The Clinical Application of MMPI Special Scales/MMPI Supplemental Scale Manual (Book)

Two studies involving a total of 200 participants examined the effect of individual versus group test administration on Rorschach Oral Dependency (ROD) scores. In Study 1, 60 college students completed the ROD scale via a group administration, and 60 students completed individual Rorschach protocols from which ROD scores were derived. Analyses revealed no differences in ROD means and standard deviations and no differences in the form of the ROD score distributions (i.e., skewness and kurtosis) as a function of mode of test administration. Virtually identical results were obtained in Study 2 (N = 80), where a within-participants design was used in lieu of the between-participants design of Study 1. Implications of these findings for the construct validity of the ROD scale are discussed.