Abstract
The Psychological Problem Inventory (PPI) is a clinical-research instrument designed to provide hospitalized male psychiatric patients with a simple, straightforward means of (a) defining the broad scope of their problems-behaviors-symptoms (b) from their own self-reported point of view (c) in concrete, behavioral terminology. The instrument is described in terms of its purposes, characteristics, derivation, sample items, and supplementary-complementary relationship with checklists and rating scales for the evaluation of symptomatic psychopathology.

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