Existing theories of stereotype change have often made use of categorisation principles in order to provide qualitative explanations for both the revision and maintenance of stereotypical beliefs. The present paper examines the quantitative methods underlying these explanations, contrasting both rational and heuristic models of stereotype change using participant data and model fits. In a compa...

In this paper, we investigate the usefulness of the reject option in text categorisation systems. The reject option is introduced by allowing a text classifier to withhold the decision of assigning or not a document to any subset of categories, for which the decision is considered not sufficiently reliable. To automatically handle rejections, a two-stage classifier architecture is used, in whic...

The recent success of the Semantic Web in research, technology and standardisation communities has also resulted in a large variety of different standards, technologies and tools. This diversity and heterogeneity goes along with an increasing complexity in assessing, evaluating, selecting and combining different approaches for the development of Semantic Web Applications (SWA). With this work w...

Numerous proposals have been put forward concerning the nature of human category representations, ranging from rules to exemplars to prototypes. However, it is unlikely that a single, fixed form of representation is sufficient to account for the flexibility of human categories. In this chapter, we describe an alternative to these fixed-representation accounts based on the principle of adaptive ...

A considerable amount of research has been undertaken to establish how end users interpret, understand and verify data models often with the motivation of improving understanding, accuracy and completeness. However, there is relatively little research examining how and why humans make categorisation decisions when developing information systems. The research question addressed in this paper is:...

Redundancy gain refers to the performance enhancements often associated with the presentation of redundant versus single targets (for example, faster, more accurate, or more forceful responses). Though predominantly observed in relatively simple tasks (e.g., stimulus detection), there have been some efforts to investigate similar phenomena in tasks involving higher level processing. We conducte...

The role of configural information in gender categorisation was studied by aligning the top half of one face with the bottom half of another. The two faces had the same or different genders. Experiment 1 shows that participants were slower and made more errors in categorising the gender in either half of these composite faces when the two faces had a different gender, relative to control condit...

Personnel rostering has received ample attention in recent years. Due to its social and economic relevance and due to its intrinsic complexity, it has become a major subject for scheduling and timetabling researchers. Among the personnel rostering problems, nurse rostering turned out to be particularly complex and difficult. In this paper, we propose a notation for nurse rostering problems alon...