An asymmetric model is described for interactions in the perception of two dimensions (length and orientation) of a single visual stimulus. Two methods were used to test these interactions, and models for the interpretation of the possible outcomes of these tests are discussed. A length discrimination task showed facilitation (decreased reaction time) when orientation was covaried with length, and interference (increased reaction time) when random orientation variation was introduced. A smaller effect was seen when length was varied in an orientation discrimination task in a correlated or random fashion. Analysis of sequential effects showed that reaction times are fastest on repetition trials and are slowed by either the need to change the response or the need for additional sensory processing. With the second method, it was found that the amount of information transmitted in the estimation of orientation was not affected by the introduction of the redundant dimension of length, but that there was a significant gain in the amount of information transmitted in the estimation of length by the addition of the redundant dimension of orientation. It is concluded that orientation is probably a perceptual primitive of the visual system whereas length is a computed variable. 相似文献
In this paper, I argue that limitarian policies are a good means to further political equality. Limitarianism, which is a view coined and defended by Robeyns (2017), is a partial view in distributive justice which claims that under non-ideal circumstances it is morally impermissible to be rich. In a recent paper, Volacu and Dumitru (2018) level two arguments against Robeyns’ Democratic Argument for limitarianism. The Democratic Argument states that limitarianism is called for given the undermining influence current inequalities in income and wealth have for the value of democracy and political equality. Volacu and Dumitru’s Incentive Objection holds that limitarianism places an excessive and inefficient burden on the rich in ensuring political equality. The Efficacy Objection holds that even if limitarianism limits excessive wealth it still fails to ensure the preservation of political equality. In this paper, I will argue that both of these objections fail, but on separate grounds. I argue that the Incentive objection fails because one could appeal to limitarian policies that are different from the ones discussed by Volacu and Dumitru and which escape the problem of reduced productivity. I argue against the Efficacy Objection that limitarian policies are a partial but highly valuable step towards establishing political equality, and that they can and should complement or be complemented by other strategies.
Through the experiences of a medieval historian and the experiences which have led to her engagement with the Eucharist in the Middle Ages this paper traces some of the ways in which medieval people assumed or discarded identities through their relationships with the Eucharist. The many ways in which the image encompassing an incarnate God in a wheaten disc allowed individual and groups to assert selfhood, difference and specificity are considered through examples of liturgical, mystical and theological relationships, articulations, of the Eucharist. The centrality of Jews as affirmers of Eucharistic truth in late medieval culture through the rejection and violence attributed to them is offered as a necessary facet of the Eucharist's suggestive possibilities. Eucharist is shown as a symbol of interiority and intrinsic value, opposed to Jewish literality and misrecognition of value, ideas which created a link between talk about the Eucharist and discussion of usury. Lastly, some of the historical interests of Jewish writers in the historical links between Jews and the Eucharist are explored. 相似文献
Corporate mergers require proper human resources management to reach their financial and strategic objectives and minimize negative consequences for employee well‐being. Understanding the antecedents of employees’ identification with the merged organization during the corporate merger is crucial, because stronger post‐merger identification results in less conflict and higher levels of motivation. Unfortunately, employees often identify more strongly with their pre‐merger organizations than with the merged organization. One influential approach to understanding the processes underlying organizational identification is the social identity approach ( Tajfel & Turner, 1986 ; Turner, Hogg, Oakes, Reicher, & Wetherell, 1987 ). Research applying this perspective to organizational mergers shows that levels of identification with the merged organization are partly explained by status and dominance differences of the involved organizations, by motivational threats and uncertainties during the merger, and by the representation of the post‐merger identity. Leaders and managers of corporate mergers are able to influence these processes and, thus, to provide a path for successful merger integration. 相似文献
The relationship between exhaustion and work engagement has received considerable attention during the past decades. Although the theoretical proposition exists that work engagement may increase exhaustion over time, previous research has been mixed. Drawing on the transactional stress model and applying latent growth modeling, we aim to provide a more comprehensive picture of the work engagement–exhaustion relationship over time. In two longitudinal studies, with four measurement points each, we found consistent evidence that a higher initial work engagement related to increased exhaustion over time. Consistent with our hypotheses, a higher initial work engagement also related to less initial exhaustion, and increases in work engagement related to decreases in exhaustion over time. However, contrary to our expectations, a higher initial exhaustion related to elevated work engagement over time. In conclusion, our findings suggest that engaged employees are less exhausted but face a higher risk of exhaustion over time. At the same time, exhausted employees are less engaged, but they have the potential to become more so over time. The theoretical and practical implications of these findings will be discussed in this paper. 相似文献