Introduction
The Personality Diagnostic Questionnaire (PDQ-4+) is a free online screening tool for personality disorders. In psychology, personality disorders are generally considered an intermediate state between mental illness and normal psychological functioning. The PDQ-4+ is developed based on the DSM-IV diagnostic criteria for personality disorders and serves as a screening instrument. This questionnaire has been used as one of the tools to assess various mental health populations and can be used for self-examination or group screening.
The PDQ-4+ personality disorder test covers 12 types of personality disorders: Paranoid, Schizoid, Schizotypal, Antisocial, Borderline, Histrionic, Narcissistic, Avoidant, Dependent, Obsessive-Compulsive, Passive-Aggressive, and Depressive.
In psychology, there is a relationship between personality traits and mental state. Personality disorders can become predisposing factors or triggers for mental illness; certain personality traits may represent latent or residual manifestations of mental disorders; personality disorders and clinical syndromes may share common constitutional and environmental backgrounds, and can coexist without necessarily having a causal relationship.
Test Result Interpretation
| Factor | Description | |
|---|---|---|
| Paranoid | Score ≥4 indicates abnormality. Paranoid personality disorder, also called delusional personality disorder, is characterized by suspicion and paranoia. Patients show hypersensitivity, narrow-mindedness, often pathological jealousy, inability to forgive others' mistakes, and excessive sensitivity to criticism or setbacks. | |
| Schizoid | Score ≥4 indicates abnormality. Patients with schizoid personality disorder are socially isolated, emotionally cold, lacking interest and ability in interpersonal relationships, thus unable to establish close connections, resulting in social adaptation difficulties. | |
| Schizotypal | Score ≥5 indicates abnormality. Schizotypal personality disorder is more severe than schizoid, featuring not only social isolation but also perceptual distortions and thought disorders similar to schizophrenia. Manifestations include eccentric beliefs/behavior/appearance, emotional coldness, interpersonal deficits, introversion, expressionless demeanor, insensitivity to human warmth, and disinterest in sexual relationships. | |
| Antisocial | Score ≥3 indicates abnormality. Antisocial personality disorder (sociopathy) has the most severe social impact. All behaviors are self-centered, disregarding social norms and others' rights - a harmful personality type. Characteristics include impulsive/unplanned actions; low frustration tolerance leading to irritability and violence; lack of guilt when harming others; inability to learn from experience. | |
| Borderline | Score ≥5 indicates abnormality. Borderline personality disorder involves more severe emotional distress than other types, with complex symptoms between neurosis and psychosis (hence "borderline"). Main features: high impulsivity, emotional instability, tense relationships, identity disturbance, chronic emptiness/boredom, recurrent self-harm/suicide attempts, prone to transient psychotic episodes. | |
| Histrionic | Score ≥5 indicates abnormality. Histrionic personality disorder (dramatic/hysterical/attention-seeking type) features childishness, mood swings, affectation, exaggerated unstable emotions, constant need for attention, dramatic behavior to attract notice, craving admiration, and lack of consideration for others. | |
| Narcissistic | Score ≥5 indicates abnormality. Narcissistic personality disorder (egoistic type) shows childishness and extreme self-centeredness, often boasting to gain attention. Core symptom is egocentrism - arrogance, exploitation, loose thinking, grandiosity, rationalization. Lacks empathy, highly envious, with poor relationships. | |
| Avoidant | Score ≥4 indicates abnormality. Avoidant personality disorder (anxious type) features long-term comprehensive social withdrawal, especially avoiding occupations requiring extensive interaction. Patients feel chronically tense, apprehensive, insecure, and inferior. Hypersensitive in relationships, desiring acceptance but fearing rejection damages self-esteem, leading to ambivalent social avoidance. | |
| Dependent | Score ≥5 indicates abnormality. Dependent personality disorder lacks confidence and independence, feeling helpless and incompetent, preferring subordinate positions where others make decisions. Childish personality, relying entirely on others' support, experiencing extreme fear when forced to act independently. | |
| Obsessive-Compulsive | Score ≥4 indicates abnormality. Obsessive-compulsive personality disorder shows excessive caution, rigidity, perfectionism, and inner insecurity. Characteristics: inflexible, rule-bound behavior, inability to adapt to change. Overly doubtful, constantly anticipating misfortune; perfectionistic focus on trivial details; harsh self-standards lacking satisfaction; frequent checking for mistakes. | |
| Passive-Aggressive | Score ≥4 indicates abnormality. Passive-aggressive personality disorder expresses strong aggression indirectly - superficially compliant but uncooperative, stubborn, procrastinating, and sabotaging progress. Despite intense hostility, patients conceal these feelings; while complaining constantly, they secretly desire to depend on authority figures. | |
| Depressive | Score ≥5 indicates abnormality. Depressive personality disorder features pessimism, negative outlook, dwelling in melancholy, and excessive worry over minor matters. | |
| Note: Scores exceeding thresholds indicate screening positivity for potential personality disorders, with greater deviations suggesting more severe conditions. As this is only an auxiliary screening tool, results should be interpreted cautiously. | ||