The Examination for Professional Practice in Psychology (EPPP) is the standardized licensing exam required for psychologists in the United States and Canada. This guide covers the 225-question exam format, all eight content domains, how scoring works, what individual states require, and how to navigate the registration process from application to exam day.
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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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:
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.
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
| Domain | Approximate Weight | Description |
|---|---|---|
| Biological Bases of Behavior | 12% | Neuroanatomy, neurochemistry, psychopharmacology, genetics, physiological psychology |
| Cognitive-Affective Bases of Behavior | 13% | Learning, memory, perception, emotion, motivation, cognition |
| Social and Cultural Bases of Behavior | 12% | Social psychology, cultural diversity, group dynamics, interpersonal processes |
| Growth and Lifespan Development | 12% | Developmental theories, aging, childhood through geriatric development |
| Assessment and Diagnosis | 14% | Psychometrics, test construction, clinical assessment, DSM-5 diagnosis |
| Treatment, Intervention, Prevention, and Supervision | 14% | Psychotherapy approaches, evidence-based treatments, supervision models |
| Research Methods and Statistics | 8% | Research design, statistical analysis, program evaluation, evidence-based practice |
| Ethical, Legal, and Professional Issues | 15% | APA Ethics Code, legal standards, professional conduct, confidentiality |
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.
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:
| Passing Score | Jurisdictions |
|---|---|
| 500 (standard) | Majority of U.S. states and Canadian provinces |
| 520-550 | A small number of states requiring above-standard scores |
| Varies | Check with your specific state board — requirements can change |
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:
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.
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
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
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.
The EPPP contains 225 scored multiple-choice questions. You have 4 hours and 15 minutes to complete the exam, giving you approximately 1.1 minutes per question. The exam may also include additional pretest items that ASPPB is evaluating for future use, but these do not count toward your score. Each question has four answer options with one correct answer. Questions are drawn from eight content domains covering the breadth of psychological science and professional practice.
Most states set the passing scaled score at 500 on a scale of 200 to 800. This corresponds to answering approximately 65-70% of questions correctly, though the exact number varies between exam forms due to statistical equating. A small number of states require higher passing scores (520-550). Always verify the passing score with your specific state psychology board before beginning your preparation, as requirements can change. Targeting a score above the minimum provides a comfortable safety margin.
The EPPP is considered a challenging professional licensing examination. First-time pass rates for graduates of APA-accredited programs run approximately 82-85%, meaning 15-18% of well-prepared candidates from accredited programs do not pass on their first attempt. The difficulty comes from the breadth of content — eight domains spanning biological psychology, development, assessment, treatment, research methods, and ethics — and from the application-based question format that tests your ability to apply knowledge to clinical scenarios rather than simply recall facts. Thorough preparation over 3-6 months is recommended.
The eight content domains are: (1) Biological Bases of Behavior (12%), (2) Cognitive-Affective Bases of Behavior (13%), (3) Social and Cultural Bases of Behavior (12%), (4) Growth and Lifespan Development (12%), (5) Assessment and Diagnosis (14%), (6) Treatment, Intervention, Prevention, and Supervision (14%), (7) Research Methods and Statistics (8%), and (8) Ethical, Legal, and Professional Issues (15%). The percentages indicate the approximate weight each domain carries on the exam. Ethics, Assessment, and Treatment are the three most heavily weighted domains.
The EPPP exam fee is $687.50, set by ASPPB. This covers the exam administration at Prometric test centers. Your state psychology board may charge additional application and processing fees, which vary widely by state. Total licensure costs including state fees, background checks, and the exam typically range from $800 to $1,500. If you need to retake the exam, you pay the $687.50 ASPPB fee again for each attempt. Some states also require a separate jurisprudence exam with its own fee.
This depends entirely on your state. Some states allow candidates to take the EPPP after completing their doctoral degree and predoctoral internship but before finishing all required postdoctoral supervised hours. Other states require all supervised hours to be completed before granting eligibility. Taking the exam earlier can be advantageous because the material is fresher from your doctoral training. Check with your specific state psychology board for their eligibility timeline — this is one of the most commonly varying requirements across states.