During the period from 1963 to 1989, research linked affective states to perceptual processing, showing that mood biases what people categorize, pay attention to, and interpret bodily signals in emotion-related tasks. Methodologies emphasized mood manipulation, appraisal-based explanations, and early perspectives on embodiment, positioning affect as an active driver of perception. A unifying pattern across studies is that affective context constrains perceptual judgments, aligning perceptual processing with current emotional states.