IPIP-PDS
IPIP Personality Disorder Scales — Dimensional Single-Disorder Scales for All 10 DSM-5-TR PD Categories
Ten IPIP-validated dimensional scales — one per DSM-5-TR personality disorder. Each scale produces a facet-level severity profile rather than a categorical present/absent verdict, so the information captured is proportional to what the disorder actually is: a dimensional variant of normal personality.
All 10 Personality Disorder Scales
Paranoid PD
Distrust and suspiciousness; others’ motives interpreted as malevolent.
Schizoid PD
Social detachment and restricted affective expression. Pairs with the RSAS for anhedonia confirmation.
Schizotypal PD
Odd beliefs, magical thinking, perceptual aberrations, and eccentric behavior.
Antisocial PD
Disregard for and violation of others’ rights. Callousness and deceitfulness.
Borderline PD
Instability of identity, relationships, and affect. Impulsivity and fear of abandonment.
Histrionic PD
Excessive emotionality and attention-seeking. Shallow and rapidly shifting emotions.
Narcissistic PD
Grandiosity, need for admiration, and lack of empathy. Sense of entitlement.
Avoidant PD
Social inhibition, inadequacy feelings, and hypersensitivity to negative evaluation.
Dependent PD
Excessive need to be taken care of; submissive and clinging behavior; fear of separation.
Obsessive-Compulsive PD
Preoccupation with orderliness, perfectionism, and mental and interpersonal control.
Dimensional vs. Categorical Scoring
The IPIP-PDS generates continuous severity scores for each PD category rather than binary present/absent classifications. This dimensional approach is consistent with the empirical literature showing that personality disorder features are continuously distributed in the population, with clinical presentations representing extreme variants of normal personality dimensions rather than categorically distinct taxa.
The dual-track scoring option supports integration with the HiTOP hierarchical taxonomy, mapping PD severity scores onto broad spectra (detachment, antagonism, disinhibition, psychoticism, negative affect).
Recommended Workflow
Pairs naturally with the IPDE-SQ for a two-stage workflow: the IPDE-SQ provides categorical screening (which PDs require interview follow-up?); the IPIP-PDS provides dimensional severity profiles (how severe is the pathology across all ten categories, including those below interview threshold?). Together they provide both the categorical decision support and the dimensional severity information needed for treatment planning.