“…As indicated, 9 additional studies investigated the predictive validity of DA without reporting Pearson's correlation coefficients (Bain & Olswang, 1995;Budoff et al, 1976;Budoff et al, 1971;Byrne, Fielding-Barnsley, & Ashley, 2000;Meijer, 1993;Peña et al, 1992;Resing, 1993;Samuels, Killip, MacKenzie, & Fagan, 1992;Swanson, 1994). These studies were grouped into three categories according to their design and analysis: single-subject design with visual analysis (Bain & Olswang, 1995), quasiexperimental design with multiple regression analysis (Budoff et al, 1976;Byrne et al, 2000;Meijer, 1993;Resing, 1993;Swanson, 1994), and experimental design with between-group comparisons (Budoff et al, 1971;Peña et al, 1992;Samuels et al, 1992).…”