Applied Vision Association Annual Conference Invariance and constancy in vision 3rd to 5th April 1995, University of Reading, U.K. Problems of visual invariance and constancy have long been of interest to researchers in biological vision, and are becoming of increasing importance in machine vision also. This conference will bring together a range of disciplines which can contribute to an understanding of these problems. The programme will include contributions by researchers such as P Foldiak, DH Foster, JP Frisby, MA Georgeson, AC Hurlbert, JJ Kulikowski, BJ Rogers, RJ Snowden, and NJ Wade on topics such as colour depth, shape and speed constancies in human vision, and how these may be achieved in machine vision. Professor Jan J Koenderink, University of Utrecht, will give the Geoffrey J Burton Memorial Lecture For more information, and to be put on the mailing list for provisional programme and registration details, please contact: Dr John Harris, Tel: +44 734 318522 Department of Psychology, Fax: +44 734 316604 University of Reading, E-mail: sxsharis@uk.ac.reading Reading RG6 2AL, U.K.