Abstract
Zusammenfassung. Diese Studie untersucht wie sich argumentativer Diskurs und individuelles Argumentieren in Bezug auf den Gebrauch von Evidenz unterscheiden. In einem 1 × 2 Cross-over Design diskutierten 37 Mittelstufenschülerinnen und –Schüler ein gesellschaftliches Thema mit ihrem Partner, entweder bevor oder nachdem sie einen kurzen Aufsatz zu ihrer eigenen Meinung verfassten. Als Hintergrundinformationen erhielten sie eine Sammlung qualitativ unterschiedlicher Evidenzen zu dem Themenbereich. Die Dialoge und Aufsätze wurden untersucht in Hinblick auf a) die Art der Evidenz und b) auf welche Weise diese genutzt wurde. Die Ergebnisse zeigen, dass sich die Schülerinnen und Schüler in den Aufsätzen häufiger auf die ihnen gemeinsam vorliegenden Evidenzen beziehen (geteilte Evidenz). In den Dialogen nutzen sie Evidenz hingegen häufiger, um den gegenteiligen Standpunkt zu adressieren und zeigen dabei eine klarere Argumentationslinie. Die Ergebnisse weisen auf eine höhere Effizienz der Dialoge im Vergleich zum individuellen Schreiben hin. Gleichzeitig gibt die Studie erste Hinweise für die Gestaltung von Curricula, die Schülerinnen und Schüler dazu anregen Evidenz in ihrer Argumentation einzusetzen.
Abstract. This study examines how evidence is used differently in argumentative discourse compared to individual arguments. Applying a 1 × 2 crossover study design, 37 secondary school students were asked either to discuss a social issue with their partner before individually writing an essay outlining their opinion or, vice versa, first to discuss and then to write. As background information, they were provided with pieces of evidence with different levels of quality. Dialogs and essays were analyzed regarding (a) the type of evidence and (b) the way evidence was used. Results showed that in their essays students referred more often to the pieces of evidence provided to them (shared evidence). In contrast, they used evidence more often to address the opposing viewpoint in dialogs by incorporating it in a more elaborated (clearer) line of reasoning. Findings suggest that dialogues are a more effective tool than individual writing production, and the study provides first hints regarding how to design curricula that will encourage students to use evidence in a more sophisticated way in their argumentation.
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