遮挡范式下对碰撞时间的估计

本文研究视觉信息对碰撞时间估计的影响。实验采用遮挡范式（ｏｃｃｌｕｓｉｏｎ ｐａｒａｄｉｇｍ）,遮挡一段固定的距离,让被试估计该段距离所用的时间。自变量为移动速度与挡板的宽度。过程：让被试看速度知觉仪上移动的红灯,估计碰撞发生时按下电键。结果表明,移动速度对时间估计的准确性影响显著,速度越大,估计准确性越高;移动速度还与挡板宽度存在交互作用,即速度快、挡板宽度时碰撞时间的估计更准确,而速度慢、挡板     

碰撞时间估计的影响因素研究

本研究采用遮挡范式,考察了专职公交车驾驶员对不同类型、速度和方向运动物体的碰撞时间(TTC)估计.结果发现,被试对不同类别和速度运动物体的TTC估计有显著差异.这表明,除了视觉信息和物理信息之外,运动物体的概念信息也是影响横向运动TTC估计的重要因素.     

背景线索对视觉客体连续性表征的影响

该研究考察了背景线索连续性对客体心理表征连续性的作用。采用2（目标客体运动形式：连续和不连续）×2（引导线索运动形式：连续和不连续）两因素被试内设计,12名被试参加实验。结果发现,目标客体在时空上不连续时,连续线索条件下对颜色变化检测反应时小于线索不连续条件;目标客体在时空上连续运动时,不连续线索条件下对目标颜色变化的检测反应时高于线索连续条件。因此,不连续背景线索对物理层面上连续运动客体的表征有干扰影响：连续背景线索对物理层面上不连续运动客体的表征有促进作用。这说明特殊的时空条件如背景线索引导会对客体表征连续性产生重要影响。     

动态和静态条件下内隐时间的存在和特征

采用2×2×2混合实验设计,使用具体和抽象两种不同性质的图形材料对动态和静态两种条件下内隐时间的存在及其特征进行了考察,结果表明：（1）动态条件下被试对抽象图形的位置偏移判断更为准确;（2）测试图形与识记图形之间位置偏移判断的错误率在测试图形与诱导图形内隐运动方向一致的条件下比不一致条件下大;（3）无论实验材料为具体图形还是抽象图形,被试对测试图形和识记图形的位置偏移判断错误率之间不存在差异。研究结果证明了内隐时间的存在,进一步探明了内隐时间具有方向性和认知不可渗透性的特点,并证明了运动范式为研究内隐时间及其特点的有效方法。     

图片部分线索效应的学习时间分配的发展

部分线索效应指让学习者学习一系列材料, 在随后的测试阶段, 给学习者提供先前所学材料的一部分作为提取线索, 让其回忆剩余的材料, 回忆成绩反而比没有提取线索时回忆成绩差的现象。通过3个实验, 以图片为实验材料, 考察了图片部分线索效应学习时间分配的发展特点。实验1考察了图片部分线索效应的边界条件, 结果发现：图片学习中, 以物体名称为线索时, 不存在部分线索效应; 而以图片为线索时, 存在部分线索效应。结果表明：跨域线索是图片部分线索效应的边界条件。实验2利用图片作线索, 考察了图片部分线索效应的发展特点, 结果发现：图片学习中, 不同年龄被试均存在部分线索效应。结果表明：年龄不是图片部分线索效应的边界条件。实验3考察不同年龄被试对部分线索消极作用的记忆监控的发展变化趋势, 结果发现：小学二年级儿童即使经过多次学习, 也不能意识到部分线索的消极作用; 小学五年级儿童经过二次学习后, 方可意识到这种消极作用, 并在部分线索条件下安排了更多的学习时间; 初二和高二年级学生经过一次学习, 即可意识到部分线索的消极作用, 他们均在部分线索条件下安排了更长的学习时间。结果表明：儿童的学习时间分配决策能力在小学二年级到小学五年级之间有一个质的提高; 与初二学生相比, 高二学生对部分线索带来的消极影响做了更多的时间补偿。     

盲人的时间水平方向隐喻的通道特异性

通过2个实验, 考察了感觉通道对盲人的时间水平方向隐喻的影响。实验1发现, 盲人只在动作水平上存在同阅读方向一致的时间水平方向隐喻, 对表征过去的词或句子按左键反应和对表征将来的词或句子按右键反应时更快, 表明盲人用于隐喻时间的空间信息是知觉性的。实验2比较了明眼人可视组被试和明眼人遮眼组被试的时间空间隐喻, 发现明眼人可视组被试只在动作水平上存在时间水平方向隐喻, 明眼人遮眼组被试只在刺激在右侧时呈现才出现动作水平的时间水平方向隐喻。综合分析表明, 盲人和明眼人可视组被试的反应更为接近, 表明盲人的时间空间隐喻未受听觉信息的影响。盲人通过运动通道获得的空间认知代偿了视觉通道信息的缺失。     

时间信息在情景模型建构中的作用

考察时间信息在情景模型建构中的作用 ,探讨被试能否把一系列相关的事实整合进基于时间组织的情景模型中。实验一、二考察明确的空间信息条件下 ,被试能否把绝对和相对的时间信息整合到情景模型中 ;实验三考察无明确的空间信息条件下 ,被试能否把绝对的时间信息整合到情景模型中。运用扇效应研究的提取干扰技术评定是否出现了整合。 3个实验结果一致表明 ,当几个相关的事实发生在相同的时间段时 ,都发现被试建构了基于时间的情景模型的证据。实验三结果同时也表明 ,无明确的空间信息的条件下 ,阅读材料中时间信息本身足以使被试建构基于时间组织的情景模型。     

外部线索对视觉客体表征连续性的影响

以往对客体连续性表征问题的研究认为,客体在物理形式上保持时空连续性是维持其相应心理表征连续性的关键。探讨了外部线索是否有助于对物理形式上存在时间或空间分离的运动客体形成的连续性表征。采用2(线索:有和无,被试间变量)×3(客体运动类型:时间分割、空间分割和时空连续,被试内变量)混合设计。结果发现:无线索下,客体在时空上保持连续性条件下的颜色变化检测绩效高于时间或空间分离的条件;有线索下,上述三种条件下的颜色变化检测绩效无差异,对时间或空间分离的客体来说,线索对颜色变化检测成绩有显著提高。这表明,外部线索可以对物理形式上时间或空间分离的运动客体形成连续心理表征,故物理形式上客体时空连续性并不一定是维持其相应心理表征连续性的关键因素。     

类比数量表征的线索:离散量还是连续量

运用Stroop研究范式,对30名成人被试的类比数量表征线索进行了研究。结果发现:在类比数量的小数和大数段上,不存在表征线索的分化;在个数任务中不出现Stroop效应,但被试在强不一致条件下的错误率显著高于强一致条件下的错误率;在累积面积任务中出现Stroop效应,且在弱不一致、强不一致条件下的反应时、错误率都显著高于强一致、弱一致条件下的反应时、错误率。以上结果表明被试在进行类比数量表征时,可以同时提取离散量线索和连续量线索,但是对离散量线索的抑制要难于对连续量线索的抑制。     

基于群体信息的行为预测机制

研究通过知觉线索(临近性和共同命运)来操纵社会群体信息,探究了人们能否以及如何利用社会群体信息进行行为预测。结果发现,当被预测对象的行为与组内其他成员一致时,被试对其行为(指向性或动作形式)进行辨别的速度,快于当此成员与组内其他成员行为不一致的条件;但,当被预测对象来自组外以及群体信息不存在时,上述效应消失。该结果提示,观察者基于知觉线索所形成的社会群体信息,建立了群体成员行为具有一致性的预期。     

Temporal-range estimation of multiple objects: evidence for an early bottleneck

When making parallel time-to-contact (TTC) estimates of two approaching objects, the two respective TTC estimates interfere with one another in an asymmetric fashion. The TTC of the later-arriving object is systematically overestimated, while the estimated TTC for the first-arriving object is as accurate as in a condition presenting only a single object. This asymmetric interference points to a processing bottleneck that could be due to early (e.g., during the estimation of the TTC from the optic flow) or late (e.g., during the timing of the response or the motor execution) constraints in the TTC estimation process. We used a Sperling-like prediction-motion task to differentiate between these two possibilities. Participants produced an absolute estimate of the TTC of only one of two objects approaching a target line. The target object to which the response was to be made was indicated by an auditory cue that occurred either at motion-onset or at the instant at which the two objects disappeared from the screen (occlusion-onset). The cue at motion-onset should disengage visual processing of the irrelevant stimulus. The cue at occlusion-onset, in contrast, requires visual processing of both relevant and irrelevant stimulus until occlusion. A single-object condition was introduced as a control condition. Results show symmetric interference in the motion-onset condition. In the occlusion-onset condition however, the results were congruent with asymmetric interference. Thus, the processing bottleneck in TTC estimation is originating at the earlier stages.     

遮挡范式下运动速度和方向对碰撞时间估计绩效指标的影响

为探索运动速度和方向对碰撞时间（TTC）估计的影响,采用3运动速度×4运动方向的双因素设计开展了实验研究。结果发现,在相对慢速条件下,受试者TTC估计的准确性显著差于相对中速和相对快速条件;仅在相对慢速条件下受试者对竖直方向的TTC估计准确度显著差于水平方向、低估TTC的比例显著高于高估TTC的比例。结果表明,运动速度对TTC估计绩效指标的影响相对较强,运动方向对其影响相对较弱;两个因素的影响存在交互作用。     

Estimating the relative weights of visual and auditory tau versus heuristic-based cues for time-to-contact judgments in realistic,familiar scenes by older and younger adults

Estimating time to contact (TTC) involves multiple sensory systems, including vision and audition. Previous findings suggested that the ratio of an object’s instantaneous optical size/sound intensity to its instantaneous rate of change in optical size/sound intensity (τ) drives TTC judgments. Other evidence has shown that heuristic-based cues are used, including final optical size or final sound pressure level. Most previous studies have used decontextualized and unfamiliar stimuli (e.g., geometric shapes on a blank background). Here we evaluated TTC estimates by using a traffic scene with an approaching vehicle to evaluate the weights of visual and auditory TTC cues under more realistic conditions. Younger (18–39 years) and older (65+ years) participants made TTC estimates in three sensory conditions: visual-only, auditory-only, and audio–visual. Stimuli were presented within an immersive virtual-reality environment, and cue weights were calculated for both visual cues (e.g., visual τ, final optical size) and auditory cues (e.g., auditory τ, final sound pressure level). The results demonstrated the use of visual τ as well as heuristic cues in the visual-only condition. TTC estimates in the auditory-only condition, however, were primarily based on an auditory heuristic cue (final sound pressure level), rather than on auditory τ. In the audio–visual condition, the visual cues dominated overall, with the highest weight being assigned to visual τ by younger adults, and a more equal weighting of visual τ and heuristic cues in older adults. Overall, better characterizing the effects of combined sensory inputs, stimulus characteristics, and age on the cues used to estimate TTC will provide important insights into how these factors may affect everyday behavior.     

Scaling Judgments of Lifted Weight: Lifter Size and the Role of the Standard

Animals generally seek to avoid potentially harmful collisions. To perform successful avoidance, actors must correctly perceive the approach of an object and produce an appropriate motor response. Objects can approach from any part of the visual field, but avoidance skills are particularly relevant when threatening approaches occur in peripheral vision. This type of behavior has so far received little attention. Stoffregen and Riccio (1990) found that participants are sensitive to visually simulated impending collision at 0 or 90°. However, motor behavior produced in response to a real object approaching at various angles of eccentricity and at various speeds has not been investigated.

In this study, participants were asked to dodge a ball approaching at 0, 20, 40, 60, or 80° of eccentricity. The ball was travelling at a constant speed of 1.0, 1.5, or 2.0 m/sec. Results showed that time to contact (TTC) at initiation of the avoidant response was similar for 0 and 20° but increased from 20 to 80°. Angle of approach had no effect on participants' movement velocity. Ball speed had an effect on both variables. TTC decreased and participants' movement velocity increased with eccentricity. No interaction was observed between ball speed and eccentricity. These results show that a successful motor response to impending physical collision is possible across a wide range of approach eccentricities. It appears that the speed of the approach was accurately perceived. The speed of avoidant responses was consistent, suggesting that intensity coupling, that is, a coupling of movement velocity with stimulus speed, was not affected by the eccentricity.     

视觉与听觉情绪信息关系判断中的交互作用

通过要求被试判断同时呈现的视听信息情绪效价的关系,考察视听情绪信息整合加工特点。实验一中词汇效价与韵律效价不冲突,实验二中词汇效价与韵律效价冲突。两个实验一致发现当面孔表情为积极时,被试对视听通道情绪信息关系判断更准确;实验二还发现,当面孔表情为消极时,相对于韵律线索,被试根据语义线索对视听信息关系判断更迅速。上述结果说明视听信息在同时呈现时,视觉信息可能先行加工,并影响到随后有关视听关系的加工。     

Visual orienting in response to attentional cues: Spatial correspondence is critical,conscious awareness is not

Three experiments examined visual orienting in response to spatial precues. In Experiments 1 and 2, attentional effects of central letters were stimulus driven: Orienting was dependent on the spatial layout of the cue display. When there were no correspondences between spatial features of the cue display and target location, attentional effects were absent, despite a conscious intention to orient in response to the symbolic information carried by the cue letters. In Experiment 3 clear orienting effects were observed when target location corresponded with spatial features of the cue display, but the magnitude of these effects was unaffected by whether participants were aware or unaware of the cue–target relationship. These findings are consistent with the view that (1) spatial correspondences between cues and targets are a critical factor driving visual orienting in cueing paradigms, and (2) attentional effects of spatial precues are largely independent of participants’ conscious awareness of the cue–target relationship.     

产品空间位置、价格音节长度对消费者价格感知的影响

本研究采用实验法考察了视听单通道及双通道下产品空间位置与价格音节长度对消费者价格感知的潜在影响。结果发现,呈现在空间右侧以及以较长音节播放的产品使得被试的价格感知升高;短音节条件下,个体对空间右侧产品的价格感知显著高于空间左侧,长音节条件下两侧则无显著差异;相对于单通道刺激呈现,视听通道呈现信息一致时出现信息冗余效应,个体判断的速度更快,验证了共激活模型假设,视听不一致条件下的速度降低则支持了预测编码模型。     

产品空间位置、价格音节长度对消费者价格感知的影响

本研究采用实验法考察了视听单通道及双通道下产品空间位置与价格音节长度对消费者价格感知的潜在影响。结果发现,呈现在空间右侧以及以较长音节播放的产品使得被试的价格感知升高;短音节条件下,个体对空间右侧产品的价格感知显著高于空间左侧,长音节条件下两侧则无显著差异;相对于单通道刺激呈现,视听通道呈现信息一致时出现信息冗余效应,个体判断的速度更快,验证了共激活模型假设,视听不一致条件下的速度降低则支持了预测编码模型。     

Working memory can enhance unconscious visual perception

We demonstrate that unconscious processing of a stimulus property can be enhanced when there is a match between the contents of working memory and the stimulus presented in the visual field. Participants first held a cue (a colored circle) in working memory and then searched for a brief masked target shape presented simultaneously with a distractor shape. When participants reported having no awareness of the target shape at all, search performance was more accurate in the valid condition, where the target matched the cue in color, than in the neutral condition, where the target mismatched the cue. This effect cannot be attributed to bottom-up perceptual priming from the presentation of a memory cue, because unconscious perception was not enhanced when the cue was merely perceptually identified but not actively held in working memory. These findings suggest that reentrant feedback from the contents of working memory modulates unconscious visual perception.