In this volume, originally published in 1978, the authors survey the historical and contemporary research literature pertaining to two-dimensional visual-geometric illusions. They bring together much of the known data, summarising and evaluating theories that have been offered to explain these phenomena. Coren and Girgus provide a new conceptual framework that suggest that visual illusions are not unitary phenomena. Within this framework, illusions do not represent a breakdown in normal perceptual processing. Rather, it is proposed that each illusion is produced by a number of mechanisms operating at different levels in the visual information processing system. The book contains an extensive collection of illusion figures. It will be essential reading for all of those concerned with vision and visual perception, since it integrates the study of illusions into the main body of psychological and perceptual theories at the time.

An Inspector Alvarez novel.

Cam and Alex are now able read people's minds. It's bringing them closer together, but it's forcing Cam and her best friend, Beth, apart. Beth has been hanging out with Helping Hands, a group that's all about doing good things--but it seems to have a shady side as well. When Alex sneaks out to the group's all-night party, she and Beth suddenly are in danger.

In this title, first published in 1978, the authors survey the historical and contemporary research relating to two-dimensional visual-geometric illusions. They summarise and evaluate theories offered to explain these phenomena. Then provide a new conceptual framework suggesting that visual illusions are not unitary phenomena.

In this volume, originally published in 1978, the authors survey the historical and contemporary research literature pertaining to two-dimensional visual-geometric illusions. They bring together much of the known data, summarising and evaluating theories that have been offered to explain these phenomena. Coren and Girgus provide a new conceptual framework that suggest that visual illusions are not unitary phenomena. Within this framework, illusions do not represent a breakdown in normal perceptual processing. Rather, it is proposed that each illusion is produced by a number of mechanisms operating at different levels in the visual information processing system. The book contains an extensive collection of illusion figures. It will be essential reading for all of those concerned with vision and visual perception, since it integrates the study of illusions into the main body of psychological and perceptual theories at the time.