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| Untersuchte Arbeit: Seite: 43, Zeilen: 21-29 |
Quelle: Hammond 1982 Seite(n): 109, Zeilen: 6-38 |
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| Für eine komplexere Ebene der zeitlichen Verarbeitung, der Beurteilung von Dauer nämlich, fanden MILLS & ROLLMAN (1979) bei monotischer Darbietung visueller Reize und Klicks Hinweise darauf, daß ein ISI von bis zu 50 ms bevorzugt in der linken Hemisphäre, längere Intervalle bis zu 100 ms dagegen in beiden Hemisphären verarbeitet werden, und daß für Intervalle zwischen 210 und 290 ms ein LV besteht. Eine Studiе, die versuchte, diese Ergebnisse mit unregelmäßig monotisch präsentierten Kick- und Lichtreizserien zu reproduzieren, zeigte aber für beide Hemisphären keine Unterschiede in der Genauigkeit der zeitlichen Auflösung (VROON et al., 1977). | In related work (Mills & Rollman, 1979) they reported a right-ear –and presumably left-hemispheric-- superiority under some conditions of tasks which required judgments of filled and unfilled acoustic duration. In their first experiment, subjects were required to press a switch at the judged offset of a train of clicks which were delivered to either the left or right ear at a regular ISI of 40, 50, 67, or 100 msec. Responding hand was counterbalanced across conditions. Reaction time was shown to be reliably faster (around 6-8 msec) with the clicks delivered to the right ear at the two shorter ISIS. No differences were found at the two longer intervals [...] In a second experiment, they studied ear differences in judgment of duration more directly. Each trial consisted of binaural presentation of a standard-duration acoustic burst (250 msec of 1-msec square pulses delivered at 50 pps) followed 2.5 set later by the comparison duration (either 210, 230, 250, 270, or 290 msec) which was delivered to either the left or right ear. Subjects were required to judge whether the comparison duration was longer, shorter, or equal in duration to the standard. A right-ear advantage (REA) was found when the comparison stimulus was the same duration or longer than the standard stimulus [...] A study of reproduction of longer durations (20, 40, and 60 set) defined by lateralized trains of irregularly presented clicks or light flashes failed to show any differences in accuracy as a function of sensory field (Vroon, Timmers, & Tempelaars, 1977). |
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