1. COSMIC, University of Massachusetts at Boston, Boston, Massachusetts, USA
2. Education Development Center, Inc, Waltham, Massachusetts, USA
3. Graduate School of Education, Harvard University, Cambridge, Massachusetts, USA
4. Department of Educational Psychology, University of Minnesota, Minneapolis, Minnesota, USA
5. Hector Research Institute of Education Sciences and Psychology, University of Tübingen, Tübingen, Germany
6. School of Education, University of Michigan, Ann Arbor, Michigan, USA