EXPERIMENTAL ANALYSIS AND EXTINCTION OF SELF-INJURIOUS ESCAPE BEHAVIOR

Three studies are presented in which environmental correlates of self-injurious behavior were systematically examined and later used as the basis for treatment. In Study 1, 7 developmentally disabled subjects were exposed to a series of conditions designed to identify factors that maintain self-injurious behavior: attention contingent on self-injurious behavior (positive reinforcement), escape from or avoidance of demands contingent on self-injurious behavior (negative reinforcement), alone (automatic reinforcement), and play (control). Results of a multielement design showed that each subject's self-injurious behavior occurred more frequently in the demand condition, suggesting that the behavior served an avoidance or escape function. Six of the 7 subjects participated in Study 2. During educational sessions, “escape extinction” was applied as treatment for their self-injurious behavior in a multiple baseline across subjects design. Results showed noticeable reduction or elimination of self-injurious behavior for each subject and an increase in compliance with instructions in all subjects for whom compliance data were taken. The 7th subject, whose self-injurious behavior during Study 1 occurred in response to medical demands (i.e., physical examinations), participated in Study 3. Treatment was comprised of extinction, as in Study 2, plus reinforcement for tolerance of the examination procedure, and was evaluated in a multiple baseline across settings design. Results showed that the treatment was successful in eliminating self-injurious behavior and that its effects transferred across eight new therapists and three physicians. General implications for the design, interpretation, and uses of assessment studies are discussed.     

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.     

Définir ou détecter des pathologies ? Utilisation et interprétation des scores seuils à la lumière du débat dimensions/catégories

A number of psychometric tests are aimed at locating the performance of an individual along a continuous range that goes from normal to worrying. In a different paradigm, there are tests whose goal is to assess whether or not an individual is healthy with respect to a psychological, psychiatric or neurological pathology that is defined independently from the test itself. The former rely on a dimensional concept of psychopathologies; the latter imply a categorical concept. The former require to compare the performance of the individual to a standard sample that is representative of the general population; the latter involve a standard sample representative of the healthy population only. The former might imply the use of a cut-off score to indicate that a certain degree of rarity of the performance has been reached, while the latter must involve a cut-off score to make a decision (whether the individual belongs to the “healthy” or “pathological” category), a score that is most often set so as to control the false-positive rate in making this decision. In the former paradigm, the cut-off score defines or contributes to define the pathology. In the latter, it only helps detecting it. This article aims at making clear the difference between these two realms and highlight their practical as well as theoretical impact on psychological practice.     

艺术设计中创造性思维的fMRI研究：一项基于智能CAD的探索

本项工作尝试将人类思维的神经生物学基础研究与人工智能的研究成果相结合, 利用类比生成模型的原理, 开发了一个计算机辅助设计系统“多源类比人脸生成系统”, 并运用此平台开展了fMRI实验, 对人类大脑创造性思维的神经生物学机制进行了探索。实验采用open-ends模式下的“design task”和problem solving模式下的“control task”作为对照, 共采得15名健康成人被试的有效数据。数据结果显示design task与control task相比更为显著地激活了内侧前额叶、额中回、右侧颞上回、前扣带回、双侧海马、楔前叶这些脑区。综合以往研究推测, 内侧前额叶可能更多地与即兴自由创作中对自我信息的表征有关, 颞叶可能与不断产生和输出新颖性的观点有关, 边缘系统则可能主要与创造性活动中的动力驱动作用有关。总的来说, 创造性思维是多个脑区同时参与的高度分布式加工的结果。     

Psychiatric Diagnoses and Clinical Characteristics of Asian American Youth in Children's Services

This study examined the psychiatric diagnoses and clinical characteristics of the 981 Asian American children enrolled in the first phase of the Comprehensive Community Mental Health Services for Children and Their Families Program. Asian Americans were less likely than non- Asian Americans to receive diagnoses of depression and ADHD and more likely to receive diagnoses of anxiety and adjustment disorder. As compared to non-Asians, Asian Americans were significantly more likely to be rated with severe functional impairment in community role performance, self-harmful behavior, and thinking. There was also a trend for fewer externalizing behavior problems. Implications for research and practice are discussed.     

Use of Brief Experimental Analyses in Outpatient Clinic and Home Settings

We describe the historic and current use of brief experimental analysis procedures in outpatient clinic and home settings. We discuss some applications of the designs and suggest design modifications for improving internal validity. We describe our application of the designs to longitudinal, in-home programs for children with severe behavior disorders and demonstrate how related versions of brief experimental analysis procedures can be linked to form a more comprehensive evaluation.     

SOME FINAL,GULP, “WORDS” ON REBT,ACT &; RFT

After reviewing the target articles of this issue, Hayes and Ellis respectively see less and more possibilities for integration. This concluding article attempts to better elucidate possibilities for integration between second and third wave CBT’s, as exemplified by Rational-Emotive & Cognitive-Behavior Therapy (REBT) and Acceptance and Commitment Therapy (ACT). We suggest that if ACT is going to err, it will be in the direction of being too afraid of talk. If REBT is going to err, it will be in the direction of not being afraid enough. Address correspondence to Hank Robb, 4550 SW Kruse Way, Suite 225 Lake Oswego, OR 97035, USA.     

Adding pieces to the puzzle: a commentary

In Jensen's theme paper she did an excellent job of outlining and explaining ways in which motor developmentalists can use the tools of biomechanics and engineering to address research questions. We extend her thorough efforts in two ways. First, we highlight the communication value provided by the precision of biomechanics terminology, and second, we reinforce the need to embed motion (the kinematics and kinetics) in context and function in order to understand the complexity of behaviour. We illustrate how one biomechanical tool, mechanical models, can facilitate this and provide insight to the development of control. Copyright © 2005 John Wiley & Sons, Ltd.     

青老年组不同难度下心算活动的脑功能磁共振成像研究

应用功能磁共振成像技术研究不同心算难度下脑区的活动以及年龄的影响。14名志愿者（20～29岁青年和60～69岁老年被试各7名）参加了该实验。实验任务为2个难度水平的连续减法心算,分别为1000—3和1000—17。结果表明：（1）心算加工激活了额叶和顶叶的许多脑区;（2）大脑左半球是心算加工的优势半球,但随着心算难度加大,大脑一侧化程度下降,而年老加剧了这一趋势;（3）青年组进行简单心算（1000—3）时,额中回未见明显激活,而老年组进行简单心算时,该脑区被明显激活。总体上,额叶和顶叶在心算活动中起着重要作用,而任务难度和年龄对心算加工时脑活动的影响以额中回区最为明显。