“…This is important because intellectual factors have been shown to have some power in differentiating good and poor aides (Cliff, Newman, & Howell, 1959;Levine, 1951;Love, 1955). Yerburg, Holzberg, and Alessi (1951) were able to differentially identify 5% of "definitely good" aides and 32% of "definitely poor" aides by use of the revised beta examination and the multiple choice Rorschach. However, they did not report any crossvalidational data.…”