Determinants of phrasing effects in rat serial pattern learning

Two experiments investigated how brief pauses introduced into serial patterns as phrasing cues would affect pattern learning in rats. In Experiment 1, a 24-element pattern consisted of eight 3-element chunks, whereas a 20-element pattern consisted of four 5-element chunks. In both patterns, 3.0-s temporal pauses placed at chunk boundaries (synchronous phrasing cues) facilitated learning compared to no phrasing. Cues "out of sync" with pattern structure (asynchronous phrasing cues) facilitated learning for the 24-element pattern and retarded learning for the 20-element pattern. Evidence suggested that in the latter case, 3.0-s pauses served as "blank" trials that induced rats to "skip" to the next serial position in sequence. In Experiment 2, shorter 0.5-s pauses served as phrasing cues in the 20-element pattern of Experiment 1. Synchronous short cues facilitated learning, whereas asynchronous phrasing cues had no effect. Furthermore, removal of synchronous cues produced deficits in performance on formerly cued trials, whereas removal of asynchronous cues had no effect. The results of Experiment 2 support the notion that in both experiments phrasing cues served as discriminative cues and indirectly suggest that rats are concurrently sensitive to pattern element cues, extra-sequence cues (such as phrasing cues), and to the relative timing of sequential events.     

Chimpanzee (<Emphasis Type="Italic">Pan troglodytes</Emphasis>) and orangutan (<Emphasis Type="Italic">Pongo abelii</Emphasis>) forethought: self-control and pre-experience in the face of future tool use

Planning for future needs has traditionally been considered to be restricted to human cognition. Although recent studies on great ape and corvid cognition challenge this belief, the phylogenesis of human planning remains largely unknown. The complex skill for future planning has not yet been satisfactorily established in any other extant primate species than our own. In humans, planning for future needs rely heavily on two overarching capacities, both of which lie at the heart of our cognition: self-control, often defined as the suppression of immediate drives in favor of delayed rewards, and mental time travel, which could be described as a detached mental experience of a past or future event. Future planning is linked to additional high complexity cognition such as metacognition and a consciousness usually not attributed to animals. In a series of four experiments based on tool use, we demonstrate that chimpanzees (Pan troglodytes) and orangutans (Pongo abelii) override immediate drives in favor of future needs, and they do not merely rely on associative learning or semantic prospection when confronted with a planning task. These results suggest that great apes engage in planning for the future by out competing current drives and mentally pre-experiencing an upcoming event. This suggests that the advanced mental capacities utilized in human future planning are shared by phylogenetically more ancient species than previously believed.     

Modeling self on others: An import theory of subjectivity and selfhood

This paper outlines an Import Theory of subjectivity and selfhood. Import theory claims that subjectivity is initially perceived as a key feature of other minds before it then becomes imported from other minds to own minds whereby it lays the ground for mental selfhood. Import theory builds on perception-production matching, which in turn draws on both representational mechanisms and social practices. Representational mechanisms rely on common coding of perception and production. Social practices rely on action mirroring in dyadic interactions. The interplay between mechanisms and practices gives rise to model self on others. Individuals become intentional agents in virtue of perceiving others mirroring themselves. The outline of the theory is preceded by an introductory section that locates import theory in the broader context of competing approaches, and it is followed by a concluding section that assesses import theory in terms of empirical evidence and explanatory power.     

Better safe than sorry: Simplistic fear-relevant stimuli capture attention

It has been consistently demonstrated that fear-relevant images capture attention preferentially over fear-irrelevant images. Current theory suggests that this faster processing could be mediated by an evolved module that allows certain stimulus features to attract attention automatically, prior to the detailed processing of the image. The present research investigated whether simplified images of fear-relevant stimuli would produce interference with target detection in a visual search task. In Experiment 1, silhouettes and degraded silhouettes of fear-relevant animals produced more interference than did the fear-irrelevant images. Experiment 2, compared the effects of fear-relevant and fear-irrelevant distracters and confirmed that the interference produced by fear-relevant distracters was not an effect of novelty. Experiment 3 suggested that fear-relevant stimuli produced interference regardless of whether participants were instructed as to the content of the images. The three experiments indicate that even very simplistic images of fear-relevant animals can divert attention.     

Rendering unto Science and God: Is NOMA Enough?

The proverbial “war between science and religion” has in many quarters reached the status of truism. Francisco J. Ayala seeks to negotiate a truce between the opposing sides through implementing the concept of the Non-overlapping Magisteria (NOMA) of science and theology. The NOMA understanding of the interaction between science and religion maintains that science and religion cannot contradict each other because each discipline has its own proper range of inquiry, namely questions of fact versus questions of value. This article explores the boundaries of these two different domains of knowledge and finds that in both theory and practice, the territorial claims overlap significantly. Furthermore, the author argues that such “territorial trespassing” is not owing to misunderstandings concerning the essence of science and of religion as such. Instead, the overlap of boundary lines—when viewed in light of the history and philosophy of science—is understood as integral to how progressive research normally advances in both science and theology.     

Disjunctivism and the urgency of scepticism

This paper argues that McDowell is right to claim that disjunctivism has anti-sceptical implications. While the disjunctive conception of experience leaves unaffected the Cartesian sceptical challenge, it undermines another type of sceptical challenge. Moreover, the sceptical challenge against which disjunctivism militates has some philosophical urgency in that it threatens the very notion that perceptual experience can acquaint us with the world around us.     

Pigeons perceive a reversed Zöllner illusion

Pigeons are susceptible to several size and length illusions, but in some cases the bias has been shown to be opposite to that seen in humans. To further investigate how their perceptual system works, we asked how pigeons perceive orientation illusions. We used the Zöllner illusion, in which parallel lines look non-parallel due to series of short crosshatches superimposed on the lines. First, we trained six birds to peck at the narrower (or wider) of the two gaps at the end of a pair of non-parallel target lines. After adapting the subjects to target lines with randomly oriented crosshatches (which result in no illusion at least to humans), we tested the pigeons’ responses on randomly inserted probe trials, in which crosshatches that should induce the standard Zöllner-like illusion for humans replaced the random-oriented ones. The results suggested that pigeons do perceive an illusion from Zöllner figures, but in the direction opposite to that of humans. We propose that pigeons, contrary to humans, may assimilate the two lines of different orientations (each main line and crosshatch), which results in underestimation of acute angles, and this in turn may lead to a reversed Zöllner illusion. Such assimilation dominance appears consistent with previous reports obtained for line length and size illusions in this species.     

Increased spreading activation in depression

The dopaminergic system is implicated in depressive disorders and research has also shown that dopamine constricts lexical/semantic networks by reducing spreading activation. Hence, depression, which is linked to reductions of dopamine, may be associated with increased spreading activation. However, research has generally found no effects of depression on spreading activation, using semantic priming paradigms. We used a different paradigm to investigate the relationship between depression and spreading activation, one based on word frequencies. Our sample included 97 undergraduates who completed the BDI-II and the Controlled Oral Word Association test as well as the Animal Naming test. The results indicated that the group scoring within the depressed ranged evidenced greater spreading activation as compared to those who scored within the normal range on the BDI-II. The implications of these results as they relate to creativity in depression is discussed.     

Inferring the Mental Processes of Other Minds

Abstract

In 4 experiments, the authors examined how several variables influence the quality and quantity of information that people use to make judgments about other people. The results showed that when possible, participants consistently responded appropriately to variables that influenced information that they used to make inferences about other minds. The results also suggested that under circumstances with no opportunity to contrast behavior in different situations, people might not be sensitive to the quality and quantity of information present. The authors interpreted results to mean that under most circumstances, people make inferences in a way that efficiently uses information about the causes of behavior.     

ALL ANIMALS MATTER: MARC BEKOFF'S CONTRIBUTION TO CONSTRUCTIVE CHRISTIAN THEOLOGY

Abstract. Along with Jane Goodall, Mark Bekoff proposes that religion can join science in recognizing that animals have minds of their own; that humans can humbly imagine themselves inside these minds, all the while recognizing their independent integrity; and that, as creatures with psyches, animals deserve respect and care. In his various writings Bekoff offers many hints of what a theology of animal minds might look like and how it might be part of a more comprehensive theology of respect and care for the community of life. Process or Whiteheadian theology offers a way of appreciating Bekoff's insights, linking them with the ecojustice movement, showing how they can be linked with various themes in evolutionary biology, and developing a threefold approach to animal well‐being: cosmological, ethical, and spiritual. In so doing, process thought shows how the practice of science, particularly as expressed in cognitive theology, involves a marriage of empathy and observation, which represents science and spirituality at their best.