“…Of the 8 studies that reported information on degrees, 830 (64%) participants had doctorates. The participants varied in their professional backgrounds, and included supervisors who were psychologists (Vidlak, 2002;Watkins et al, 1995), supervisors from university counseling centers (Hillman et al, 1998), marriage and family therapists (Bencivenne, 1999), doctoral students (Baker, Exum, & Tyler, 2002), predoctoral interns (Lyon et al, 2008), counseling education supervisors (Barnes, 2002;Pelling, 2008), substance abuse counselor supervisors (Culbreth & Cooper, 2008), and genetic counselors (Lee, Veach, & LeRoy, 2009). Mean years of supervision experience was 10.2 across the 7 studies that reported this data.…”