title: Harmonic context influences pitch class equivalence judgments through gestalt and congruency effects.
abstract: The context in which a stimulus is presented shapes the way it is processed. This effect has been studied extensively in the field of visual perception. Our understanding of how context affects the processing of auditory stimuli is, however, rather limited. Western music is primarily built on melodies (succession of pitches) typically accompanied by chords (harmonic context), which provides a natural template for the study of context effects in auditory processing. Here, we investigated whether pitch class equivalence judgments of tones are affected by the harmonic context within which the target tones are embedded. Nineteen musicians and 19 non-musicians completed a change detection task in which they were asked to determine whether two successively presented target tones, heard either in isolation or with a chordal accompaniment (same or different chords), belonged to the same pitch class. Both musicians and non-musicians were most accurate when the chords remained the same, less so in the absence of chordal accompaniment, and least when the chords differed between both target tones. Further analysis investigating possible mechanisms underpinning these effects of harmonic context on task performance revealed that both a change in gestalt (change in either chord or pitch class), as well as incongruency between change in target tone pitch class and change in chords, led to reduced accuracy and longer reaction times. Our results demonstrate that, similarly to visual processing, auditory processing is influenced by gestalt and congruency effects.
authors.affiliation: Department of Psychology, Faculty of Arts, University of Ljubljana, Aškerčeva 2, 1000 Ljubljana, Slovenia. Electronic address: anka.slana@psy.ff.uni-lj.si.
authors.forename: Anka
authors.initials: A
authors.lastname: Slana
authors.affiliation: Department of Psychology, Faculty of Arts, University of Ljubljana, Aškerčeva 2, 1000 Ljubljana, Slovenia.
authors.forename: Grega
authors.initials: G
authors.lastname: Repovš
authors.affiliation: Department of Cognitive Biology, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria.
authors.forename: W Tecumseh
authors.initials: WT
authors.lastname: Fitch
authors.affiliation: Department of Cognitive Biology, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria. Electronic address: brunogingras@gmail.com.
authors.forename: Bruno
authors.initials: B
authors.lastname: Gingras
mesh_terms: D000161:Acoustic Stimulation / Q000379:methods*; D000328:Adult; D005260:Female; D005863:Gestalt Theory; D006801:Humans; D007600:Judgment; D008297:Male; D009146:Music; D010898:Pitch Perception; D011930:Reaction Time; D013647:Task Performance and Analysis; D055815:Young Adult
keywords: Congruency effect; Gestalt; Harmonic context; Octave equivalence; Pitch class; Pitch perception