 双人决策过程是个体根据对方的自信度和选择来不断调整自己的选择最终达成一致的过程, 并通过交互过程提高双人决策的正确率; 实验中双人决策的质量明显优于“自信度分享模型”和“更自信者主导决策模型”的预期结果, 表明群体决策不是通过分享自信度进行的贝叶斯优化整合过程, 也不是由更自信的个体完全主导的过程。     

虚拟路径整合的学习效应

路径整合指通过自身运动信息对自身位置进行更新的过程。本研究使用头盔式虚拟现实系统和分段式迷宫, 在两个实验中检验在同样布局的外出路径上重复地进行路径完成任务是否会改善被试的反应表现。实验1中的外出路径具有相对较简单的空间布局, 实验结果表明, 男性和女性被试均在反应时、位置误差、角度误差上表现出了学习效应, 即第二次在同样空间布局的外出路径上进行路径完成任务时的表现比第一次有了显著的改善。实验2中的外出路径具有更复杂多样化的空间布局, 而实验结果表明, 男性和女性被试均在反应时和比例位置误差上表现出了学习效应, 但是路径更复杂时要求更多次数的重复才可以提高路径整合成绩。这些研究结果为路径整合能力训练的可行性提供了初步的实证依据。     

实质取样对因果强度估计的影响

使用单个目标原因和单个效果的图形集中呈现范式协变关系探讨实质取样增量（12.5%< 50%< 87.5% <100%）对大学生被试因果强度估计的影响。实验结果显示：1）实质取样增加在Power-PC=.50和1协变关系上都导致高估计,在Power-PC=0的协变关系上导致低估计;2）相同实质取样增量对被试在Power-PC=.50（1）协变关系上强度估计的影响符合一次（二次）函数假设。结果说明高实质取样促使被试做出符合理性预期的强度估计,混合假设可以解释被试的强度估计偏离Power-PC值的现象。     

Notes for a dialogue between psychoanalysis and neuroscience1

The author postulates that the dialogue between psychoanalysis and neuroscience is based on the assumption that both deal with virtual structures. They are two facets of the same noumenal reality, but with different phenomenal realities, and it is possible to use metapsychology as a lingua franca to develop communication between the two fi elds. In the second part of the paper, the author refl ects on the results of recent neurophysiological research which seem to offer to psychoanalysis possibilities for fi nding an anatomical‐physiological correlate of some well‐known psychic phenomena and mechanisms, such as imitation, introjection, identifi cation, empathy, identity, mother‐child communication, learning, social communication and the analyst‐patient relationship. Particular neurons, called mirror neurons, have been located in the F5 area of baboons' brains. They are also present in man's brain within Broca's area. These neurons activate our motor system during both the performance of actions and the observation of actions performed by others giving rise to an automatic response, a sort of simulation or, rather, imitation, as the process is not intentional, but automatic and unaware, that is, unconscious.     

虚拟现实技术在心理治疗中的应用

虚拟现实系统具有良好的沉浸性、互动性和构想性而被广泛应用于军事、工业、建筑、教育等诸多领域。近年来,国外一些研究者将虚拟现实技术用于恐惧症、社交焦虑症、创伤后应激性障碍和厌食症等心理疾病的治疗,并取得了良好效果。本文简要介绍了国外在方面开展的主要工作,并对未来的研究趋势进行了展望。