Contents: Part I: Refereed Papers.Invited Presentations, Keynote A ddress: Observations from Studying Cognitive Systems in Context - D. D. Woods, Plenary Speakers: A Picture is Worth a Thousand Words - But That's the Problem L. Gleitman, The Role o f Existing Knowledge in Generalization M. J. Pazzani, Identifying the Modules o f the Mind with fMRI: Imaging the Biological Stages in Visual and Language Processing W . Schneider, Symposia. Index.