EPPP Exam Complete Guide: 225-Question Format, Content Domains, Scoring, and State Requirements

The EPPP is developed and maintained by the Association of State and Provincial Psychology Boards (ASPPB) and serves as the primary knowledge-based examination for psychology licensure across North America. Whether you are pursuing licensure as a clinical psychologist, counseling psychologist, school psychologist, or neuropsychologist, the EPPP is the exam you must pass. With 225 questions covering eight broad content domains, the exam tests the foundational scientific and professional knowledge that all practicing psychologists are expected to possess.

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What Is the EPPP and Who Takes It?

The EPPP exam is the standardized test that psychology licensing boards across the United States and Canada use to evaluate whether doctoral-level psychologists possess the knowledge necessary for independent practice. The exam was developed by ASPPB in collaboration with the Professional Examination Service and has been the standard psychology licensing examination for over 60 years.

Who Must Take the EPPP?

The EPPP is required for virtually all psychologists seeking licensure in the U.S. and Canada. This includes:

• Clinical psychologists: The largest group of EPPP candidates. Clinical psychologists assess, diagnose, and treat mental health disorders and work in settings ranging from private practice to hospitals and community mental health centers.
• Counseling psychologists: Focus on helping people with life transitions, stress, and adjustment issues. The EPPP is required for licensure even though the practice focus differs from clinical psychology.
• School psychologists: Some states require the EPPP for school psychologists, particularly those seeking the full psychologist license rather than a school psychology credential.
• Neuropsychologists: Specialize in brain-behavior relationships. Must pass the EPPP for general psychology licensure before pursuing additional neuropsychology credentials.
• Industrial-organizational psychologists: In states that require licensure for I-O psychologists, the EPPP is the required examination.

Prerequisites

To sit for the EPPP, candidates must typically hold a doctoral degree in psychology (PhD or PsyD) from an APA-accredited or regionally accredited program. Most states also require completion of a predoctoral internship and a specified number of postdoctoral supervised hours (usually 1,500-2,000 hours) before granting eligibility to take the exam. Some states allow candidates to take the EPPP before completing all supervised hours, using the exam as one component of the licensing application.

The specific requirements vary by state — always verify with your state psychology board before beginning the application process. The ASPPB maintains a state-by-state directory of psychology boards at asppb.org.

Exam Format and the Eight Content Domains

The EPPP exam consists of 225 multiple-choice questions administered over 4 hours and 15 minutes at Prometric test centers. Each question has four answer options with one correct answer. The exam covers eight content domains that represent the core knowledge base of professional psychology.

The Eight Content Domains

What Each Domain Covers in Detail

Biological Bases of Behavior (12%) — This domain covers the physiological underpinnings of behavior and mental processes. Key topics include the structure and function of the central and peripheral nervous systems, neurotransmitter systems (especially those relevant to psychopathology and psychopharmacology), the biological bases of sensation, perception, and movement, behavioral genetics and epigenetics, and the mechanisms of action of major psychotropic medication classes. Candidates should understand how biological factors interact with psychological and social factors in both normal functioning and psychopathology.

Cognitive-Affective Bases of Behavior (13%) — This domain examines the psychological processes that underlie thinking, feeling, and behaving. Topics include classical and operant conditioning, cognitive theories of learning and memory, attentional processes, problem-solving and decision-making, theories of emotion and motivation, language development and processing, and the relationship between cognition and affect. Understanding how these processes interact and how they are disrupted in various psychological disorders is essential.

Social and Cultural Bases of Behavior (12%) — This domain covers social psychological processes and cultural factors that influence behavior. Key areas include social cognition (attitudes, attributions, stereotyping), group dynamics and intergroup relations, conformity and obedience, prosocial behavior and aggression, cultural competence in psychological practice, the impact of systemic racism and discrimination on mental health, and multicultural assessment and intervention considerations.

Growth and Lifespan Development (12%) — This domain addresses human development from prenatal stages through late adulthood and end of life. Topics include major developmental theories (Piaget, Erikson, Vygotsky, Kohlberg), attachment theory, cognitive and socioemotional development, identity formation, aging and geropsychology, developmental psychopathology, and the impact of early experiences on later functioning.

Strengthen your grasp of developmental psychology with our Growth and Lifespan Development practice quiz, which targets the theoretical frameworks and application questions that appear on this section of the exam.

Assessment and Diagnosis (14%) — One of the two most heavily weighted domains. Covers psychometric theory (reliability, validity, norms), major psychological assessment instruments (MMPI-2, WAIS, Rorschach, MCMI, Beck inventories), clinical interviewing, behavioral observation, differential diagnosis using the DSM-5, intellectual disability assessment, personality assessment, and neuropsychological screening. Understanding test construction principles and how to interpret test results in context is critical.

Practice your diagnostic reasoning with our Assessment and Diagnosis practice quiz to sharpen your skills in the exam's most heavily weighted clinical domain.

Treatment, Intervention, Prevention, and Supervision (14%) — The other most heavily weighted domain. Covers the major psychotherapy orientations (psychodynamic, cognitive-behavioral, humanistic, systems, integrative), evidence-based treatment matching, crisis intervention, group and family therapy, prevention science and public health approaches, consultation models, and clinical supervision theories and practices. Candidates should know which treatments have the strongest evidence base for specific disorders.

Research Methods and Statistics (8%) — The smallest domain by weight but still important. Covers research design (experimental, quasi-experimental, correlational, qualitative), statistical concepts (hypothesis testing, ANOVA, regression, effect sizes, power analysis), program evaluation, meta-analysis, and the principles of evidence-based practice. While the weight is relatively low, statistics questions are where many candidates lose points because the material feels less relevant to clinical practice.

Ethical, Legal, and Professional Issues (15%) — The most heavily weighted single domain. Covers the APA Ethical Principles of Psychologists and Code of Conduct, state and federal laws governing psychological practice (HIPAA, duty to warn/protect, mandated reporting), informed consent, record-keeping requirements, multiple relationships and boundary issues, competence and scope of practice, and professional liability. This domain integrates with all other domains because ethical considerations permeate every area of psychological practice.

Scoring System and Pass Rates

Understanding how the EPPP exam is scored helps you set appropriate study goals and interpret your results accurately.

How Scoring Works

The EPPP uses a scaled scoring system. Your raw score (number of correct answers) is converted to a scaled score ranging from 200 to 800. Most states set the passing scaled score at 500, which corresponds to answering approximately 65-70% of questions correctly. However, the exact number of correct answers needed varies slightly between exam forms due to statistical equating procedures that account for differences in difficulty.

It is important to note that not all states use the 500 passing score. Several states and provinces set higher passing thresholds:

Always verify the passing score with your state psychology board before starting preparation. Targeting a score above the minimum gives you a comfortable margin.

Score Reports

After completing the exam, you receive an unofficial pass/fail result at the Prometric test center. Official score reports are sent to your state board and typically available within 2-4 weeks. If you do not pass, the report includes your overall scaled score and your performance in each of the eight content domains, expressed as a percentage. This domain-level breakdown is invaluable for targeting your study before a retake.

Pass Rates

ASPPB publishes aggregate pass rate data. Recent statistics show:

• Overall first-time pass rate: Approximately 82-85% for candidates from APA-accredited doctoral programs
• Overall pass rate (all attempts): Approximately 75-78% when including retakes
• PhD program graduates: Tend to have slightly higher pass rates than PsyD graduates, likely reflecting differences in research training emphasis
• APA-accredited programs vs. non-accredited: Graduates of APA-accredited programs pass at significantly higher rates than those from non-accredited programs

These rates mean the EPPP is a challenging but passable exam for well-prepared candidates. The 15-18% first-time failure rate underscores the importance of thorough preparation rather than relying on graduate school knowledge alone.

Retake Policy

If you do not pass, most states allow you to retake the EPPP after a waiting period (typically 60-90 days). You must pay the exam fee again for each attempt. Some states impose a limit on the total number of attempts or require additional coursework or supervision after multiple failed attempts. ASPPB limits candidates to four attempts per 12-month period. Use the content domain breakdown from your score report to focus your retake preparation on your weakest areas.

State Requirements and Registration

The EPPP exam is administered through a coordination between your state psychology board, ASPPB, and Prometric test centers. The registration process involves several steps and can take weeks to months, so plan ahead.

Step-by-Step Registration Process

1. Apply to your state psychology board: Submit your application for licensure to your state board. This typically requires documentation of your doctoral degree (official transcripts), predoctoral internship completion, postdoctoral supervised hours (if required by your state), and any other state-specific requirements. Many states also require a jurisprudence exam covering state-specific laws and regulations.
2. Receive approval to sit for the EPPP: Once your state board reviews and approves your application, they notify ASPPB that you are eligible to take the exam. Processing times range from 2-12 weeks depending on the state.
3. Register with ASPPB and pay: Create an account on the ASPPB website, pay the exam fee ($687.50 as of 2026), and confirm your eligibility. ASPPB then sends your authorization to Prometric.
4. Schedule at Prometric: Once authorized, schedule your exam at a Prometric test center through their website or by phone. Test centers are available throughout the U.S. and Canada. Popular dates fill up quickly, so schedule at least 4-6 weeks in advance.

EPPP-2: The Skills-Based Supplement

ASPPB has developed the EPPP-2 (also called EPPP Part 2 — Skills), a skills-based assessment designed to complement the knowledge-based EPPP. The EPPP-2 tests applied competencies through scenario-based questions that evaluate clinical judgment, professional decision-making, and practical application of knowledge. As of 2026, only a handful of jurisdictions have adopted the EPPP-2 as a licensing requirement. Check with your state board to determine whether you need to pass both the traditional EPPP (Part 1 — Knowledge) and the EPPP-2 (Part 2 — Skills).

Interstate Licensure and the PSYPACT

The Psychology Interjurisdictional Compact (PSYPACT) allows licensed psychologists to practice telepsychology and conduct temporary in-person practice across state lines without obtaining a separate license in each state. To participate in PSYPACT, you must hold a current license in a PSYPACT member state and meet specific credential requirements. The EPPP is one of the foundational requirements — you must have passed the EPPP with a scaled score of 500 or higher to qualify for PSYPACT authority to practice. This makes the EPPP not just a single-state requirement but a gateway to multi-state practice mobility.

What to Bring on Exam Day

• Two forms of valid identification: Primary ID must include your name, photo, and signature (passport or driver's license). Secondary ID must include your name and signature.
• Prometric confirmation: Your appointment confirmation number or printout.
• Nothing else enters the testing room: No phones, watches, notes, food, or drinks. Prometric provides lockers and scratch materials.

Prepare for the exam's most heavily tested domains with our Assessment and Diagnosis and Growth and Lifespan Development practice quizzes to build confidence before exam day.