The construct validity of the MMPI alexithymia scale with psychiatric inpatients

Relatively few studies have addressed the issue of the Minnesota Multiphasic Personality Inventory (MMPI) alexithymia scale's construct validity. In this study, the validity of the scale is supported by the finding of a significantly lower percentage of alexithymic individuals in a large sample of psychiatric inpatients than in samples of patients with a variety of physical disorders (i.e., migraine headaches, asthma bronchitis/emphysema, and hypertension). Validity of the scale is further supported through a comparison of the alexithymic and nonalexithymic psychiatric inpatients on a series of Rorschach and MMPI variables. As predicted, alexithymics were less verbally productive, displayed less ability to fantasize, and demonstrated greater defensive pseudonormality. Results suggest the measure may be of value in studies of psychiatric patients as well as those with physical disorders.