Using contrasting cases to relate collaborative processes and outcomes in CSCL. - Nikol Rummel; Cindy E. Hmelo-Silver; Armin Weinberger; Karsten Stegmann; Frank Fischer 001; Dejana Diziol; George Kahrimanis; Talia Guevara; Johannes Holz; Hans Spada; Georgios Fiotakis; Heisawn Jeong; et al. (ICLS (3), 2008)