The influence of category coherence on inference about cross-classified entities

A critical function of categories is their use in property inference (Heit, 2000). However, one challenge to using categories in inference is that most entities in the world belong to multiple categories (e.g., Fido could be a dog, a pet, a mammal, or a security system). Building on Patalano, Chin-Parker, and Ross (2006), we tested the hypothesis that category coherence (the extent to which category features go together in light of prior knowledge) influences the selection of categories for use in property inference about cross-classified entities. In two experiments, we directly contrasted coherent and incoherent categories, both of which included cross-classified entities as members, and we found that the coherent categories were used more readily as the source of both property transfer and property extension. We conclude that category coherence, which has been found to be a potent influence on strength of inference for singly classified entities (Rehder & Hastie, 2004), is also central to category use in reasoning about novel cross-classified ones.     

A family therapy workshop: a review of a two-year experiment in a Social Services Department

As family therapy ceases to be regarded as a passing fashion, and becomes recognized as a real therapeutic force, the need for new forms of support and supervision is becoming ever more apparent. This paper describes and evaluates the supervisory system for family therapy set up by an Area Group in a Local Authority Social Services Department and plans to do so in a way which has practical application for workers in a variety of settings.