Sympatric Speciation: When Is It Possible in Bacteria?
This study investigated a potential auditory illusion in duration perception induced by rhythmic temporal contexts. Listeners with or without musical training performed a duration discrimination task for a silent period in a rhythmic auditory sequence. The critical temporal interval was presented ei...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Public Library of Science
2013
|
| Online Access: | http://hdl.handle.net/1721.1/77213 https://orcid.org/0000-0002-7796-7872 https://orcid.org/0000-0003-1158-5692 |
| _version_ | 1811093697387823104 |
|---|---|
| author | Geiser, Eveline Gabrieli, John D. E. |
| author2 | Massachusetts Institute of Technology. Department of Brain and Cognitive Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Brain and Cognitive Sciences Geiser, Eveline Gabrieli, John D. E. |
| author_sort | Geiser, Eveline |
| collection | MIT |
| description | This study investigated a potential auditory illusion in duration perception induced by rhythmic temporal contexts. Listeners with or without musical training performed a duration discrimination task for a silent period in a rhythmic auditory sequence. The critical temporal interval was presented either within a perceptual group or between two perceptual groups. We report the just-noticeable difference (difference limen, DL) for temporal intervals and the point of subjective equality (PSE) derived from individual psychometric functions based on performance of a two-alternative forced choice task. In musically untrained individuals, equal temporal intervals were perceived as significantly longer when presented between perceptual groups than within a perceptual group (109.25% versus 102.5% of the standard duration). Only the perceived duration of the between-group interval was significantly longer than its objective duration. Musically trained individuals did not show this effect. However, in both musically trained and untrained individuals, the relative difference limens for discriminating the comparison interval from the standard interval were larger in the between-groups condition than in the within-group condition (7.3% vs. 5.6% of the standard duration). Thus, rhythmic grouping affected sensitivity to duration changes in all listeners, with duration differences being harder to detect at boundaries of rhythm groups than within rhythm groups. Our results show for the first time that temporal Gestalt induces auditory duration illusions in typical listeners, but that musical experts are not susceptible to this effect of rhythmic grouping. |
| first_indexed | 2024-09-23T15:49:12Z |
| format | Article |
| id | mit-1721.1/77213 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T15:49:12Z |
| publishDate | 2013 |
| publisher | Public Library of Science |
| record_format | dspace |
| spelling | mit-1721.1/772132022-09-29T16:20:34Z Sympatric Speciation: When Is It Possible in Bacteria? Geiser, Eveline Gabrieli, John D. E. Massachusetts Institute of Technology. Department of Brain and Cognitive Sciences McGovern Institute for Brain Research at MIT Geiser, Eveline Gabrieli, John D. E. This study investigated a potential auditory illusion in duration perception induced by rhythmic temporal contexts. Listeners with or without musical training performed a duration discrimination task for a silent period in a rhythmic auditory sequence. The critical temporal interval was presented either within a perceptual group or between two perceptual groups. We report the just-noticeable difference (difference limen, DL) for temporal intervals and the point of subjective equality (PSE) derived from individual psychometric functions based on performance of a two-alternative forced choice task. In musically untrained individuals, equal temporal intervals were perceived as significantly longer when presented between perceptual groups than within a perceptual group (109.25% versus 102.5% of the standard duration). Only the perceived duration of the between-group interval was significantly longer than its objective duration. Musically trained individuals did not show this effect. However, in both musically trained and untrained individuals, the relative difference limens for discriminating the comparison interval from the standard interval were larger in the between-groups condition than in the within-group condition (7.3% vs. 5.6% of the standard duration). Thus, rhythmic grouping affected sensitivity to duration changes in all listeners, with duration differences being harder to detect at boundaries of rhythm groups than within rhythm groups. Our results show for the first time that temporal Gestalt induces auditory duration illusions in typical listeners, but that musical experts are not susceptible to this effect of rhythmic grouping. Ellison Medical Foundation Swiss National Science Foundation (PA00P1_131448/1) 2013-02-27T17:08:47Z 2013-02-27T17:08:47Z 2013-01 2012-09 Article http://purl.org/eprint/type/JournalArticle 1932-6203 http://hdl.handle.net/1721.1/77213 Friedman, Jonathan, Eric J. Alm, and B. Jesse Shapiro. “Sympatric Speciation: When Is It Possible in Bacteria?” Ed. Simone Immler. PLoS ONE 8.1 (2013). https://orcid.org/0000-0002-7796-7872 https://orcid.org/0000-0003-1158-5692 en_US http://dx.doi.org/10.1371/journal.pone.0053539 PLoS ONE Creative Commons Attribution http://creativecommons.org/licenses/by/2.5/ application/pdf Public Library of Science PLoS |
| spellingShingle | Geiser, Eveline Gabrieli, John D. E. Sympatric Speciation: When Is It Possible in Bacteria? |
| title | Sympatric Speciation: When Is It Possible in Bacteria? |
| title_full | Sympatric Speciation: When Is It Possible in Bacteria? |
| title_fullStr | Sympatric Speciation: When Is It Possible in Bacteria? |
| title_full_unstemmed | Sympatric Speciation: When Is It Possible in Bacteria? |
| title_short | Sympatric Speciation: When Is It Possible in Bacteria? |
| title_sort | sympatric speciation when is it possible in bacteria |
| url | http://hdl.handle.net/1721.1/77213 https://orcid.org/0000-0002-7796-7872 https://orcid.org/0000-0003-1158-5692 |
| work_keys_str_mv | AT geisereveline sympatricspeciationwhenisitpossibleinbacteria AT gabrielijohnde sympatricspeciationwhenisitpossibleinbacteria |