| Abstract: | Reports an error in "Effects of the build-up and resetting of auditory stream segregation on temporal discrimination" by Brian Roberts, Brian R. Glasberg and Brian C. J. Moore (Journal of Experimental Psychology: Human Perception and Performance, 2008Aug], Vol 344], 992-1006). The year listed is incorrect. The article should have been dated 2008. (The following abstract of the original article appeared in record 2008-09670-016.) The tendency to hear a tone sequence as 2 or more streams (segregated) builds up, but a sudden change in properties can reset the percept to 1 stream (integrated). This effect has not hitherto been explored using an objective measure of streaming. Stimuli comprised a 2.0-s fixed-frequency inducer followed by a 0.6-s test sequence of alternating pure tones (3 low L]-high H] cycles). Listeners compared intervals for which the test sequence was either isochronous or the H tones were slightly delayed. Resetting of segregation should make identifying the anisochronous interval easier. The HL frequency separation was varied (0-12 semitones), and properties of the inducer and test sequence were set to the same or different values. Inducer properties manipulated were frequency, number of onsets (several short bursts vs. one continuous tone), tone:silence ratio (short vs. extended bursts), level, and lateralization. All differences between the inducer and the L tones reduced temporal discrimination thresholds toward those for the no-inducer case, including properties shown previously not to affect segregation greatly. Overall, it is concluded that abrupt changes in a sequence cause resetting and improve subsequent temporal discrimination. (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
