Visual impressions of generative transmission

ABSTRACT

Previous research has shown that stimuli in which a moving object (A) contacts a stationary one (B) and stops, and object B then moves off in the same direction, give rise to a causal impression: object A is perceived as producing the motion of object B. This impression is weakened or does not occur if there is a delay between A contacting B and B moving, or if there is a spatial gap between B and the location at which A stops. It is shown that a strong causal impression can occur despite the presence of both gap and delay if there are cues to generative transmission of causal influence from A to B. The cues investigated were successive colour change of a series of objects filling the gap between A and B. Reported causal impressions were stronger with the colour change stimuli than with stimuli in which the objects were present but did not change colour, and stronger if the colour change proceeded from A to B than if it proceeded in the opposite direction. Reported causal impressions increased in strength as the number of objects involved in the colour change increased, consistent with the hypothesis that the colour change is a cue to a process of transmission, and inconsistent with the hypothesis that it is perceived or inferred as involving a chain of causal relations. Other kinds of changes to object properties—a small upward motion, shrinkage without moving, and disappearance—yielded similar results. It appears that any rapid sequential change in object properties in the direction of causal influence can function to give rise to the visual impression of generative transmission. The possible role of apparent motion is discussed.     

Holistic face perception: Mind the gap!

The most widely used measurement of holistic face perception, the composite face effect (CFE), is challenged by two apparently contradictory goals: having a defined face part (i.e., the top half), and yet perceiving the face as an integrated unit (i.e., holistically). Here, we investigated the impact of a small gap between top and bottom face halves in the standard composite face paradigm, requiring matching of sequentially presented top face halves. In Experiment 1, the CFE was larger for no-gap than gap stimuli overall, but not for participants who were presented with gap stimuli first, suggesting that the area of the top face half was unknown without a gap. This was confirmed in Experiment 2, in which these two stimulus sets were mixed up: the gap stimuli thus provided information about the area of a top face half and the magnitude of the CFE did not differ between stimulus sets. These observations indicate that the CFE might be artificially inflated in the absence of a stimulus cue that objectively defines a border between the face halves. Finally, in Experiment 3, observers were asked to determine which of two simultaneously presented faces was the composite face. Perceptual judgements for no-gap stimuli approached ceiling; however, with a gap, participants were almost unable to distinguish the composite face from a veridical face. This effect was not only due to low-level segmentation cues at the border of no-gap face halves, because stimulus inversion decreased performance in both conditions. This result indicates that the two halves of different faces may be integrated more naturally with a small gap that eliminates an enhanced contrast border. Collectively, these observations suggest that a small gap between face halves provides an objective definition of the face half to match and is beneficial for valid measurement of the behavioural CFE.     

The effect of feature discriminability on the intertrial inhibition of focused attention

Identifying the shape of a colour oddball is faster when the distractor colour is viewed in the preceding target-absent trial and slower when the target colour is previewed, an intertrial effect known as the distractor previewing effect (DPE). We tested the effect of feature discriminability on the DPE. In Experiment 1, we determined the interitem discriminability of two colour pairs and two shape pairs. In Experiments 2 and 3, we measured DPEs with these set of target–distractor discriminability pairs. Our results showed that when the defining features allow for efficient parallel search, the a priori degree of interitem discriminability did not modulate the DPE. The results suggest the DPE does not arise as a strictly bottom-up modulation of saliency of the search-relevant features but reflects an attentional bias aimed at preventing attention from revisiting recently rejected “search features”. The underlying mechanism of this attentional bias is discussed.     

Conditional reasoning in context: A developmental dual processes account

The way individuals interpret “if p then q” conditionals varies with content and context, often resulting in a biconditional reading. Surprisingly, truth table tasks reveal the existence of two different types of biconditional interpretations: equivalence, as for promises and threats, and defective biconditional, as for causal conditionals or indicative conditionals involving binary terms. The aim of this study was to determine how the interpretation of indicative conditionals is affected in children, adolescents, and adults, by restricting their context of enunciation to only one possible alternative for both the antecedent and the consequent. Moreover, we wanted to determine what is the exact nature of the biconditional interpretation induced by these restricted contexts. For this purpose, third, sixth, and ninth graders and adults performed a truth-value task on indicative conditionals presented either in restricted on non-restricted contexts. Restricted contexts had no effect on children who have a conjunctive interpretation of the conditional, but elicited a predominant defective biconditional reading in adolescents and adults. These results corroborate the developmental dual process account of conditional reasoning proposed by Gauffroy and Barrouillet (2009).     

Job insecurity and well-being: The moderating role of job dependence

Job insecurity has become more relevant during the last decades as more flexibility from the workforce and organizations is demanded in the labour market. It has frequently been suggested that job insecurity is a more severe stressor for those who are more dependent on their job. The present study investigates the association between job insecurity and employee well-being by focusing on how employees’ dependence on the job moderates this relationship. Two types of financial dependence (subjective financial dependence and relative contribution to the household income) were studied, along with an indicator of a more psychological dependence on work in general (work involvement). In addition to this, both quantitative and qualitative job insecurity were included. The proposed relations were tested in a sample of Swedish accountancy firm employees. The results of moderated hierarchical regression analyses showed that subjective financial dependence, household contribution, and work involvement moderated the relation between both job insecurity dimensions and job satisfaction. No moderations were found with mental well-being as an outcome. This implies that the extent to which someone depends on their job is important for how job insecurity relates to job satisfaction.     

行为抑制性、母亲养育方式和学步儿问题行为的关系

采用实验室观察及问卷法,考察学步儿行为抑制性、母亲养育方式和问题行为的关系。结果发现:(1)行为抑制性正向预测内隐问题行为;母亲拒绝正向预测外显问题行为;母亲保护担忧负向预测外显问题行为。(2)性别能调节母亲养育方式与问题行为之间的关系,母亲鼓励独立负向预测男孩内隐问题行为;母亲拒绝正向预测女孩内隐问题行为;保护担忧负向预测男孩外显问题行为;母亲惩罚正向预测男孩外显问题行为。     

慢性阻塞性肺疾病急性加重期临床路径应用效果评价

评价临床路径管理在慢性阻塞性肺疾病急性加重期（AECOPD）的应用效果。通过采用回顾性调查,比较进入临床路径（路径组）和没有进入临床路径（对照组）两组患者在住院费用、住院时间及治疗效果3项指标上的差别。结果显示实施临床路径患者（路径组）的平均住院费用、平均住院日等指标均有不同程度的下降,而治愈率有所上升。从而得出临床路径在AECOPD病种的应用能够规范医疗行为,提高医疗护理质量的结论。     

不同建议来源和关系亲疏下突发事件决策中的框架效应

从建议来源和关系亲疏两个方面对突发事件下的决策框架效应进行探讨。采用2（建议来源：来自普通群众／消防人员）×2（关系亲疏：关系亲密／关系疏远）×2（任务框架：正面框架／负面框架）完全被试间实验设计。实验材料以突发事件为背景,根据Kahneman（1981）研究的经典“亚洲疾病问题”改编。采用集体施测的方法,240名来自济南和重庆的大学生参加了实验。结果发现：①建议来源影响被试的决策反应,尤其是当建议来自专业人士（如消防人员）时,决策者表现出偏好于风险的单向框架效应;②关系亲疏导致不同的框架效应,在拯救包括亲属在内的受灾人群（关系亲密）时,框架效应非常明显;但当拯救陌生人（关系疏远）时,决策者表现出偏好于风险的单向框架效应;③当建议来源和关系亲疏共同作用于被试决策时,凡涉及关系亲密条件时决策者不管建议来源都表现出明显的框架效应;而当关系疏远时不同的建议来源导致决策者的决策框架不同。这说明,不同的建议来源和关系亲疏对突发事件下的决策框架效应产生了影响。