The role of impact on the meaning of generic sentences.

Generic sentences (e.g., "Dogs bark") express generalizations about groups or individuals.

Probabilistic causal reasoning under time pressure.

While causal reasoning is a core facet of our cognitive abilities, its time-course has not received proper attention. As the duration of reasoning might prove crucial in understanding the underlying cognitive processes, we asked participants in two experiments to make probabilistic causal inferences while manipulating time pressure. We found that participants are less accurate under time pressure, a speed-accuracy-tradeoff, and that they respond more conservatively.

Generics and Alternatives.

In this paper we argue that for the (probabilistic) interpretation of generic sentences of the form "s are ," three types of alternatives play a role: (i) alternative features of , (ii) alternative groups, or kinds, of , and (iii) alternative causal background factors. In the first part of this paper we argue for the relevance of these alternatives. In the second part, we describe the results of some experiments that empirically tested in particular the second use of alternatives.

Coevolution of Lexical Meaning and Pragmatic Use.

According to standard linguistic theory, the meaning of an utterance is the product of conventional semantic meaning and general pragmatic rules on language use. We investigate how such a division of labor between semantics and pragmatics could evolve under general processes of selection and learning. We present a game-theoretic model of the competition between types of language users, each endowed with certain lexical representations and a particular pragmatic disposition to act on them.