Cornoldi and Vecchi tackle this topic in a coherent and systematic fashion, giving a very convincing demonstration of the scientific value to be gained from an individual differences approach. - Robert H. Logie, University of Aberdeen, UKAn excellent appreciation of the many subtle conceptual and practical issues that arise in attempting to investigate the nature and function of mental imagery. The theoretical analysis of visuo-spatial working memory is highly original and constitutes a serious challenge for previous accounts. - John T. Richardson, Open University, UK