Paranoid Personality Disorder Test (Revised Green)

This measure assesses the severity and frequency of paranoid thoughts, including ideas of reference and persecutory ideation. Developed by Daniel Freeman and colleagues, the Paranoid Personality Disorder Test uses the Revised Green et al. Paranoid Thoughts Scale (R-GPTS) as a brief self-report screening of suspiciousness-related experiences. The instrument contains 18 items and typically takes about 4 minutes to complete.

Why Take a Paranoid Personality Disorder Test

Suspicious thoughts exist on a wide spectrum — from mild wariness in an unfamiliar situation to persistent, distressing beliefs that others intend harm or are talking behind one's back. Many people who experience frequent suspicious or persecutory thoughts struggle to know whether what they're feeling is ordinary caution, a stress reaction, or something more clinically significant that deserves attention.

A structured test for paranoid personality disorder cuts through this ambiguity. Rather than relying on a vague sense of unease, the R-GPTS asks about two specific, well-defined experiences — persecutory ideation (believing others intend harm or hostility) and ideas of reference (interpreting neutral events as personally directed) — producing separate, quantified scores for each. This specificity matters clinically, since these two dimensions can occur independently and may respond differently to treatment.

This paranoia test is especially useful for people who notice frequent worries that others are watching, discussing, or targeting them, and want a research-based starting point for understanding how strong these beliefs currently are before deciding whether to seek professional evaluation.

What the Assessment Measures

The R-GPTS yields scores across two primary content areas:

• Persecutory ideation — the intensity of beliefs that others intend harm, are targeting the individual, or are treating them with hostility or ill will
• Ideas of reference — the tendency to interpret neutral events, comments, or others' behavior as being specifically and personally directed at oneself

Persecutory ideation is scored 0–40 (0–10 low, 11–27 moderate, 28–40 high), and ideas of reference are scored 0–32 (0–15 low, 16–24 moderate, 25–32 high). Reviewing both scores together produces a fuller picture than either dimension alone, since someone may score high on one and low on the other.

Who This Assessment Is For

This Paranoid Personality Disorder Test is appropriate for anyone who notices frequent worries that others are talking about them, watching them, or intending harm, and wants a clearer picture of how strong these beliefs are. It is also used by clients in therapy intake to help a clinician understand persecutory or referential thinking and plan next steps, and by researchers studying how common and intense paranoid experiences are across different groups.

Clinical Validity and Use in Practice

The R-GPTS has demonstrated strong psychometric properties and established clinical cutoffs across multiple validation studies. It is not a diagnostic tool and should be interpreted alongside clinical interview findings and other relevant assessment data — high scores reflect the intensity of paranoid thoughts, not a formal diagnosis of paranoid personality disorder, which requires a broader pattern of distrust assessed through comprehensive clinical evaluation. Where scores fall in the moderate-to-high range, consultation with a psychologist or psychiatrist is recommended.