Same items, different order: effects of temporal variability on infant categorization

How does variability between members of a category influence infants’ category learning? We explore the impact of the order in which different items are sampled on category formation. Two groups of 10-months-olds were presented with a series of exemplars to be organized into a single category. In a low distance group, the order of presentation minimized the perceptual distance between consecutive exemplars. In a high distance group, the order of presentation maximized the distance between successive exemplars. At test, only infants in the High Distance condition reliably discriminated between the category prototype and an atypical exemplar. Hence, the order in which infants learnt about the exemplars impacted their categorization performance. Our findings demonstrate the importance of moment-to-moment variations in similarity during infants’ category learning.     

Development of sensitivity to spacing versus feature changes in pictures of houses: Evidence for slow development of a general spacing detection mechanism?

Adults are expert at recognizing faces, in part because of exquisite sensitivity to the spacing of facial features. Children are poorer than adults at recognizing facial identity and less sensitive to spacing differences. Here we examined the specificity of the immaturity by comparing the ability of 8-year-olds, 14-year-olds, and adults to discriminate houses differing in the spacing between features versus those differing in the shape of the features themselves. By 8 years of age, children were more accurate for discriminations involving the feature set compared with the spacing set, and the difference in accuracy compared with adults was greater for the spacing set than for the feature set. Importantly, when sets were matched in difficulty for adults, this greater immaturity on the spacing set than on the feature set remained. The results suggest that, at least by age 8, immaturities in sensitivity to the spacing of features may be related to immaturities in general perceptual mechanisms rather than face-specific mechanisms.     

目标词效价对思维压制即刻激活效应的影响

思维压制指的是个体有意识、有目的地将某一目标思维从意识中移除的心理过程。压制某目标思维会产生矛盾效应,即试图压制反而会激活被压制目标。本研究采用思维压制的即刻测量(online measure)范式,通过两个实验对压制是否会产生即刻激活效应(immediate enhancement effect)以及目标词效价如何影响该效应进行了检验。结果发现:压制负性词时出现了即刻激活效应,而压制正性词时并未出现上述效应。由此推论,被压制目标词的威胁性,可能是影响即刻激活效应是否出现的一个因素。     

情绪调节对工作记忆的影响

本研究采用实验室研究方法,以情绪调节策略中的认知重评和表达抑制为自变量,以工作记忆绩效和情绪自评差异为因变量,旨在探讨不同的情绪调节策略对工作记忆的影响。结果表明:负性情绪使工作记忆绩效降低;通过情绪调节,可以改变负性情绪对工作记忆的影响效果;不同情绪调节策略对工作记忆影响效果不同:认知重评缓解负性情绪下工作记忆绩效的下降,表达抑制加剧负性情绪下工作记忆绩效的下降。     

Exploring the effects of similarity on mapping spatial relations

Solving a map task requires transferring information acquired in one spatial context to another context, an ability that marks an important step in cognitive development. This study investigated how preschoolers’ mapping performance was affected by the extent of similarity between spaces. Whereas prior work examined effects of similarity in tasks involving matching individual objects, our tasks required considering spatial relations among objects. We found that the accuracy of mapping between two spaces with somewhat different perceptual features was higher than the accuracy of mapping between spaces with identical features. Yet, a further increase in differences between the two spaces had a detrimental effect on mapping. The results suggest that some degree of similarity between spaces is beneficial to children’s ability to transfer relational information. However, when the spaces have the same surface features, it may draw children’s attention to individual objects and inhibit their ability to focus on common relations across contexts.     

Retrospective revaluation effects following serial compound training and target extinction

Using a conditioned suppression task, two experiments examined retrospective revaluation effects after serial compound training in a release from overshadowing design. In Experiment 1, serial X → A+ training produced suppression to target A, which was enhanced when preceded by feature X, whereas X by itself elicited no suppression. Subsequent A− presentations extinguished responding to A, but had no effect on either responding to X → A or X alone. However, the addition of A− trials did enhance the ability of feature X to elicit suppression to a novel target, B, suggesting retrospective revaluation of X’s properties. Experiment 2 showed that the enhanced transfer effect, observed in Experiment 1, was independent of the training history of the target (B− or Y → B+/B−). Together, these results suggest that feature X did not retrospectively acquire excitatory strength or occasion setting power, but rather a generalized ability to increase responding to any other cue.     

The integration of temporally shifted visual feedback in a synchronization task: The role of perceptual stability in a visuo-proprioceptive conflict situation

The present study examined whether the beneficial role of coherently grouped visual motion structures for performing complex (interlimb) coordination patterns can be generalized to synchronization behavior in a visuo-proprioceptive conflict situation. To achieve this goal, 17 participants had to synchronize a self-moved circle, representing the arm movement, with a visual target signal corresponding to five temporally shifted visual feedback conditions (0%, 25%, 50%, 75%, and 100% of the target cycle duration) in three synchronization modes (in-phase, anti-phase, and intermediate). The results showed that the perception of a newly generated perceptual Gestalt between the visual feedback of the arm and the target signal facilitated the synchronization performance in the preferred in-phase synchronization mode in contrast to the less stable anti-phase and intermediate mode. Our findings suggest that the complexity of the synchronization mode defines to what extent the visual and/or proprioceptive information source affects the synchronization performance in the present unimanual synchronization task.     

Representation and aspectual shape

One of the most significant characteristics of intentional states is the fact that they represent their intentional objects under selective aspects (or modes of presentation); that is, that they manifest an aspectual shape (Searle, 1992). Surprisingly however, although this remarkable feature is widely recognized little has been done to explain what makes representation aspect-relative in the first-place. In this article I attempt to outline an answer to this question. I begin with a critique of Searle's explanation of aspectual shape as anchored in conscious experience. I argue next that, since to represent an object under an aspect is to represent it relative to a selective set of properties, the task - from the perspective of a theory of mental representation - is to explain what makes intentional states property-relative. It is then argued that while this task cannot be handled properly by standard (in particular computational-representational) theories of mental representation, a shift towards an action-based framework for theories of perception and representation promises to provide the key with which to unlock the puzzle.     

美感对西方绘画无意识加工的影响

采用连续闪烁抑制范式(Continuous Flash Suppression, CFS), 通过比较不同美感的图片的突破抑制时间,考察了美感对西方绘画无意识加工的影响。实验1使用黑白噪音图片, 通过单因素被试内设计考察了高、中、低三种美感等级的彩色西方绘画的突破抑制时间。结果发现, 美感高和美感中等的西方绘画比美感低的西方绘画能更快突破噪音图片的抑制进入意识。实验2考察在彩色噪音图片的抑制下, 美感是否依然影响彩色西方绘画突破抑制的时间。结果发现, 美感不影响西方绘画突破抑制时间, 且突破抑制时间显著长于实验1。这些结果表明美感对西方绘画无意识加工的影响受到双眼竞争的眼间抑制过程的限制, 只有在黑白噪音图抑制的情况下, 美感会影响西方绘画进入意识的速度。与黑白噪音图片相比, 彩色噪音图片可能对颜色信息的抑制更强, 干扰了美感对西方绘画无意识加工的影响。     

A direct replication: Unconscious arithmetic processing

Across two experiments involving four presentation times in total, Sklar et al. (Proceedings of the National Academy of Sciences of the United States of America, 109, 2012, 19614) found that complex subtraction equations can be solved without awareness of the equations. These findings challenge the current position that consciousness is necessary for performing abstract, rule-following tasks. Given the important implications of their work, we aimed to directly replicate Sklar's findings using a larger sample (n = 94) from a different population. Using continuous flash suppression, we investigated if people were able to solve an equation after subliminal (1,300 ms) exposure to it. We found evidence of unconscious subtraction consistent with Sklar et al., albeit the effect is weak. Critical review of our results and implications for further research are discussed.