Visual masking is a technique used in cognitive research to understand pre-conscious processes (priming, for example), consciousness, visual limits, and perception issues associated with psychopathology. This book is a short format review of research using visual masking, how it has been used, and what these experiments have discovered.Topics covered include concepts, varieties, and theories of masking, masking and microgenetic mechanisms and stagesof visual processing, psychopharmacological and genetic factors in masking, and more.