title: The occurrence of the filled duration illusion: a comparison of the method of adjustment with the method of magnitude estimation.
abstract: A time interval between the onset and the offset of a continuous sound (filled interval) is often perceived to be longer than a time interval between two successive brief sounds (empty interval) of the same physical duration. The present study examined whether and how this phenomenon, sometimes called the filled duration illusion (FDI), occurs for short time intervals (40-520 ms). The investigation was conducted with the method of adjustment (Experiment 1) and the method of magnitude estimation (Experiment 2). When the method of adjustment was used, the FDI did not appear for the majority of the participants, but it appeared clearly for some participants. In the latter case, the amount of the FDI increased as the interval duration lengthened. The FDI was more likely to occur with magnitude estimation than with the method of adjustment. The participants who showed clear FDI with one method did not necessarily show such clear FDI with the other method.
authors.affiliation: Université Laval, École de Psychologie, Canada. Electronic address: emi.hasuo.1@ulaval.ca.
authors.forename: Emi
authors.initials: E
authors.lastname: Hasuo
authors.affiliation: Kyushu University, Department of Human Science, Japan.
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Nakajima
authors.affiliation: Kyushu University, Department of Human Science, Japan.
authors.forename: Erika
authors.initials: E
authors.lastname: Tomimatsu
authors.affiliation: Université Laval, École de Psychologie, Canada.
authors.forename: Simon
authors.initials: S
authors.lastname: Grondin
authors.affiliation: Kyushu University, Department of Human Science, Japan.
authors.forename: Kazuo
authors.initials: K
authors.lastname: Ueda
mesh_terms: D000161:Acoustic Stimulation / Q000379:methods; D001307:Auditory Perception / Q000502:physiology*; D005260:Female; D006801:Humans; D007088:Illusions / Q000502:physiology*; D008297:Male; D013997:Time Factors; D013998:Time Perception / Q000502:physiology*
keywords: Cluster analysis; Empty interval; Filled interval; Magnitude estimation; Method of adjustment