Visual attention capacity: a review of TVA-based patient studies

Psychophysical studies have identified two distinct limitations of visual attention capacity: processing speed and apprehension span. Using a simple test, these cognitive factors can be analyzed by Bundesen's Theory of Visual Attention (TVA). The method has strong specificity and sensitivity, and measurements are highly reliable. As the method is theoretically founded, it also has high validity. TVA-based assessment has recently been used to investigate a broad range of neuropsychological and neurological conditions. We present the method, including the experimental paradigm and practical guidelines to patient testing, and review existing TVA-based patient studies organized by lesion anatomy. Lesions in three anatomical regions affect visual capacity: The parietal lobes, frontal cortex and basal ganglia, and extrastriate cortex. Visual capacity thus depends on large, bilaterally distributed anatomical networks that include several regions outside the visual system. The two visual capacity parameters are functionally separable, but seem to rely on largely overlapping brain areas.     

Toward a comprehensive view of the skills involved in word reading in Grades 4, 6, and 8

Research to date has proposed four main variables involved in reading development: phonological awareness, naming speed, orthographic knowledge, and morphological awareness. Although each of these variables has been examined in the context of one or two of the other variables, this study examines all four factors together to assess their unique contribution to reading. A sample of children in Grades 4, 6, and 8 (ages 10, 12, and 14 years) completed a battery of tests that included at least one measure of each of the four variables and two measures of reading accuracy. Phonological awareness, orthographic knowledge, and morphological awareness each contributed uniquely to real word and pseudoword reading beyond the other variables, whereas naming speed did not survive these stringent controls. The results support the sustained importance of these three skills in reading by older readers.     

轻度弱智儿童工作记忆、加工速度的实验研究

选取轻度弱智、一般智力以及智力优秀三组共288名小学生作为被试,每个被试接受三种测验,即工作记忆测验、加工速度测验、韦氏儿童智力测验中国修订版,以考察轻度弱智儿童群体在与工作记忆和加工速度相关的认知任务上的反应特征,以及轻度弱智儿童与一般儿童在这些任务上的差异。通过方差分析、聚类分析等统计方法得到以下结果：1．轻度弱智儿童和智力一般儿童在工作记忆和加工速度上有显著差异。2．轻度弱智儿童群体在各基本认知能力中可能存在的缺陷并不平衡,工作记忆较稳定地反映了该群体在智力上的缺陷,但存在一部分在加工速度上体现为正常水平的亚类群体。     

普通高校高水平运动员职业生涯规划的SWOT分析

“教体结合”模式已经成为高校高水平运动员培养和教育的重要形式,不仅有利于高水平运动员培养的可持续发展,而且有利于进一步提升校园文化内涵。但目前普遍存在的一个问题就是高水平运动员入校后,学训矛盾突出,职业生涯规划也难以开展,有待进一步探索。本文借鉴人力资源管理职业生涯规划理论和市场营销SWOT理论为基础,以SWOT分析为工具探讨如何科学实施高水平运动员职业生涯规划。     

加工速度、自我监控对认知操作的影响

本研究用认知操作的部分内容,探索了青少年在认知操作活动中年龄、自我监控、加工速度对认知操作的影响,研究发现：本研究结果表明,年龄对自我监控有显著的负效应,对认知操作有显著的正效应,自我监控对加工速度有非常显著的正效应,对认知操作有显著的负效应,加工速度对认知操作有显著的负效应。     

学习因素对语义信息加工性质的影响

本研究通过两个行为实验,采用句子核证作业,将SAD技术和范畴学习范式有机地结合起来,对语义信息加工进程以及学习因素在其中的作用进行了考察。实验一研究了熟悉性对语义信息加工的影响。结果表明,高熟悉句的部分信息积累具有离散的趋势;低熟悉句的部分信息积累是连续性的。实验二采用范畴学习。并结合SAD技术的句子核证作业．考察了在学习过程中语义加工性质的变化。结果发现：过度学习比初始学习有更多的部分信息积累,并随信号间隔的延长而逐渐增加;过度学习表现出部分信息积累的离散性变化;初始学习则表现出连续累积的趋势。说明学习确实造成了连续性加工向离散性质的过渡。     

语文学习困难儿童的工作记忆与加工速度

加工速度和工作记忆反应了不同的认知加工过程,在认知发展研究中,加工速度和工作记忆所起的作用仍存在较大的分歧.采用多因素混合实验设计,在严格控制条件下,比较了语文学习困难和控制组儿童的工作记忆和加工速度.结果发现,与控制组相比,语文学习困难儿童在工作记忆和加工速度方面均存在明显的不足,但加工速度不能解释不同能力组之间的差异,语文学习困难儿童的缺陷在于工作记忆能力的下降.工作记忆的缺陷在于言语工作记忆和中央执行功能的不足,与视空间工作记忆能力无关.语文学习困难既存在一般的工作记忆缺陷(中央执行功能)也存在特定的工作记忆(言语工作记忆)能力的不足.     

Speed analyses of stimulus equivalence.

The functional substitutability of stimuli in equivalence classes was examined through analyses of the speed of college students'' accurate responding. After training subjects to respond to 18 conditional relations, subjects'' accuracy and speed of accurate responding were compared across trial types (baseline, symmetry, transitivity, and combined transitivity and symmetry) and nodal distance (one- through five-node transitive and combined transitive and symmetric relations). Differences in accuracy across nodal distance and trial type were significant only on the first tests of equivalence, whereas differences in speed were significant even after extended testing. Response speed was inversely related to the number of nodes on which the tested relations were based. Significant differences in response speed were also found across trial types, except between transitivity and combined trials. To determine the generality of these comparisons, three groups of subjects were included: An instructed group was given an instruction that specified the interchangeability of stimuli related through training; a queried group was queried about the basis for test-trial responding: and a standard group was neither instructed nor queried. There were no significant differences among groups. These results suggest the use of response speed and response accuracy to measure the strength of matching relations.     

Occupational mobility as measured by Holland's theory of career selection

This study examined the occupational mobility of men ages 45–59 as measured by Holland's theory of career selection and its relationship to men in the work force. Stability was discussed in two distinct ways: (1) stability within a job, and (2) stability in the kind of work a man does over a career. In his research Holland concluded that Realistic and Investigative personality types would change personality type less often and have more stable job choices in comparison to other personality types. The results of this study supported these findings to some extent, but also concluded that stability in a personality type was strongly influenced by the number of jobs available in a particular personality type and the structure of the labor market demand. In addition the results showed that psychological concepts seem to be more important in changing jobs than in selecting initial jobs.     

Fear of success,sex role attitudes,and career salience and anxiety levels of college women

This study examined, for 99 female undergraduate students, both the relationship between fear of success, sex role attitudes, and career salience, and the relationship between fear of success, career salience, and trait anxiety. Fear of success was assessed using the Fear of Success Scale, while sex role attitudes were assessed using the Attitudes towards Women Scale. Career Salience was measured by the Career Salience Scale, and trait anxiety was assessed by the trait subscale of the State-Trait Anxiety Inventory. The results indicated that fear of success and sex-role attitudes, in combination, significantly predicted the level of career salience in a multiple regression analysis. The women higher in fear of success and more traditional tended to be lower in career salience. Trait anxiety levels of women did not differ significantly as a function of fear of success, career salience, or the combination of the two.