The Influence of Shared Visual Context on the Successful Emergence of Conventions in a Referential Communication Task

Human communication is thoroughly context bound. We present two experiments investigating the importance of the shared context, that is, the amount of knowledge two interlocutors have in common, for the successful emergence and use of novel conventions. Using a referential communication task where black‐and‐white pictorial symbols are used to convey colors, pairs of participants build shared conventions peculiar to their dyad without experimenter feedback, relying purely on ostensive‐inferential communication. Both experiments demonstrate that access to the visual context promotes more successful communication. Importantly, success improves cumulatively, supporting the view that pairs establish conventional ways of using the symbols to communicate. Furthermore, Experiment 2 suggests that dyads with access to the visual context successfully adapt the conventions built for one color space to another color space, unlike dyads lacking it. In linking experimental pragmatics with language evolution, the study illustrates the benefits of exploring the emergence of linguistic conventions using an ostensive‐inferential model of communication.     

Making Sense of Sorai: How to Deal with the Contradictions in Ogyū Sorai's Political Theory

To understand the political theory—and especially its alleged modernity—of Ogyū Sorai, one of the most important philosophers of Tokugawa Japan, we need to understand the pivotal role that heaven, gods and spirits play in this theory. This is no easy task. This article will start with an analysis of the reasons of this difficulty: the numerous tensions and contradictions found in Sorai's remarks on the subject. Refusing to ignore one side of the story, refusing also to reach too quickly a verdict of inconsistency, it also questions the rare attempt at a unified interpretation undertaken by Maruyama Masao. The article suggests that the solution is to understand that Sorai needs to speak from two different perspectives on the Way: the external perspective of the sages who grasp the relationships between the Way and the natural world as purveyor of the raw materials the Way is made of, and the internal perspective of commoners who must accept everything that is in a Way. This permits us to rescue the positivist interpretation of Sorai advanced by Maruyama and much criticized in recent years.     

Perceptual Categorization: Connectionist Modelling and Decision Rules

Although it is currently popular to model human associative learning using connectionist networks, the mechanism by which their output activations are converted to probabilities of response has received relatively little attention. Several possible models of this decision process are considered here, including a simple ratio rule, a simple difference rule, their exponential versions, and a winner-take-all network. Two categorization experiments that attempt to dissociate these models are reported. Analogues of the experiments were presented to a single-layer, feed-forward, delta-rule network. Only the exponential ratio rule and the winner-take-all architecture, acting on the networks' output activations that corresponded to responses available on test, were capable of fully predicting the mean response results. In addition, unlike the exponential ratio rule, the winner-take-all model has the potential to predict latencies. Further studies will be required to determine whether latencies produced under more stringent conditions conform to the model's predictions.