Understanding Personality Disorders

Personality disorders involve enduring patterns of thinking, feeling, behaving, and relating to others that differ significantly from cultural expectations and may lead to difficulties in relationships, education, employment, emotional wellbeing, and daily functioning. These patterns are typically longstanding, inflexible across situations, and may cause significant distress or impairment.

Our Personality Disorder Assessment service in Singapore is designed for adolescents and adults who may be experiencing persistent interpersonal, emotional, behavioural, or self-identity difficulties. Assessments are conducted in accordance with contemporary diagnostic frameworks including the DSM-5-TR and ICD-11 Personality Disorder model.

Assessment may be appropriate for concerns associated with:

Borderline Personality Disorder (BPD)
Narcissistic Personality Disorder (NPD)
Histrionic Personality Disorder (HPD)
Antisocial Personality Disorder (ASPD)
Paranoid Personality Disorder
Schizoid Personality Disorder
Schizotypal Personality Disorder
Avoidant Personality Disorder
Dependent Personality Disorder
Obsessive-Compulsive Personality Disorder

These conditions broadly correspond to DSM-5 Cluster A, Cluster B, and Cluster C personality disorders, while ICD-11 conceptualises personality disorders through severity ratings and maladaptive personality trait domains.

Assessment Fee

Personality Disorder Assessment

Fee: SGD $600 (Inclusive of Psychological Report)

The fee includes:

✓ Clinical interview
✓ Psychological testing
✓ Interpretation of findings (inside report)
✓ Diagnostic formulation (inside report)
✓ Written psychological report
✓ Recommendations for intervention and treatment planning (inside report)

Assessment Approach

Personality disorders are complex and frequently overlap with other psychological conditions such as anxiety disorders, depression, trauma-related disorders, ADHD, autism spectrum conditions, mood disorders, and attachment-related difficulties.

Consequently, assessment should not rely on a single questionnaire or screening tool.

Testing batteries are selected based on presenting concerns, developmental history, symptom presentation, and referral objectives.

Standard Assessment Battery

The standard personality assessment battery generally includes:

MMPI-2 or MMPI-3
PID-5

Additional instruments may be administered depending on clinical presentation.

These may include:

Millon Clinical Multiaxial Inventory (MCMI)
Adolescent Millon measures (where clinically indicated)
Borderline Symptom List-23 (BSL-23)
Young Schema Questionnaire (YSQ)
Trauma measures
Emotional regulation measures
Interpersonal functioning inventories
Risk assessments
Supplementary personality inventories

Assessment Process

Stage 1: Clinical Interview

The assessment begins with a detailed clinical interview exploring:

Presenting concerns
Developmental history
Childhood experiences
Family relationships
Attachment patterns
Academic and occupational functioning
Interpersonal difficulties
Emotional regulation patterns
Impulsivity
Identity concerns
Previous psychiatric history
Treatment history
Risk indicators

Stage 2: Psychological Testing

Assessment instruments are selected according to referral questions.

Examples include:

Borderline Personality concerns

MMPI-2/MMPI-3
PID-5
BSL-23
YSQ

Narcissistic or Antisocial concerns

MMPI-2/MMPI-3
PID-5
MCMI
interpersonal functioning measures

Avoidant, Dependent or Obsessive-Compulsive traits

MMPI-2/MMPI-3
PID-5
schema assessment tools
emotional functioning inventories

Stage 3: Integration and Report Writing

Assessment findings are integrated with clinical observations and developmental history to formulate:

Personality trait profile
Emotional functioning
Interpersonal style
Impulse control patterns
Coping mechanisms
Attachment dynamics
Personality disorder severity
Diagnostic impressions
Treatment recommendations

A comprehensive report is subsequently prepared.

Who Is This Assessment Suitable For?

This assessment may be beneficial for adolescents and adults who experience:

chronic relationship instability
repeated interpersonal conflict
emotional volatility
persistent feelings of emptiness
fear of abandonment
unstable self-image
identity confusion
impulsive behaviours
anger dysregulation
manipulative relationship patterns
difficulty maintaining friendships
intense sensitivity to criticism
excessive dependence on others
social withdrawal
suspiciousness
perfectionism
longstanding behavioural difficulties

Assessment may also be helpful for individuals who have been informed by healthcare providers, family members, schools, employers, or therapists that personality-related factors could be contributing to ongoing difficulties.

Assessment in Adolescents

Personality traits continue to develop throughout adolescence and early adulthood.

For this reason, formal personality disorder diagnoses in younger individuals require careful consideration and should only be made when symptoms are persistent, pervasive, clinically significant, and developmentally appropriate.

Assessment in adolescents primarily focuses on:

emerging personality traits
emotional regulation capacities
identity development
interpersonal functioning
attachment styles
coping patterns
behavioural risk factors

The purpose of assessment is not to prematurely label young individuals, but rather to better understand difficulties and facilitate early intervention where appropriate.

Benefits of Personality Disorder Assessment

A comprehensive personality assessment may help individuals:

Improve Self-Understanding

Gain greater insight into longstanding emotional and behavioural patterns.

Clarify Diagnostic Questions

Differentiate personality-related difficulties from conditions such as:

ADHD
Autism Spectrum Disorder
Depression
Anxiety Disorders
Trauma-related conditions
Bipolar Disorder
Adjustment Disorders

Guide Treatment Planning

Assessment findings can inform evidence-based interventions such as:

Dialectical Behaviour Therapy (DBT)
Schema Therapy
Mentalisation-Based Therapy (MBT)
Cognitive Behavioural Therapy (CBT)
Psychodynamic Psychotherapy
Trauma-focused interventions

Support Educational and Occupational Functioning

Understanding personality functioning may help explain:

workplace conflict
difficulty maintaining employment
academic struggles
challenges in team settings
interpersonal misunderstandings

Comparative Analysis of Personality Assessment Instruments

Instrument	Primary Purpose	Typical Use	Clinical Utility
MMPI-2	Broad personality and psychopathology assessment	Adults	Assesses emotional functioning, personality patterns, psychopathology, validity indicators and response consistency
MMPI-3	Updated personality assessment instrument	Adults	Provides contemporary dimensional assessment with improved psychometric properties
PID-5	DSM-5 maladaptive trait assessment	Adolescents and adults	Measures Negative Affectivity, Detachment, Antagonism, Disinhibition and Psychoticism
MCMI	Personality disorder assessment	Adults	Assesses personality pathology and clinical syndromes
BSL-23	Borderline symptom severity measure	Borderline presentations	Evaluates affective instability, impulsivity and interpersonal difficulties
YSQ	Early maladaptive schema assessment	Adults and adolescents	Identifies entrenched cognitive-emotional schemas associated with personality dysfunction
Clinical Interview	Diagnostic integration	All referrals	Essential for contextualising psychometric findings

Why Personality Disorder Assessment Matters

Personality difficulties often influence nearly every aspect of life including relationships, work, academic performance, emotional wellbeing, and decision-making.

Without a comprehensive assessment, individuals may receive inaccurate diagnoses or interventions that do not adequately address the underlying personality structure contributing to their difficulties.

A structured psychological assessment allows clinicians to better understand:

personality functioning
severity of impairment
maladaptive traits
emotional vulnerabilities
interpersonal patterns
protective factors
treatment priorities

This ultimately supports more targeted and effective interventions.

Scientific Basis for Test Selection

The assessment approach is informed by both DSM-5-TR and ICD-11 frameworks.

The DSM-5 Alternative Model for Personality Disorders recommends dimensional assessment of maladaptive traits, which is operationalised through the PID-5.

ICD-11 similarly conceptualises personality disorders in terms of:

severity
self-functioning
interpersonal functioning
maladaptive trait domains

Broad-spectrum personality measures such as the MMPI-2, MMPI-3, and MCMI are valuable because they assess personality pathology while simultaneously evaluating co-occurring psychopathology and response validity.

Measures such as the BSL-23 provide more targeted assessment of borderline symptom severity, while the Young Schema Questionnaire helps identify enduring maladaptive cognitive and emotional patterns associated with personality dysfunction.

References

American Psychiatric Association. (2022). Diagnostic and Statistical Manual of Mental Disorders (5th ed., text rev.; DSM-5-TR). American Psychiatric Publishing.

Bach, B., & First, M. B. (2018). Application of the ICD-11 classification of personality disorders. BMC Psychiatry, 18(1), 351.

Butcher, J. N., Ben-Porath, Y. S., & Tellegen, A. (2017). MMPI-2 Manual for Administration, Scoring, and Interpretation. University of Minnesota Press.

Ben-Porath, Y. S., & Tellegen, A. (2020). MMPI-3 Manual for Administration, Scoring, and Interpretation. University of Minnesota Press.

Krueger, R. F., Derringer, J., Markon, K. E., Watson, D., & Skodol, A. E. (2012). Initial construction of a maladaptive personality trait model and inventory for DSM-5. Psychological Medicine, 42(9), 1879–1890.

Millon, T., Grossman, S., & Millon, C. (2015). Millon Clinical Multiaxial Inventory–IV Manual. Pearson.

Bohus, M., Kleindienst, N., Limberger, M. F., et al. (2009). The short version of the Borderline Symptom List (BSL-23): Development and psychometric evaluation. Psychopathology, 42(1), 32–39.

Young, J. E., Klosko, J. S., & Weishaar, M. E. (2003). Schema Therapy: A Practitioner’s Guide. Guilford Press