📄 Cognitive Science paper on reasoning about desires

Hillary Harner and I have a new theoretical paper out in Cognitive Science on the processes and mental representations people rely on to reason about desire. The paper shows that people think of desires as “counterfactive” — A wants X implies that X isn’t the case by default. It also shows that people separate desires from intentions, and that they make systematic reasoning mistakes concerning the predicate “want”.

The abstract of the paper is here:

No present theory explains the inferences people draw about the real world when reasoning about
“bouletic” relations, that is, predicates that express desires, such as want in “Lee wants to be in love”.
Linguistic accounts of want define it in terms of a relation to a desirer’s beliefs, and how its complement is deemed desirable. In contrast, we describe a new model-based theory that posits that by default, desire predicates such as want contrast desires against facts. In particular, A wants P implies by default that P is not the case, because you cannot want what is already true. On further deliberation, reasoners may infer that A believes, but does not know for certain, that P is not the case. The theory makes several empirical predictions about how people interpret, assess the consistency of, and draw conclusions from desire predicates like want. Seven experiments tested and validated the theory’s central predictions. We assess the theory in light of recent proposals of desire predicates.

and it’s available for download here.