Learning Visual Units After Brief Experience in 10‐Month‐Old Infants

How does perceptual learning take place early in life? Traditionally, researchers have focused on how infants make use of information within displays to organize it, but recently, increasing attention has been paid to the question of how infants perceive objects differently depending upon their recent interactions with the objects. This experiment investigates 10‐month‐old infants' use of brief prior experiences with objects to visually organize a display consisting of multiple geometrically shaped three‐dimensional blocks created for this study. After a brief exposure to a multipart portion of the display, each infant was shown two test events, one of which preserved the unit the infant had seen and the other of which broke that unit. Overall, infants looked longer at the event that broke the unit they had seen prior to testing than the event that preserved that unit, suggesting that infants made use of the brief prior experience to (a) form a cohesive unit of the multipart portion of the display they saw prior to test and (b) segregate this unit from the rest of the test display. This suggests that infants made inferences about novel parts of the test display based on limited exposure to a subset of the test display. Like adults, infants learn features of the three‐dimensional world through their experiences in it.     

消费者不道德行为与员工情绪衰竭关系的调节性中介模型

大量研究业已揭示,消费者针对员工的不道德行为是导致员工情绪衰竭的重要因素,但是对于消费者不针对员工的不道德行为（consumer unethical behavior that are not employee directed,CUB）是否会影响员工的情绪衰竭,研究还较少涉及。基于道义伦理学,本研究提出了一个调节性中介模型,以分析CUB与员工情绪衰竭的关系。该模型假定,CUB与员工情绪衰竭之间的关系以情绪抑制为中介,并且受到员工道德认同的调节。对198名销售人员的研究发现,即使控制了消费者针对员工的不道德行为,CUB仍影响着员工的情绪衰竭;CUB与员工情绪衰竭的关系受到道德认同的调节,道德认同较高的员工表现出较高程度的情绪抑制与情绪衰竭。研究支持了假设的调节性中介模型,情绪抑制在CUB和情绪衰竭之间发挥着部分中介作用,不仅如此,这一中介作用还受到道德认同的调节,情绪抑制在CUB和情绪衰竭之间的间接效应主要表现在道德认同较高的员工中。最后探讨了研究发现的理论意义、不足及未来发展方向。     

Variance misperception explains illusions of confidence in simple perceptual decisions

Confidence in a perceptual decision is a judgment about the quality of the sensory evidence. The quality of the evidence depends not only on its strength (‘signal’) but critically on its reliability (‘noise’), but the separate contribution of these quantities to the formation of confidence judgments has not been investigated before in the context of perceptual decisions. We studied subjective confidence reports in a multi-element perceptual task where evidence strength and reliability could be manipulated independently. Our results reveal a confidence paradox: confidence is higher for stimuli of lower reliability that are associated with a lower accuracy. We show that the subjects’ overconfidence in trials with unreliable evidence is caused by a reduced sensitivity to stimulus variability. Our results bridge between the investigation of miss-attributions of confidence in behavioral economics and the domain of simple perceptual decisions amenable to neuroscience research.     

Emotional suppression explains the link between early life stress and plasma oxytocin

Early life stress (ELS) has been found to be associated with lower concentrations of plasma oxytocin (OT) in adulthood. It is not yet clear, however, what mechanisms underlie this association. The goal of the present study was to test the role of emotional suppression as an intervening variable between ELS in childhood and plasma OT. In a nonclinical sample of 90 men, ELS, emotional suppression, and plasma OT were assessed. Emotional suppression was positively associated with ELS (r = 0.37, p < 0.001) and negatively associated with plasma OT concentrations (r = ?0.30, p < 0.01). In contrast, cognitive reappraisal – an alternative emotion regulation strategy – was not correlated with ELS or plasma OT concentrations. Cross-sectional regression analyses revealed that the ELS explained variance in plasma OT via emotional suppression. Moderation analyses revealed that the combination of high ELS and high emotional suppression was associated with the lowest concentrations of plasma oxytocin. These findings are consistent with the view that emotional suppression may be one pathway linking ELS and OT.     

Attentional Capture in Younger and Older Adults

The present study was designed to examine age-related differences in attentional capture. In the first experiment, participants identified targets defined either by an abrupt onset or by color difference. Prior to the presentation of the targets, onset or color cues were presented. It was found that color cues, but not onset cues, captured attention for color targets for both younger and older adults. It was also found, however, that onset and color cues captured attention for onset targets for both age groups. Moreover, while both types of cues yielded equivalent attentional capture effects with the younger adults, onset cues yielded greater effects for the older adults. The second experiment, using only younger adults, replicated the pattern of results found with the younger adults in the first experiment. The findings from these two experiments provide only partial support for the contingent involuntary orienting hypothesis, which suggests that only cues that share critical features with targets will capture attention. Moreover, the results also indicate that there are age-related differences in attentionalcapture.     

Implicit sequence learning in a search task

This study investigated the effects of selection demands on implicit sequence learning. Participants in a search condition looked for a target among seven distractors and responded on the target identity. The responses followed a deterministic sequence, and sequence learning was compared to that found in two control conditions in which the targets were presented alone, either at a central location or over a series of unpredictable locations. Sequence learning was obtained in all conditions, and it was equivalent for the two variable location conditions, regardless of the perceptual demands. Larger effects of learning were observed in the central location, both on the indirect measures and on the measures taken from a cued-generation task. The expression of learning decreased selectively in this condition when the sequence validity was reduced over a test block. These results are consistent with the claims that implicit and explicit learning are mixed in this central condition and that implicit learning is not affected by selection difficulty.     

Effects of load on the time course of attentional engagement,disengagement, and orienting in reading

Sensory-motor delays vary over the course of development and under different environmental conditions. Previous research has shown that humans can compensate for the resulting temporal misalignment while performing sensory-motor tasks (e.g., Cunningham, Billock, & Tsou, 2001a), but remains silent on the question of whether perceptual learning—similar to that involved in adaptation to spatial misalignment (e.g., Redding & Wallace, 1993) and in adaptation to purely intersensory misalignment (e.g., Fujisaki, Shimojo, Kashino, & Nishida, 2004)—is also involved in this adaptive response. Following an attempted replication of Cunningham et al.'s (2001a) study in a preliminary experiment, we present in this paper two experiments that demonstrate that after-effects of adaptation to temporal misalignment do not spontaneously decay. The literature on adaptation to spatial misalignment suggests that, while instrumental learning spontaneously decays in the absence of reinforcement, perceptual learning persists. Therefore our results are consistent with adaptation being effected through perceptual learning.     

Perceptual learning in face processing: Comparison facilitates face recognition

Theoretical analyses of perceptual learning suggest that comparison between similar stimuli aids subsequent discrimination between them. The current studies examined whether the opportunity to compare a target face to other similar faces during a preexposure phase facilitated performance on a matching task. Performance was better when the target face had been presented in alternation with similar comparator faces than if that target had not been exposed before test. Exposure to the target face without comparators, or exposure alternating with dissimilar faces, improved performance relative to the nonexposed control but performance was not as good as when target exposure was given in alternation to similar comparison faces. The effects were not influenced by image changes between exposure and test. It is suggested that exposure to a face in comparison to similar stimuli focuses the central representation of a face on its unique features. In practical terms these results suggest that reliable identification of an individual from their photograph would be improved by viewing that photograph in comparison with photographs of similar people.     

The interaction between self-bias and reward: Evidence for common and distinct processes

The perceptual matching of shapes and labels can be affected by both self- and reward-biases when shapes are linked either to labels referring to particular individuals (you, friend, stranger) or to different reward values (£8, £2, £0). We investigated the relations between these biases by varying the reward value associated with particular shape–label pairs (circle–you, square–friend, triangle–stranger). Self shape–label pairs (circle–you) always received no reward, while friend shape–label pairs (square–friend) received high reward and stranger shape–label pairs low reward (triangle–stranger), or the reverse (friend—low reward; stranger—high reward). Despite receiving no reward, responses to self-related pairs were advantaged relative to those to low-reward stimuli and did not differ from those to high-reward items. There was also an advantage for responses to high-reward friend pairs relative to low-reward stranger stimuli, and for high-reward stranger stimuli compared to low-reward friends. Correlations across individuals were found across trial blocks for both the self-advantage and the high-reward advantage, but the self- and reward-advantages were uncorrelated. This suggests that the self- and reward-advantage effects have different origins. In addition, the magnitude of the self-advantage varied according to the rated personal distance between a participant and a stranger. For individuals manifesting a close personal distance to strangers, the self-advantage was smaller, and sensitivity to reward influenced the difference between the self- and high-reward conditions. For individuals manifesting a large personal distance to strangers, sensitivity to reward did not affect self-matching. We suggest that self-advantages on perceptual matching arise independent of reward for individuals with a large personal distance to strangers. On the other hand, in individuals with a weak self-bias, high reward and the self modulate a common subjective value system.