Abstract: Fluency - the subjective experience of ease or difficulty associated with information processing – includes perceptual fluency, conceptual fluency, retrieval fluency, so on and so forth. Researchers manipulated perceptual fluency via controlling the figure-ground contrast, font, and clarity of stimuli and found that perceptual fluency has influences on a serial of judgment and decision, such as truth judgment, categorization, preference, familiarity and so on. It is assumed that perceptual fluency can both act as a direct cue and function in an indirect way by selecting various cues and cognitive strategies.

Key words: perceptual fluency, subject experience, judgment, decision, attribution