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This self-report questionnaire screens for subclinical paranoid ideation and suspiciousness in everyday contexts. The Paranoia Scale (PS) uses straightforward statements rated by degree of agreement to characterize mistrustful interpretations and perceived hostile intent.
It consists of 20 items and typically takes about 4 minutes to complete. Responses are summed to yield a total score that can be used for initial clinical formulation, monitoring change over time, or research applications. The measure is attributed here to psytests.org (2025).
The Paranoia Scale (PS) is not a stand-alone diagnostic tool; results should be interpreted in conjunction with clinical interview, collateral information when available, and consideration of cultural and situational factors that may influence endorsed beliefs.