Knowledge is a mental state (at least sometimes)

Philosophical Studies - It is widely held in philosophy that knowing is not a state of mind. On this view, rather than knowledge itself constituting a mental state, when we know, we occupy a belief...     

Origins of the cognitive (r)evolution

The well documented cognitive "revolution" was, to a large extent, an evolving return to attitudes and trends that were present prior to the advent of behaviorism and that were alive and well outside of the United States, where behaviorism had not developed any coherent support. The behaviorism of the 1920 to 1950 period was replaced because it was unable to address central issues in human psychology, a failure that was inherent in part in J. B. Watson's founding manifesto with its insistence on the seamless continuity of human and nonhuman animal behavior. The "revolution" was often slow and piecemeal, as illustrated by four conferences held between 1955 and 1966 in the field of memory. With the realization that different approaches and concepts were needed to address a psychology of the human, developments in German, British, and Francophone psychology provided some of the fuel of the "revolution."     

When discrimination fails (or at least falters)

Pigeons learned 2 concurrent simultaneous discriminations in which the pecking of left keys versus right keys was reinforced depending on a color that appeared on one of the keys. When the reinforced choice was to peck directly at the color, accuracy was very high initially, but dropped noticeably with continued training. Partial reinforcement of these choices exacerbated the dropoff, sometimes causing accuracies to fall close to zero. By contrast, when the reinforced choice was to peck the alternate-key stimulus, accuracy was very low, initially, but remained high and stable following acquisition. Lowering the reinforcement probability, even to zero, for the latter choices had little effect on their accuracy but yielded increased accuracy on color-choice trials. These results resemble the ambiguous-cue effect and suggest the process of value transfer.     

The perceived structural shape of thin (wire-like) objects is different from that of silhouettes

Observers are faster at judging the position of convex vertices compared to concave vertices. This is believed to be due to an explicit representation of position for visual parts. The best evidence comes from comparing the same contours perceived as either figures or holes, because this is a pure figure ground reversal (Bertamini and Croucher, 2003 Cognition 87 33 - 54; Bertamini and Mosca, 2004 Perception 33 35-48). Specifically, an interaction is present between type of object (object or hole) and shape. One assumption is that the contour of a silhouette is perceived as the rim of a solid object. It follows that a different pattern should be found for thin (wire-like) objects compared to silhouettes. We confirm this difference in three experiments. We argue that this is due to the perceived parts when contours can be interpreted as self-occlusion rims.     

Long-term cumulative structural priming persists for (at least) one week

We present an experiment that explores the degree to which cumulative structural priming effects of the sort reported in Kaschak (Memory and Cognition 35:925-937, 2007) persist over the course of a week. In the first session of the experiment, participants completed written sentence stems that were designed to bias them toward producing the double object (Meghan gave Michael a toy) or prepositional object (Meghan gave a toy to Michael) construction. Participants returned for a second session of the experiment a week later. We observed that the biases established in the first phase of the experiment affected performance in the second phase. That is, the cumulative priming effect persisted for a week. The implications of this result for theories of language production are discussed.     

Another Look at the Role of Empty Categories in Sentence Processing (and Grammar)

The gap/gapless processing debate in the psycholinguistics literature contrasts two processing models: one that assumes the trace-based Government and Binding (or Principles and Parameters) Grammar and the (augmented) Active Filler Strategy and one that assumes the traceless Dependency Categorial Grammar and the Principle of Dependency Formation. This paper reports on an experiment that found new evidence against the gapless/traceless model, considers why such evidence was not found in previous studies, and explores whether a parser that combines a (partially) traceless grammar and the augmented Active Filler Strategy can explain the current finding.     

It is the Quality of the Review that Matters

Science and Engineering Ethics -     

How to discover that the real is unreal

The measurement problem in quantum mechanics is presented in a completely non-technical way by means of the results of some very simple experiments. These experimental results themselves, rather than the formalism of quantum theory, are shown to be extremely hard to incorporate in a sensible state-space picture of the world. A novel twist is then added which makes the problem even harder than it appears to be in other presentations of the measurement problem.     

Performance of Asian elephants (Elephas maximus) on a quantity discrimination task is similar to that of African savanna elephants (Loxodonta africana)

Animal Cognition - Using an object-choice task, we measured the relative quantity discrimination ability of Asian elephants. Two zoo-housed elephants were given auditory cues of food being dropped...     

All is well that ends well,at least for proselfs: emotional reactions to equality violation as a function of social value orientation

In step‐level public good dilemmas the equality rule serves as an important distribution rule to tacitly coordinate group members' decisions. In two studies, we examined the motives that may underlie the use of the equality rule. More specifically, we examined whether people use the equality rule out of fairness concerns or out of efficiency concerns. For this purpose, we assessed people's emotional reactions toward a violator of the equality rule when the group succeeded vs. failed, as a function of social value orientation. The results of both experiments showed that proselfs' emotional reactions towards a violator were a function of the success or the failure of the group, whereas prosocials' emotional reactions did not vary as a function of the outcome feedback. These results suggest that prosocials prefer the equality rule out of fairness concerns whereas for proselfs efficiency concerns dominate. Copyright © 2005 John Wiley & Sons, Ltd.     

Another revolution is needed: The creation of an international democracy of the environment

In the face of the multiple threats of destruction facing our environment, it has become urgent for a real political will to emerge. The environment must be at the center of international cooperation and action; a right to the environment must be set up, outlining a duty of ecological intervention.