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为了探寻弈棋风格大局观维度存在的生理证据,研究使用1.5T功能型磁共振仪,采用被试间设计,记录并比较不同风格的围棋业余棋手在思考围棋问题时脑区激活情况。结果表明:大局观高分组被单独激活的Brodmann区有右BA1、右BA6、右BA17、右BA19,而低分组被试被单独激活的Brodmann区是左BA7、左BA9、右BA25、右BA37、右BA46、左BA47。这种差异为弈棋风格大局观维度的存在提供了生理性证据。 相似文献
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通过《团体图形镶嵌测验》从201名大学生中筛选出48名具有典型场独立与场依存特征的大学生为被试,采用Eyelink 2000型眼动仪,研究探讨不同认知风格者注视罗夏墨迹图时的眼动规律及其反应特点。结果显示:(1)在自由反应阶段,场依存者眼跳次数少,平均眼跳距离大,而反应时和注视次数都较少;场独立者反之。且图片颜色对被试反应有显著影响。彩色图片眼跳次数多,平均眼跳距离小,而反应时和注视次数都较多;非彩色图片反之。(2)在提问阶段,场认知风格在该阶段主效应显著,且一般眼动指标的规律与自由反应阶段的一致。有色彩反应(C)的反应时、注视次数和眼跳次数均显著大于没有色彩反应(UC)的。(3)反应规律:不同认知风格被试的运动反应次数差异显著,场独立者多于场依存者。 相似文献
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采用ASL—4200R型眼动仪,对28名小学五年级学生阅读图文课文的眼动过程进行考察,结果表明:(1)不同呈现方式课文的阅读成绩具有非常显著差异,图文课文化于文字课文;(2)不同呈现方式课文的注视次数、注视频率、眼跳距离和回视次数存在显著差异,图文课文显著少于或低于文字课文,而注视点持续时间则相反;(3)不同难度课文的眼动指标,文字课文只有注视次数一项眼动指标具有显著差异,而图文课文有注视频率和回视次数二项眼动指标具有显著差异。 相似文献
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阅读研究中的主要眼动指标评述 总被引:2,自引:0,他引:2
眼跳和注视是阅读过程中的两种基本眼动现象.目前在对阅读的眼动研究中分析指标主要包括两类,一类是与眼睛何时移动有关的时间维度的眼动指标,具体包括以字或词为兴趣区的眼动指标,如单一注视时间、首次注视时间、第二次注视时间、凝视时间、离开目标后的首次注视时间、回视时间和总注视时间等,以及以短语或句子为兴趣区的眼动指标,如第一遍阅读时间、向前阅读时间、第二遍阅读时间、回视路径阅读时间、重读时间等.另一类是与眼睛移动位置有关的空间维度的眼动指标,具体包括眼跳距离、注视位置、注视次数、跳读率、再注视比率和回视次数等.在使用眼动指标时,需要注意眼动指标的分类、原始数据的删除标准以及眼动指标的选择等问题. 相似文献
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大学生工作记忆容量对图形推理影响的眼动研究 总被引:1,自引:0,他引:1
采用眼动技术,选取瑞文图形推理测验作为实验材料,探讨工作记忆对于图形推理过程的影响。实验为2(工作记忆容量:高、低)×2(性别:男、女)×3(题目难度:高、中、低)的混合实验设计。以扫视时间、眼跳幅度、注视次数、扫视次数、瞳孔直径为因变量指标。实验结果表明:第一,不同性别大学生进行图形推理过程的眼动模式有一定差异,但这种差异并非由工作记忆差异所导致,而是图形推理策略不同所引起;第二,工作记忆容量高低影响图形推理过程,由于工作记忆影响注意资源分配,从而工作记忆容量高低不同会导致采用不同的策略进行图形推理,不仅影响工作记忆推理过程,也导致推理成绩的差异。这些结果能为学生选择适合自己的学习策略、因材施教以及考试测评提供依据。 相似文献
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Word frequency and orthographic familiarity were independently manipulated as readers' eye movements were recorded. Word frequency influenced fixation durations and the probability of word skipping when orthographic familiarity was controlled. These results indicate that lexical processing of words can influence saccade programming (as shown by fixation durations and which words are fixated). Orthographic familiarity, but not word frequency, influenced the duration of prior fixations. These results provide evidence for orthographic, but not lexical, parafoveal-on-foveal effects. Overall, the findings have a crucial implication for models of eye movement control in reading: There must be sufficient time for lexical factors to influence saccade programming before saccade metrics and timing are finalized. The conclusions are critical for the fundamental architecture of models of eye movement control in reading -- namely, how to reconcile long saccade programming times and complex linguistic influences on saccades during reading. 相似文献
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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。 相似文献
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Satoshi Shioiri 《Attention, perception & psychophysics》1993,53(3):305-314
Eye movements were monitored while observers inspected photographs of natural scenes. At the end of each saccade (i.e., at the beginning of each period of steady fixation), the stimulus was replaced for a certain period of time by a uniform field (Experiment 1) or a blurred version of the stimulus scene (Experiment 2). Total fixation duration was measured as a function of the duration of the initial uniform field or the blurred image that followed the saccade. It was found that fixation duration increased proportionally with the duration of the initial replacement field, even for durations as short as 25 msec. These results suggest that the visual system uses information on the retina right after each saccade is completed and that the blurred, low-resolution information used in Experiment 2 (cutoff frequency of 0.8 cpd) is not sufficient for the requirements of picture processing in this task. 相似文献
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Three experiments examined saccade programming during short duration fixations between 50 ms and 150 ms. In experiment 1, subjects copy typed text, in experiment 2, subjects read and executed a letter detection task, and in experiment 3, subjects read for comprehension only. Fixation duration had no effect on the size of the departing saccade in the copy typing task; however, saccades leaving short duration fixations were larger than saccades leaving all other fixation durations in the letter detection task and smaller than saccades leaving long fixation durations in the standard reading task. Within Morrison's (1984) model, these results imply, first, that consecutive shifts of attention during a fixation can take different directions and, second, that successive shifts of attention during a fixation support different purposes. Within Fischer's (1986, in press) model, the results imply that the engagement/disengagement of attention and saccade programming do not constitute independent events. 相似文献
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Eye movements depend on cognitive processes related to visual information processing. Much has been learned about the spatial selection of fixation locations, while the principles governing the temporal control (fixation durations) are less clear. Here, we review current theories for the control of fixation durations in tasks like visual search, scanning, scene perception, and reading and propose a new model for the control of fixation durations. We distinguish two local principles from one global principle of control. First, an autonomous saccade timer initiates saccades after random time intervals (local-I). Second, foveal inhibition permits immediate prolongation of fixation durations by ongoing processing (local-II). Third, saccade timing is adaptive, so that the mean timer value depends on task requirements and fixation history (Global). We demonstrate by numerical simulations that our model qualitatively reproduces patterns of mean fixation durations and fixation duration distributions observed in typical experiments. When combined with assumptions of saccade target selection and oculomotor control, the model accounts for both temporal and spatial aspects of eye movement control in two versions of a visual search task. We conclude that the model provides a promising framework for the control of fixation durations in saccadic tasks. 相似文献