Originally published in 1982, this book introduces the student to the central problem of all perceptual theories: just how does the perceiver identify particular objects? In focusing on the problem, Dr Wilding provides a coherent, well organized framework for its study, bypassing the conventional split between perception and reaction time evidence which was common to most textbooks at the time.The author draws on evidence from a wider number of research traditions and argues that each has a contribution to make to any account of perception. Throughout he emphasizes the methodological basis of the research discussed, in order to provide students with a solid foundation for their own practical work.