TY - THES A1 - Götz, Antonia T1 - Patterns of perceptual reorganization in infancy T1 - Muster der Wahrnehmungsorganisation im Säuglingsalter BT - decline, maintenance, and u shaped development BT - Abnahme, Aufrechterhaltung und U-Förmige Entwicklung N2 - Previous behavioral studies showed that perceptual changes in infancy can be observed in multiple patterns, namely decline (e.g., Mattock et al., 2008; Yeung et al., 2013), maintenance (e.g., Chen & Kager, 2016) and U-shaped development (Liu & Kager, 2014). This dissertation contributes further to the understanding of the developmental trajectory of phonological acquisition in infancy. The dissertation addresses the questions of how the perceptual sensitivity of lexical tones and vowels changes in infancy and how different experimental procedures contribute to our understanding. We used three experimental procedures to investigate German-learning infants’ discrimination abilities. In Studies 1 and 3 (Chapters 5 and 7) we used behavioral methods (habituation and familiarization procedures) and in Study 2 (Chapter 6) we measured neural correlates. Study 1 showed a U-shaped developmental pattern: 6- and 18-month-olds discriminated a lexical tone contrast, but not the 9-month-olds. In addition, we found an effect of experimental procedure: infants discriminated the tone contrast at 6 months in a habituation but not in a familiarization procedure. In Study 2, we observed mismatch responses (MMR) to a non-native tone contrast and a native-like vowel in 6- and 9-month-olds. In 6-month-olds, both contrasts elicited positive MMRs. At 9 months, the vowel contrast elicited an adult-like negative MMR, while the tone contrast elicited a positive MMR. Study 3 demonstrated a change in perceptual sensitivity to a vowel contrast between 6 and 9 months. In contrast to the 6-month-old infants, the 9-month-old infants discriminated the tested vowel contrast asymmetrically. We suggest that the shifts in perceptual sensitivity between 6 and 9 months are functional rather than perceptual. In the case of lexical tone discrimination, infants may have already learned by 9 months of age that pitch is not relevant at the lexical level in German, since the infants in Study 1 showed no perceptual sensitivity to the contrast tested. Nevertheless, the brain responded to the contrast, especially since pitch differences are also part of the German intonation system (Gussenhoven, 2004). The role of the intonation system in pitch discrimination could be supported by the recovery of behavioral discrimination at 18 months of age, as well as behavioral and neural discrimination in German-speaking adults. N2 - Frühere Verhaltensstudien haben gezeigt, dass Wahrnehmungsveränderungen im Säuglingsalter in verschiedenen Mustern beobachtet werden können, nämlich Rückgang (z. B. Mattock et al., 2008; Yeung et al., 2013), Aufrechterhaltung (z. B. Chen & Kager, 2016) und U-förmige Entwicklung (Liu & Kager, 2014). Diese Dissertation leistet einen weiteren Beitrag zum Verständnis des Entwicklungsverlaufs des phonologischen Erwerbs im Säuglingsalter und befasst sich mit den Fragen, wie sich die Wahrnehmungssensitivität von lexikalischen Tönen und Vokalen im Säuglingsalter verändert und wie verschiedene experimentelle Verfahren zu unserem Verständnis beitragen. Wir haben drei experimentelle Verfahren verwendet, um die Diskriminationsfähigkeiten von Deutsch lernenden Säuglingen zu untersuchen. In den Studien 1 und 3 (Kapitel 5 und 7) verwendeten wir Verhaltensmethoden (Habituierungs- und Familiarisierungsverfahren) und in Studie 2 (Kapitel 6) maßen wir neuronale Korrelate. Studie 1 zeigten ein U-förmiges Entwicklungsmuster: mit 6 und 18 Monaten unterschieden Kinder einen lexikalischen Tonkontrast, aber nicht mit 9 Monaten. Darüber hinaus fanden wir einen Effekt des experimentellen Verfahrens: Säuglinge unterschieden einen lexikalischen Tonkontrast mit 6 Monaten in einem Habituierungs-, aber nicht in einem Familiarisierungsverfahren. In Studie 2 beobachteten wir mismatch responses (MMR) auf einen nicht-muttersprachlichen Tonkontrast und auf einen muttersprachlichen Vokal bei 6 und 9 Monate alten Säuglingen. Die 6 Monate alten Säuglingen zeigten positive MMRs für beide Kontraste. Mit 9 Monaten löste der Tonkontrast eine positive MMR aus, während der Vokalkontrast eine erwachsenenähnliche negative MMR hervorrief. Studie 3 zeigte eine Veränderung der Wahrnehmungsempfindlichkeit für einen Vokalkontrast zwischen 6 und 9 Monaten. Im Gegensatz zu den 6 Monate alten Säuglingen unterschieden die 9 Monate alten Säuglinge den getesteten Vokalkontrast asymmetrisch. Wir vermuten, dass die Verschiebungen in der Wahrnehmungsempfindlichkeit zwischen 6 und 9 Monaten vielmehr funktionell als wahrnehmungsbezogen sind. Im Fall der lexikalischen Tonunterscheidung haben die Säuglinge im Alter von 9 Monaten möglicherweise bereits gelernt, dass die Tonhöhe auf der lexikalischen Ebene im Deutschen nicht relevant ist, da die Säuglinge in Studie 1 keine Wahrnehmungssensitivität für den getesteten Kontrast zeigten. Dennoch reagierte das Gehirn auf den Kontrast, zumal Tonhöhenunterschiede auch Teil des deutschen Intonationssystems sind (Gussenhoven, 2004). Die Rolle des Intonationssystems bei der Tonhöhendiskriminierung könnte durch die Wiederherstellung der Verhaltensdiskriminierung im Alter von 18 Monaten sowie durch die Verhaltens- und neuronale Diskriminierung bei deutschsprachigen Erwachsenen untermauert werden. KW - perceptual reorganization KW - infancy KW - lexical tones KW - vowels KW - experimental procedure KW - perzeptuelle Reorganisation KW - Säuglingsalter KW - lexikalische Töne KW - Vokale KW - experimentelle Verfahren Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-536185 ER - TY - JOUR A1 - Götz, Antonia A1 - Yeung, H. Henny A1 - Krasotkina, Anna A1 - Schwarzer, Gudrun A1 - Höhle, Barbara T1 - Perceptual Reorganization of Lexical Tones BT - Effects of Age and Experimental Procedure JF - Frontiers in Psychology N2 - Findings on the perceptual reorganization of lexical tones are mixed. Some studies report good tone discrimination abilities for all tested age groups, others report decreased or enhanced discrimination with increasing age, and still others report U-shaped developmental curves. Since prior studies have used a wide range of contrasts and experimental procedures, it is unclear how specific task requirements interact with discrimination abilities at different ages. In the present work, we tested German and Cantonese adults on their discrimination of Cantonese lexical tones, as well as German-learning infants between 6 and 18 months of age on their discrimination of two specific Cantonese tones using two different types of experimental procedures. The adult experiment showed that German native speakers can discriminate between lexical tones, but native Cantonese speakers show significantly better performance. The results from German-learning infants suggest that 6- and 18-month-olds discriminate tones, while 9-month-olds do not, supporting a U-shaped developmental curve. Furthermore, our results revealed an effect of methodology, with good discrimination performance at 6 months after habituation but not after familiarization. These results support three main conclusions. First, habituation can be a more sensitive procedure for measuring infants' discrimination than familiarization. Second, the previous finding of a U-shaped curve in the discrimination of lexical tones is further supported. Third, discrimination abilities at 18 months appear to reflect mature perceptual sensitivity to lexical tones, since German adults also discriminated the lexical tones with high accuracy. KW - perceptual reorganization KW - lexical tones KW - U-shaped curve KW - habituation KW - familiarization Y1 - 2018 U6 - https://doi.org/10.3389/fpsyg.2018.00477 SN - 1664-1078 VL - 9 SP - 1 EP - 16 PB - Frontiers Research Foundation CY - Lausanne ER - TY - GEN A1 - Götz, Antonia A1 - Yeung, H. Henny A1 - Krasotkina, Anna A1 - Schwarzer, Gudrun A1 - Höhle, Barbara T1 - Perceptual Reorganization of Lexical Tones BT - Effects of Age and Experimental Procedure T2 - Postprints der Universität Potsdam : Humanwissenschaftliche Reihe N2 - Findings on the perceptual reorganization of lexical tones are mixed. Some studies report good tone discrimination abilities for all tested age groups, others report decreased or enhanced discrimination with increasing age, and still others report U-shaped developmental curves. Since prior studies have used a wide range of contrasts and experimental procedures, it is unclear how specific task requirements interact with discrimination abilities at different ages. In the present work, we tested German and Cantonese adults on their discrimination of Cantonese lexical tones, as well as German-learning infants between 6 and 18 months of age on their discrimination of two specific Cantonese tones using two different types of experimental procedures. The adult experiment showed that German native speakers can discriminate between lexical tones, but native Cantonese speakers show significantly better performance. The results from German-learning infants suggest that 6- and 18-month-olds discriminate tones, while 9-month-olds do not, supporting a U-shaped developmental curve. Furthermore, our results revealed an effect of methodology, with good discrimination performance at 6 months after habituation but not after familiarization. These results support three main conclusions. First, habituation can be a more sensitive procedure for measuring infants' discrimination than familiarization. Second, the previous finding of a U-shaped curve in the discrimination of lexical tones is further supported. Third, discrimination abilities at 18 months appear to reflect mature perceptual sensitivity to lexical tones, since German adults also discriminated the lexical tones with high accuracy. T3 - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - 433 KW - perceptual reorganization KW - lexical tones KW - U-shaped curve KW - habituation KW - familiarization Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-411759 IS - 433 ER -