虚拟现实技术在心理学领域的应用与展望

虚拟现实(VR)技术因其能够提高实验研究的生态效度、条件控制水平、可重复性以及避免实地操作带来的危险,被众多研究者引入心理学领域。VR技术除了被用于改良实验程序外,也广泛应用于注意、记忆和执行能力等神经心理测验评估,在恐惧症、焦虑症、创伤后应激障碍和精神分裂症等精神障碍的临床治疗中亦取得丰硕成果。未来研究可致力于改进VR技术本身存在的问题、扩大样本量并扩展研究方法和范围,为VR应用提供更可靠的信效度证据。     

权力对压力应对行为倾向的影响：认知评估的中介作用

摘 要 采用实验法探讨权力对压力应对行为的影响以及认知评估在二者关系中的作用。实验一通过回忆法操纵权力,测量被试在压力情境下的认知评估和行为倾向。结果发现,权力水平影响压力下的生理反应,高权力者产生挑战,低权力者产生威胁;认知评估在权力和压力应对行为倾向间起中介作用。实验二进一步探究了权力对压力应对行为的影响,结果发现认知评估中介权力和压力应对行为倾向,且不同权力水平者的压力应对行为存在显著差异。     

认知抑制对科学创造力和艺术创造力的影响

研究通过2个实验,考察不同高低抑制水平对科学创造力和艺术创造力的影响。通过安排不同难度的Simon任务（不一致试次占70%或10%）来消耗被试的认知资源,达到操纵被试的抑制水平,以侧抑制任务的前后测来评估被试抑制水平的变化情况,实验1和实验2分别以科学创造力测验和粘贴画任务测量被试的科学创造力和艺术创造力。结果发现,在科学创造力测验上,高抑制水平组被试的流畅性和灵活性得分显著高于低抑制水平组;在粘贴画任务中,低抑制水平组被试的创造性、可爱程度、综合印象得分以及总分均显著高于高抑制水平组。表明高认知抑制水平有利于科学创造力,低认知抑制水平有利于艺术创造力,认知抑制对科学创造力和艺术创造力的影响存在分离效应。     

基本心理能力老化的认知机制

基本心理能力老化机制是认知老化领域研究热点之一。横断研究与追踪研究表明, 感觉功能、加工速度、工作记忆等信息加工资源的衰退导致了基本心理能力的衰退。但由于相关研究不能进行因果推论, 基本心理能力老化的认知机制尚存在争论。因此本项目拟采用实验室研究和干预实验设计, 通过操纵感觉功能(知觉压力水平)、干预加工速度与工作记忆, 考察基本心理能力的年龄差异的变化, 以期为认知老化理论的深化和拓展提供实验依据。     

认知年老化与执行衰退假说

在认知年老化领域,执行衰退假说是近年来新兴的一种理论。执行衰退假说在理论上具有很强的吸引力,但在实证研究中却存在很多困难,如执行功能的可分离性问题,执行功能测量的信度和效度问题,以及执行功能与加工速度的关系问题。目前,该领域研究的焦点是：在行为学水平上,控制一般性因素（加工速度）后,执行功能是否仍对认知年老化起重要的中介作用;在神经水平上,执行（额叶）功能随龄的变化情况,以及在认知年老化过程中,额叶在大脑功能重组中扮演的角色。最终实现对认知年老化的理解,需要将认知功能与大脑结构联系起来;既看到广泛存在的共同的基本机制,又不能忽略不同认知结构的选择性变化。     

执行功能可分离性及与年龄关系的潜变量分析

应用潜变量分析研究抑制优势反应、记忆刷新和注意转换三种执行功能的可分离性,以及与年龄的关系。被试为18~85岁的健康成年人142名,完成九项执行功能任务。结果显示：本研究设计的九项执行功能任务有较好的信度;验证性因子分析显示,九项任务与对应执行功能间的因子负荷较高（汇聚性效度好）,而不同执行功能间的相关较低（鉴别性效度好）;在此基础上建立了三种执行功能及其与年龄关系的潜变量分析模型。研究结果表明,执行系统不是单一的认知结构,可以分离为若干相对独立的执行加工过程。     

虚拟现实技术应用于神经心理评估的研究概述

传统神经心理评估的实验控制和生态效度的平衡问题日益受到研究人员的关注,而新兴的虚拟现实(Virtual Reality,VR)技术为问题的改善带来了希望,它不仅可以模拟现实环境并支持被试的直接交互,而且能对传统测试进行再现和扩展。它所形成的评估系统能对刺激的内容和表象、任务的复杂度和被试的响应进行灵活控制,所获取的信息更丰富、准确。在初步评估注意过程(注意、单侧空间忽略)、记忆(前瞻记忆、情景记忆、空间记忆、地形定向)和执行功能方面已获得了令人满意的效果。然而目前VR评估的应用仍存在技术和设备方面的不足,以及对评估者和被试不同操作要求的局限,因此今后除了要规范化现有VR评估系统,还应该进一步发展基础条件来推动系统的广泛应用。     

初中生社会技能角色扮演测试的多因素实验研究

以初中生为被试,以社会技能为目标行为,对角色扮演测试进行研究,探讨其影响因素和外在效度。研究采用２×２×２三因素实验设计,通过现场测试、刺激控制和问卷调查相结合的实验方法,着重探讨了角色扮演情境内容、测试指导语、实验助手的交往方式三个因素对被试行为的影响,证明了角色扮演行为随情境操纵的变化而变化,并发现在采用个体化的测试情境、低水平要求的指导语及非结构化的交往方式的情况下,外在效度最高。另外,多元回归统计分析表明被试性别、已有水平等对角色扮演行为水平也有影响。     

视觉表象眼动的变化：知识还是技能表征的差异？

以表象看到一个运动员完成三级跳远项目为实验任务,对表象任务的信息通达水平、眼动注视点的活动位置和被试对三级跳远项目的知识水平和技能水平进行系统的操纵,通过2个实验探讨了视觉表象眼动的变化是基于知识学习表征差异还是技能训练表征差异的问题。实验1以没有三级跳远运动专业技能知识且对该运动的认知水平也较低的大学生为被试,结果表明,在完成高信息通达水平的表象任务时,注视点需要较短的持续时间,但眼跳距离会增大,眼跳频率会变低;实验2对表象任务的知识学习表征水平和技能训练表征水平进行操纵,分别以对实验任务进行过知识学习和专业技能训练的人为被试,结果表明,随着被试知识习得水平和技能水平表征能力的提高,不同表象任务信息通达水平间的眼动差异将消失,但知识学习和技能表征的差异在平均眼跳时间上有差异,技能训练型的被试其平均眼跳时间要短于知识学习型被试,达到临界水平显著,注视点平均持续时间和平均眼跳距离等均没有差异。     

侗歌经验对侗族中学生执行功能的影响

音乐训练对认知能力具有广泛的促进效应。本研究结合执行功能的三个成分(抑制控制、工作记忆和认知灵活性), 在我国民族音乐背景下, 匹配实验任务的视觉和听觉形式, 探讨侗歌经验对侗族中学生执行功能的影响。结果表明, 侗歌组被试在抑制能力和刷新能力上显著好于侗族非侗歌组被试和汉族被试, 这一优势在视觉任务中和听觉任务中均存在, 说明侗歌经验产生的认知优势具有跨感觉通道的普遍性。侗歌组被试和侗族非侗歌组被试的转换能力差异不显著。侗族非侗歌组被试的抑制能力和转换能力好于汉族被试, 这体现了语言和音乐的交互作用。     

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.     

Cognitive estimations as a measure of executive dysfunction in childhood epilepsy

Children and adolescents with epilepsy are known to demonstrate executive function deficits. Despite prior work that has shown that cognitive estimation tasks are sensitive to executive dysfunction in children, such tasks have not been studied in children with epilepsy. This is particularly important given the fact that executive tasks have heretofore shown poor ecological validity, and it has been speculated that estimation tasks may show stronger ecological validity than other executive tests. One hundred and thirteen clinically referred children and adolescents with epilepsy were included. The Biber Cognitive Estimations Test was sensitive to cognitive dysfunction, with about half showing impairments on this task in comparison to age-matched normative data; the most frequently impaired subscales were quantity estimation and time estimation. Moreover, the Biber Cognitive Estimation Test showed moderate correlations with not only overall intellectual functions and academic achievement but also other commonly administered tests of executive functions, including digit span, Trailmaking, and the Tower of London but not with the contingency naming test. Cognitive estimations were also modestly correlated with age of epilepsy onset but not other epilepsy-severity variables such as number of antiepilepsy drugs (AEDs) or seizure frequency. Unfortunately, the hypothesis that the Biber Cognitive Estimation Test would show strong ecological validity was not supported, as it showed weak relations with parent-reported executive function deficits. The significance and limitations of this investigation are discussed.     

Virtual reality in brain damage rehabilitation: review.

Given the high incidence of brain injury in the population, brain damage rehabilitation is still a relatively undeveloped field. Virtual reality (VR) has the potential to assist current rehabilitation techniques in addressing the impairments, disabilities, and handicaps associated with brain damage. The main focus of much of the exploratory research performed to date has been to investigate the use of VR in the assessment of cognitive abilities, but there is now a trend for more studies to encompass rehabilitation training strategies. This review describes studies that have used VR in the assessment and rehabilitation of specific disabilities resulting from brain injury, including executive dysfunction, memory impairments, spatial ability impairments, attention deficits, and unilateral visual neglect. In addition, it describes studies that have used VR to try to offset some of the handicaps that people experience after brain injury. Finally, a table is included which, although not an exhaustive list of everything that has been published, includes many more studies that are relevant to the use of VR in the assessment and rehabilitation of brain damage. The review concludes that the use of VR in brain damage rehabilitation is expanding dramatically and will become an integral part of cognitive assessment and rehabilitation in the future.     

Assessment and development of executive function (EF) during childhood.

This review paper outlines the issues associated with the assessment of executive function (EF) in children and adolescents, and describes the developmental profile of executive processes across childhood. At the outset, EF is defined, and cognitive and behavioral impairments associated with executive dysfunction (EDF) are described. A developmental model of EF is proposed incorporating four discrete but inter-related executive domains (attentional control, cognitive flexibility, goal setting, and information processing) which operate in an integrative manner to enable "executive control". Characteristics that constitute traditional EF measures are discussed, as are the problems associated with test interpretation. The ecological validity of EF tests and neuropsychological assessment procedures are examined, and adjunct methods of measurement are presented to enable a more comprehensive and valid assessment of EF. Based on developmental and normative studies, the maturation of executive domains is mapped. Attentional control appears to emerge in infancy and develop rapidly in early childhood. In contrast, cognitive flexibility, goal setting, and information processing experience a critical period of development between 7 and 9 years of age, and are relatively mature by 12 years of age. A transitional period is thought to occur at the beginning of adolescence, and shortly after "executive control" is likely to emerge. In order to confirm our current understanding of EF development and further enhance our understanding of brain-behavior relationships, longitudinal studies incorporating structural and functional neuroimaging are required.     

Incremental Validity of Leaderless Group Discussion Ratings Over and Above General Mental Ability and Personality in Predicting Promotion

Leaderless group discussions (LGDs) constitute one of the oldest assessment center exercises. In recent times, their added value has sometimes been questioned in light of trends to streamline assessment centers. The purpose of the present study is to examine the incremental validity of LGD ratings over cognitive ability scores and personality ratings for the prediction of extrinsic career success (i.e., promotion speed and number of promotions). We investigated this issue in the context of the promotion of French naval officers (N = 93) in an academy for high‐level executive positions over a 10‐year period. Results indicated that LGD ratings accounted for incremental variance in the prediction of promotion criterion measures, beyond cognitive ability and personality test scores. These results confirm that LGD ratings provide a unique contribution to the prediction of extrinsic career success in high‐level executive positions.     

Assessment and Development of Executive Function (EF) During Childhood

This review paper outlines the issues associated with the assessment of executive function (EF) in children and adolescents, and describes the developmental profile of executive processes across childhood. At the outset, EF is defined, and cognitive and behavioral impairments associated with executive dysfunction (EDF) are described. A developmental model of EF is proposed incorporating four discrete but inter-related executive domains (attentional control, cognitive flexibility, goal setting, and information processing) which operate in an integrative manner to enable “executive control”. Characteristics that constitute traditional EF measures are discussed, as are the problems associated with test interpretation. The ecological validity of EF tests and neuropsychological assessment procedures are examined, and adjunct methods of measurement are presented to enable a more comprehensive and valid assessment of EF. Based on developmental and normative studies, the maturation of executive domains is mapped. Attentional control appears to emerge in infancy and develop rapidly in early childhood. In contrast, cognitive flexibility, goal setting, and information processing experience a critical period of development between 7 and 9 years of age, and are relatively mature by 12 years of age. A transitional period is thought to occur at the beginning of adolescence, and shortly after “executive control” is likely to emerge. In order to confirm our current understanding of EF development and further enhance our understanding of brain-behavior relationships, longitudinal studies incorporating structural and functional neuroimaging are required.     

Understanding Executive Control in Autism Spectrum Disorders in the Lab and in the Real World

In this paper, we review the most recent and often conflicting findings on conventional measures of executive control in autism spectrum disorders. We discuss the obstacles to accurate measurement of executive control, such as: its prolonged developmental trajectory; lack of consensus on its definition and whether it is a unitary construct; the inherent complexity of executive control; and the difficulty measuring executive-control functions in laboratory or clinical settings. We review the potential of an ecological-validity framework to address some of these problems, and describe new tests claiming verisimilitude, or close resemblance to “real life” demands. We also review the concept of veridicality, which allows for the measurement of the ecological validity of any task, and discuss the few studies addressing ecological validity in individuals with autism. Our review suggests that a multi-source approach emphasizing veridicality may provide the most comprehensive assessment of executive control in autism.