title: Independence and separability of volume and mass in the size-weight illusion.
abstract: Numerous size-weight illusion models were classified in the present article according to general recognition theory (Ashby & Townsend, 1986), wherein the illusion results from a lack of perceptual separability, perceptual independence, decisional separability, or a combination of the three. These options were tested in two experiments in which a feature-complete factorial design and multidimensional signal detection analysis were used (Kadlec & Townsend, 1992a, 1992b). With haptic touch alone, the illusion was associated with a lack of perceptual and decisional separability. When the participant viewed the stimulus in his or her hand, the illusion was associated only with a lack of decisional separability. Visual input appeared to improve the discrimination of mass, leaving only the response bias due to expectation.
authors.affiliation: Department of Psychology, Arizona State University, Tempe, Arizona 85287, USA. crystal.oberle@asu.edu
authors.forename: Crystal D
authors.initials: CD
authors.lastname: Oberle
authors.forename: Eric L
authors.initials: EL
authors.lastname: Amazeen
mesh_terms: D000328:Adult; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D009903:Optical Illusions; D011582:Psychological Theory; D021641:Recognition, Psychology; D012858:Size Perception; D014796:Visual Perception; D014892:Weight Perception