According to Jacobs and Johnson (2009) mixed group reviews "add a unique perspective to the process and are sometimes able to see things that other teachers do not" (p. 58).
ɐkˈoːɹdɪŋ tə dʒˈeɪkəbz ænd dʒˈɑːnsən tˈuː θˈaʊzənd nˈaɪn mˈɪkst ɡɹˈuːp ɹᵻvjˈuːz "ˈæd ɐ juːnˈiːk pɚspˈɛktɪv tə ðə pɹˈɑːsɛs ænd ɑːɹ sˈʌmtaɪmz ˈeɪbəl tə sˈiː θˈɪŋz ðæt ˈʌðɚ tˈiːtʃɚz duːnˈɑːt" pˈiː. fˈɪfti ˈeɪt.