We investigated how differently structured external scripts interact with learners' internal scripts concerning individual knowledge acquisition in a Web-based collaborative inquiry learning environment. 90 students from two secondary schools participated. Two versions of an external collaboration script (high vs. low structured) supporting collaborative argumentation were embedded within a Web-based collaborative inquiry learning environment. Students' internal scripts were classified as either high or low structured, establishing a 2x2-factorial design. Results suggest that the high structured external collaboration script supported the acquisition of domain-general knowledge of all learners regardless of their internal scripts. Learners' internal scripts influenced the acquisition of domain-specific knowledge. Results are discussed concerning their theoretical relevance and practical implications for Web-based inquiry learning with collaboration scripts.Keywords: Collaboration scripts, internal scripts, computer-supported collaborative learning, inquiry learning, science education, learning environments.
Internal and External Scripts 4 4 Internal and External Scripts in Computer-Supported Collaborative Inquiry LearningOver the last years, several studies have shed light on the way learners benefit from collaboration when learning science (Kaartinen & Kumpulainen, 2002;Kneser & Ploetzner, 2001;Howe, Tolmie, Duchak-Tanner, & Rattray, 2000). There is considerable evidence, however, that students often have difficulty engaging in fruitful collaborative argumentation.For example, they rarely relate scientific evidence to theoretical explanations (e.g., Bell, 2004;Sandoval, 2003). Also, arguments raised by one student often remain unaddressed by the student's learning partner(s), and obvious disagreements are often left unresolved. If not explicitly scaffolded, learners may fail to show substantive argumentation, leading to little acquisition of domain-general knowledge about argumentation. Even more, low-level argumentation might be reflected in poor elaboration of learning content and result in a limited acquisition of domain-specific knowledge.Several instructional approaches have been used by researchers to address these challenges in learning through argumentation (e.g., Bell, 1997;van Bruggen, Kirschner, & Jochems, 2002;Baker, 2003;Munneke, van Amelsvoort, & Andriessen, 2003;Suthers, Toth, & Weiner, 1997). Suthers et al. (1997), for example, developed Belvedere, a graphical argumentation tool by aid of which learners enter hypotheses and evidence into text boxes and specify the relationships between boxes using graphical arrows. This results in a network of nodes and links representing the various pieces of evidence that support or contradict a particular hypothesis. A similar approach has been taken by Bell (1997) in developing the "SenseMaker"-tool to help scaffold students' use of evidence within arguments in Web-based inquiry projects.Another promising approach to structure collaborative argumenta...