His main research interests are writing and literacy development. His research group studies early text production and develops writing interventions. Since 2011, he has been the coordinator of the Special Interest Group on Writing of the European Association for Research on Learning and Instruction. He is also deeply engaged in editorial work and is an associate editor of the journal Reading & Writing: An Interdisciplinary Journal. Currently, he is also chairing the COST Action IS1401, which is establishing the European Literacy Network.