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Abstract
Form E of the Sixteen Personality Factors Questionnaire (16PF-E) was administered to 70 adults (45 men and 25 women) who resided in a public facility for mentally retarded persons. Alpha coefficients were computed for each of 16 primary trait scales. The intelligence (B), Ego Strength (C), Dominance (E), Superego Strength, (G), Parmia (H), Protension (L), Autia (M), Shrewdness (N), Guilt Proneness (O), and Self-Sentiment (Q[sub 3]) scales, exhibited low internal consistency, whereas Premsia (I) and Self-Sufficiency (Q[sub 2]) evidenced relatively higher levels. Personality traits of subjects were also assessed by staff ratings. Ratings were compared to 16PF-E primary and secondary trait scores via correlation coefficients. Results provided virtually no support for the validity of the 16PF-E primary scales and the Exvia, Anxiety, and Cortertia secondary factors as applied to the subject population. Limited support for the validity of the independence secondary factor was found.