Much of the work that has been done to the present in exploring age differences in the assessment of depression has utilized normally aging populations. This research has indicated that present depresion scales may yield many false positives for depression because of the large number of somatic items that these scales contain. An important question is whether this same finding would hold in psychiatric populations, which are the ones most likely to be subject to diagnosis. The present study was designed to supply information in that area. The D‐scale responses of the MMPI for 6,964 patients were factor‐analyzed. Results indicated significant differences in the expression of depression for three age groups–20‐39, 40–59 and 60+ years. A central core of items that accounted for one‐half of the variances for all three groups was found. Additional items appeared across the age groups with greater to lesser significance in terms of the variance accounted for producing distinct qualitative differences. Concern over declining physical well‐being was not part of the central core of depression for the older group in this psychiatric population.
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