Mule cognition: a case of hybrid vigour?

This study compares the behaviour of the mule (Equus asinus × Equus caballus) with that of its parent species to assess the effects of hybridization on cognition. Six mules, six ponies (E. caballus) and six donkeys (E. asinus) were given a two choice visual discrimination learning task. Each session consisted of 12 trials and pass level was reached when subjects chose the correct stimulus for at least 9 out of the 12 trials in three consecutive sessions. A record was made of how many pairs each subject learnt over 25 sessions. The mules’ performance was significantly better than that of either of the parent species (Kruskal-Wallis: H_x = 8.11, P = 0.017). They were also the only group to learn enough pairs to be able to show a successive reduction in the number of sessions required to reach criterion level. This study provides the first empirical evidence that the improved characteristics of mules may be extended from physical attributes to cognitive function.     

Navigating joint projects with dialogue

Dialogue has its origins in joint activities, which it serves to coordinate. Joint activities, in turn, usually emerge in hierarchically nested projects and subprojects. We propose that participants use dialogue to coordinate two kinds of transitions in these joint projects: vertical transitions, or entering and exiting joint projects; and horizontal transitions, or continuing within joint projects. The participants help signal these transitions with project markers, words such as uh‐huh, m‐hm, yeah, okay, or all right. These words have been studied mainly as signals of listener feedback (back‐channel signals) or turn‐taking devices (acknowledgment tokens). We present evidence from several types of well‐defined tasks that they are also part of a system of contrasts specialized for navigating joint projects. Uh‐huh, m‐hm and yeah are used for horizontal transitions, and okay and all right for vertical transitions.     

Attributed influence: The importance of observing change

The presence of a target's unexpected change in behavior following an influence attempt was hypothesized to be a critical variable for attributing influence to a particular agent. Observers read a brief story in which an agent's intervention was followed by the target's compliance, noncompliance, or countercompliance to the request. The results indicated that influence was attributed to the agent in the conditions demonstrating change, i.e., compliance and countercompliance, regardless of the direction of that change. Additional findings indicated that influence attributed to an agent decreased if the target delayed final compliance with the intervention.     

Transmettre la relation de service par l’interaction tutorale: le cas des facteurs

Based on data gathered from naturalistic observation, the article analyses the communicative activity implemented by postmen involved in tutoring users and their apprentices. The occupational situation observed is that of mail distribution, and the critical moments selected are those which bring customer relations into play. We examine the role of the other in the way three tutors pass on their customer relations skills. We show that their means of interaction and understanding situations differ widely.     

Assessment of attack and drinking in White King pigeons on response-independent food schedules.

Four White King pigeons in Experiment I were exposed to a fixed-time 90-second food schedule with successive access to water and a conspecific target. Drinking per session was sporadic and minimal, while attack per session occurred during most interfood intervals for all animals. Analysis of the temporal distribution of attack showed that the typical postreinforcement pattern of attack developed over the course of the experiment. In Experiment II, the same animals were exposed to a series of fixed-time schedules ranging from 30 to 360 seconds with successive access to water and target. Time engaged in drinking and the number of interfood intervals with drinking were less than that of attack. Food and no-food baselines, which have been typically used to assess schedules-induced drinking and attack, respectively, were used to evaluate the effect of the schedule on attack and water ingestion. Relative to the no-food baseline, both attack and drinking were enhanced by the schedule in all birds. Relative to the food baseline, drinking was slightly suppressed in three birds and attack was enhanced in all. For all animals, the food baseline resulted in more attack and drinking than the no-food baseline.     

The role of intermittent food in the induction of attack in pigeons

The present experiments evaluated whether transitions in reinforcer probability are necessary to induce attack in pigeons. In Experiment I, three of six pigeons exposed to response-contingent constant-probability food schedules and a photograph of a conspecific as a target exhibited sustained postreinforcement attack on the target. The postreinforcement pattern of attack developed over the course of the experiment and was accompanied by a reduction in the rate of postreinforcement key pecking and an increase in the postreinforcement pause in key pecking. These effects on key pecking resulted in unprogrammed variations in the probability of reinforcement which may have been responsible for the induction of attack. In Experiment II, the attack-inducing properties of a constant-probability response-independent food schedule were compared to a periodic food schedule matched for overall rate of food delivery and to a no-food condition. In addition to attack, the spatial location of the subjects was monitored during each interfood interval. The periodic and aperiodic food schedules generated very different patterns of spatial location. Postfood attack was induced by both food schedules, although the constant-probability schedule induced attack in fewer birds. The no-food condition was not effective in inducing attack in any birds. These experiments indicate that intermittent food schedules without reductions in reinforcer probability are sufficient to induce attack in some pigeons, although not as effective as schedules with transitions in reinforcer probability.     

Empathy as intersubjectivity: resolving Hume and Smith’s divide

Although empathy is arguably an important factor to consider in moral education, the concept itself has consistently stood on tenuous ground. In this essay, I claim that our adherence to ontological dualism and discrete subjectivity have problematized our comprehension of empathy. I propose that our understanding is limited by our understanding of selfhood. If the self were defined as intersubjective, along the lines of Merleau-Ponty, then empathy’s ambiguities would dissipate. After reconceptualizing empathy in light of intersubjectivity, I call for pedagogical relations that are aligned with developmental research, which provides further support for adhering to an alternative conception of the phenomenon.     

Equivocation as a Point of Order

Equivocation, or multiple meaning, is explained through the introduction of an additional response, the distinction, to points of order in formal dialogue objecting to immediate inconsistency.     

ANDREW DICKSON WHITE AND THE HISTORY OF A RELIGIOUS FUTURE

Andrew Dickson White played a pivotal role in constructing the image of a necessary, and even violent, confrontation between religion and science that persists to this day. Though scholars have long acknowledged that his position is more complex, given that White claimed to be saving religion from theology, there has been no attempt to explore what this means in light of his overwhelming attack on existing religions. This essay draws attention to how White's role as a historian was decisive in allowing him to posit a future for religion purified of dogma by science. It argues, furthermore, that this effort is better understood as religious innovation, rather than a plea for strictly secular science. In so doing it hopes to lay the foundation for a more fruitful historical treatment of White, and a range of other figures whose devotion to science has otherwise been difficult to grasp.