“…Furthermore, pair and group tests may not always benefit students' performance (Saito, & Miriam, 2004), as aspects like personality (Tsou, 2005), anxiety (Mohammadi, Biria, Koosha, & Shahsavari, 2013) competitiveness, discourse co-construction (Zhang, 2008;Sabet, Tahriri & Pasand, 2013), motivation, learning styles (Tuan, 2011), scales (Hudson, 2005), sex (Azkarai & Mayo, 2012), channel, tester, raters and many others have a powerful effect on the final assessment. Besides, interaction may not be the only way to trigger the candidate's performance and, consequently, both types of tasks seem to be necessary.…”