“…Besides, educational literature lacks models of effective teamwork (den Bossche, Gijselaers, Segers, & Kirschner, 2006).This lack of evidence contradicts with ample data showing that group operation (e.g. team communication and co-operation, Davies & Kanaki, 2006) and group effectiveness largely depend on the personality characteristics among group members (Barrick & Mount, 1991;1993;Halfhill, Sundstrom, Lahner, Calderone, & Nielsen, 2005;Peeters, Van Tuijl, Rutte, & Reymen, 2006). The Big Five model (Costa & McCrae, 1992) is the most well-known and scientifically rigorous one in exploring group personality diversity on the basis of five parsimonious traits, namely openness to experience, conscientiousness, extraversion, agreeableness, and neuroticism.…”