Oppel-Kundt illusion in three-dimensional space

A three-dimensional form of the Oppel-Kundt illusion was examined. Subjects viewed arrays consisting of two parallel rows of lights. For one group the rows consisted of equal numbers of lights (2, 3, or 4), while for a second group the row nearest the subject always had the greater number of lights. Subjects viewed these arrays from two vantage points, one directly in front of the array and the other displaced laterally. For each array subjects adjusted the extent of the far array until they felt the two rows were the same length. Both the nature of the array and the viewpoint had a significant influence on the perceived length of the far row. The size of the near row was overestimated significantly more when the array was viewed from the central position and also when the number of lights in the near row exceeded that of the far row. These results confirm that a lateral viewing position decreases the perspective effect and indicate that the Oppel-Kundt illusion can occur with three-dimensional stimuli.     

Reasoning rats: forward blocking in Pavlovian animal conditioning is sensitive to constraints of causal inference

Forward blocking is one of the best-documented phenomena in Pavlovian animal conditioning. According to contemporary associative learning theories, forward blocking arises directly from the hardwired basic learning rules that govern the acquisition or expression of associations. Contrary to this view, here the authors demonstrate that blocking in rats is flexible and sensitive to constraints of causal inference, such as violation of additivity and ceiling considerations. This suggests that complex cognitive processes akin to causal inferential reasoning are involved in a well-established Pavlovian animal conditioning phenomenon commonly attributed to the operation of basic associative processes.     

Fifty years on: a training for the 21 century, from couple to community

The paper describes the gradual transformation of the structures, process and content of the adult training at the Society of Analytical Psychology (SAP) from 1997 when the potential for individuation had gone awry through lack of a culturally relevant and coherent programme until 2005 when trainees' professional and personal individuation could be enhanced by a process and a curriculum representing fairly the interests and beliefs of the range of different approaches to Jungian psychology that are to be found in the SAP. The process has taken eight years to complete and in the paper, the authors, two successive Directors of Training, describe the persistent resistances to necessary change from within their Society, focusing in particular on the key role of the founder member; the privileging of the internal world at the expense of significant external factors; a confusion of roles among members between volunteers and professionals and last, but by no means least, the contamination of the educative task and the creation of a training community by fantasies of the mother/infant couple.     

Stressors, resources, and strain at work: a longitudinal test of the triple-match principle

Two longitudinal studies investigated the issue of match between job stressors and job resources in the prediction of job-related strain. On the basis of the triple-match principle (TMP), it was hypothesized that resources are most likely to moderate the relation between stressors and strains if resources, stressors, and strains all match. Resources are less likely to moderate the relation between stressors and strains if (a) only resources and stressors match, (b) only resources and strains match, or (c) only stressors and strains match. Resources are least likely to moderate the relation between stressors and strains if there is no match among stressors, resources, and strains. The TMP was tested among 280 and 267 health care workers in 2 longitudinal surveys. The likelihood of finding moderating effects was linearly related to the degree of match, with 33.3% of all tested interactions becoming significant when there was a triple match, 16.7% when there was a double match, and 0.0% when there was no match. Findings were most consistent if there was an emotional match or a physical match.     

Avoidance behavior can function as a negative occasion setter

The authors put forward the hypothesis that avoidance learning can result from the fact that participants learn (a) that a stimulus is followed by an unconditioned stimulus (US) when the avoidance behavior is not emitted and (b) that the stimulus is not followed by the US when the avoidance behavior is emitted. As such, avoidance behavior is assumed to function as a negative occasion setter. The results of a contingency judgment experiment involving 65 students showed that avoidance behavior indeed has the unique functional properties of a negative occasion setter (resistance to counterconditioning and selective transfer of modulation).     

Retrieval of incidental stimulus-response associations as a source of negative priming

Priming effects of ignored distractor words were investigated in a task-switching situation that allowed an orthogonal variation of priming and response compatibility between prime and probe. Across 3 experiments, the authors obtained a disordinal interaction of priming and response relation. Responding was delayed in the ignored repetition condition if different responses were required for identical stimuli in the prime and probe (negative priming). Repeating the prime distractor in the probe facilitated responding if the same response was required in the prime and in the probe (positive priming). The same pattern of results was replicated in a letter-matching task without task switching (Experiment 4). Findings lend support to a new model that explains negative priming in terms of an automatic retrieval of incidental stimulus-response associations.     

A comparison of forward blocking and reduced overshadowing in human causal learning

In this study, we directly compared forward blocking with reduced overshadowing in a human causal learning study using an A+, B- (first learning stage), AX+, BY+, KL+ (second learning stage) design. The results showed that reduced overshadowing was significantly stronger than forward blocking. These results are problematic for at least some associative learning models but were predicted on the basis of higher order reasoning accounts of cue competition in human causal learning.     

Is World Poverty a Moral Problem for the Wealthy?

This article discusses the question of poverty and wealth in light of several theses put forward by Larry Temkin. The claim that there is a sort of cosmic injustice involved when great disparities of ability or of wealth are found. He is concerned especially about disparities that are undeserved. It is agreed that this is unfortunate, but not agreed that they are unjust in a sense that supports the imposition of rectification on anyone else. Nor is poverty typically undeserved in the only really relevant sense: the poor simply do not produce enough to earn them high incomes, and probably correct incomes they derive are indeed what such efforts are worth in the circumstances. That persons with very low incomes may merit our sympathy is accepted, but sympathy leads to charity, rather than to the involuntary exploitation of the better off. The essay concludes with further observations about the relevance of free markets, and points to the iniquities of the restrictions on commerce that are the most potent source of perpetuated poverty today.     

Magnifying effects on visual word recognition: a dynamic display for internet-based experiments

A visual presentation procedure is introduced that presents target words followed by a dynamic mask until recognition. This form of stimulus degradation prolongs the word recognition process. Differences in word recognition latencies—which are usually quite small—are magnified, and thus can be more easily observed. The results of two experiments on the Internet with a total of 141 participants establish the task’s ability to magnify differences in word recognition latencies stemming from word familiarity (Experiment 1) and word prototypicality (Experiment 2). Both factors interact with stimulus degradation, but at different presentation intervals; these results are discussed as evidence for comparing models of word recognition. The new procedure can be used for assessing individual differences, such as implicit motives and self-focused attention. Further applications are discussed.