Cognitive alteration of feeling states: Historical background

Within the scientific community there is a growing awareness and acceptance of the notion that people do not exist only in a world of physical forces and events. A person's perception of the world in which they live in a world is also defined by their own perceptions, experiences, and biases. In other words, a person responds and reacts, not only to objective or experimenter-defined stimuli, but also to his or her apperception and subjectively defined stimuli. Reprinted from London, Harvey and Richard E. Nisbett.Thought and Feeling: Cognitive Alteration of Feeling States. Aldine.