Audience Design in Multiparty Conversation

How do speakers design what they say in order to communicate effectively with groups of addressees who vary in their background knowledge of the topic at hand? Prior findings indicate that when a speaker addresses a pair of listeners with discrepant knowledge, that speakers Aim Low, designing their utterances for the least knowledgeable of the two addressees. Here, we test the hypothesis that speakers will depart from an Aim Low approach in order to efficiently communicate with larger groups of interacting partners. Further, we ask whether the cognitive demands of tracking multiple conversational partners' perspectives places limitations on successful audience design. We find that speakers can successfully track information about what up to four of their partners do and do not know in conversation. When addressing groups of 3–4 addressees at once, speakers design language based on the combined knowledge of the group. These findings point to an audience design process that simultaneously represents the perspectives of multiple other individuals and combines these representations in order to design utterances that strike a balance between the different needs of the individuals within the group.     

Perceptual learning in maze discriminations

In Experiment 1, rats were trained on a discrimination between rubber- and sandpaper-covered arms of a maze after one group had been pre-exposed to these intra-maze cues. Pre-exposure facilitated subsequent discrimination learning, unless the discrimination was made easier by adding further discriminative stimuli, when it now significantly retarded learning. In Experiment 2, rats were trained on an extra-maze spatial discrimination, again after one group, but not another, had been pre-exposed to the extra-maze landmarks. Here too, pre-exposure facilitated subsequent discrimination learning, unless the discrimination was made substantially easier by arranging that the two arms between which rats had to choose were always separated by 135°. The results of both experiments can be explained by supposing that perceptual learning depends on the presence of features common to S+ and S-.     

International Applications of Computer-based Testing and Interpretation

The computer has been used to administer, score and interpret psychological tests in a number of countries throughout the world. This paper traces early work in the United States, Great Britain and continental Europe and reviews the current international status of computer-assisted psychological testing. Several problems with transporting existing computer-based psychological testing technology across languages and cultures are discussed.
Les ordinateurs sont utilisés pour administrer, noter et interpréter les tests psychologiques dans un certain nombre de pays du monde entier. Cet article évoque les travaux réalisés aux Etats-Unis, en Grande Bretagne et en Europe Occidentale, et passe en revue les données du courant international en la matière. Plusieurs problèmes technologiques sont soulevés par la diffusion de ces tests, notamment sur les plans du langage et de la culture.