Extending Fitts' law to a three-dimensional pointing task

An attempt was made to extend Fitts' law to a three-dimensional movement (pointing) task to enhance its predictive performance in this domain. An experiment was conducted in which 10 subjects performed three-dimensional pointing movements under the manipulation of target size, distance to target and direction to target. As expected, the duration of these three-dimensional movements was rather variable and affected markedly by direction to target. As a result, the variance in the movement times produced was not satisfactorily explained by the conventional Fitts' model. The conventional model was extended by incorporating a directional parameter into the model. The extended model was shown to better fit the data than the conventional Fitts' model, both in terms of r(2) and the standard error of the residual between the measured movement time and the value predicted by model fit.     

关于现代中医学研究的几点思考

以中医学的研究目的为线索,从中医学研究的历史观、现代中医研究的得失观、今后中医研究应当明确的几个问题的发展观三个方面对中医的研究目的进行了探讨,提出今后中医药研究应当明确的问题有：否定是中医学研究的突破口;政策指导是中医学研究的保障;求实是中医学研究的灵魂;研究成果向临床实践转化是中医学研究的生命。     

和而不同,相辅相成——制度与道德相关性的哲学辨析

在社会发展实践中,制度与道德之间有着相互交叉、相互促进、相互转化的错综复杂的关系。制度的生成、演化、运行背后有着强烈的道德意蕴,道德本身所具有的规范性也不可避免地体现出制度的色彩。制度的道德依托使得制度的价值指向更加积极和明确,道德的制度支持则会促进道德的有效实现和践履。但制度和道德毕竟是各自独立的范畴,有着各自内涵的确定性,不能不适当地淡化两者之间的差别,两者之间是互补而不是替代的关系。     

方位和视空间工作记忆广度对空间情境模型更新的影响

该研究采用混合实验设计,以含有空间信息的语篇为实验材料,选取32名不同视空间工作记忆广度的大学生作为被试,考察方位和视空间工作记忆广度对空间情境模型更新的影响。研究发现:方位对空间情境模型更新的影响是显著的,视空间工作记忆广度对模型更新后的左右方位的判断有显著影响。研究验证了方位效应的稳定性,发现了视空间工作记忆广度对空间情境模型更新的影响。     

Trained interpretive bias and anxiety

The relationship between anxiety and interpretive bias has been studied extensively, but the causal direction of this relationship remains largely unexplored. Do negative interpretations cause anxiety or is anxiety the cause of negative interpretations? Or are the two mutually reinforcing? The present study addressed this issue by experimentally inducing either a negative or a positive interpretive bias using Mathews and Mackintosh' [(2002). Induced emotional interpretation bias and anxiety. Journal of Abnormal Psychology, 109, 604-615] training paradigm and then examining its impact on state anxiety and anxiety vulnerability. In addition, it was investigated as to whether the interpretive bias was trained implicitly. Results indicated that style of interpreting could be manipulated. That is, when confronted with ambiguous information after the training, participants (n=118) interpreted this information congruent with their (positive or negative) training condition. Data on the issue of implicitness showed that participants tended to be explicitly aware of the valence of their training stimuli. Effects of trained interpretive bias on anxiety were only marginal and absent on anxiety vulnerability. It appears that interpretive bias can be trained reliably, but its effects on mood and vulnerability require further explanation.     

基于YAH（You—Are-Here）地图定向中的方位效应

目的：研究基于YAH地图进行方位判断时是否存在方位效应及其表现形式。方法：90名被试分为三组参加三个被试内设计实验,实验一为基于YAH地图的绝对朝向判断,实验二为基于YAH地图的相对方位判断,实验三为不同绝对朝向条件下（失匹配）的相对方位判断。结果：绝对朝向判断中存在绝对朝向效应及北优势效应,反应时上表现为“0°〈（90°／180°／270°）〈（45°／135°／225°／315°）”;相对方位判断中存在相对方位效应,表现为反应时“（0°／90°／180°／270°）〈（45°／135°／225°／315°）”;失匹配条件下相对方位效应表现为“0°〈（90°／180°／270°）〈（45°／／315°）〈（135°／225°）”,相对方位效应模式不受绝对朝向影响。结论：基于YAH地图定向存在绝对朝向效应及相对方位效应,相对方位效应不受绝对朝向的影响。     

Reference,perception, and attention

I examine John Campbell’s claim that the determination of the reference of a perceptual demonstrative requires conscious visual object-based selective attention. I argue that although Campbell’s claim to the effect that, first, a complex binding parameter is needed to establish the referent of a perceptual demonstrative, and, second, that this referent is determined independently of, and before, the application of sortals is correct, this binding parameter does not require object-based attention for its construction. If object-based attention were indeed required then the determination of the referent would necessarily involve the application of sortal concepts, since object-based attention initiates top-down cognitive effects on visual processing. I also examine Mohan Matthen’s claim that reference to objects is established only through the visual processing in the dorsal visual stream and argue that although it is true that processing in the dorsal stream can determine reference, a thesis that goes against Campbell’s view that the determination of the referent requires conscious attention, processing along the ventral visual stream can also establish the reference of perceptual demonstratives. It also claim that Matthen’s account of dorsal processing underestimates the kind of information processed along the dorsal stream and this has some implications regarding perceptual demonstratives reference fixing.

视觉搜索任务中直视探测优势的眼动研究

已有研究发现在视觉搜索任务中对直视的探测比斜视更快且更准确, 该现象被命名为“人群中的凝视效应”。大多数研究者将该效应的产生归因于直视会捕获更多的注意。然而, 直视条件下对搜索项的匹配加工更容易也有可能导致对直视的探测比斜视快。此外,已有研究还发现头的朝向会影响对注视方向的探测, 但对于其产生原因缺乏实验验证。本研究采用视觉搜索范式, 运用眼动技术, 把注视探测的视觉搜索过程分为准备阶段、搜索阶段和反应阶段, 对这两个问题进行了探讨。结果显示：对直视的探测优势主要表现在搜索阶段和反应阶段; 在搜索阶段直视的探测优势获益于搜索路径的变短和分心项数量的变少以及分心项平均注视时间的变短; 头的朝向仅在搜索阶段对注视探测产生影响。该结果表明, 在直视探测中对搜索项的匹配加工比在斜视探测中更容易也是导致“人群中的凝视效应”的原因之一; 头的朝向仅仅影响了对注视方向的搜索并没有影响对其的确认加工。