Over the past decades, a large body of research has examined students' magnitudes of evolution acceptance and related measurement issues resulting in questions concerning instruments' validity and operationalization. Until now, several studies investigated validity aspects of often-used evolution acceptance instruments and came to diverging…

This study examined age differences in young people's understanding of evolution theory in secondary school. A second aim of this study was to propose a new coding scheme that more accurately described students' conceptual understanding about evolutionary theory. We argue that coding schemes adopted in previous research may have overestimated…