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The distinctions and definitions that recur on the EPPP. Skim before test day, then prove it with
practice questions.
Exam facts
- Part 1 (Knowledge): 225 items (175 scored), 4 h 15 m; scaled 200–800, pass = 500
- Biggest domains: Ethics 16% and Assessment 16%
Learning & behavior
- Negative reinforcement — remove an aversive stimulus to increase a
behavior (not punishment) - Classical vs. operant — classical pairs stimuli (Pavlov); operant uses
consequences (Skinner) - Variable-ratio schedule — most resistant to extinction
Statistics
- Type I error — reject a true null (false positive, alpha)
- Type II error — fail to reject a false null (false negative, beta)
- Reliability = consistency; validity = measures what it should
Development & ethics
- Erikson adolescence — identity vs. role confusion
- Duty to protect (Tarasoff) — a serious, imminent threat to an identifiable victim
can override confidentiality - Informed consent & competence — cornerstones of the ethics domain
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Frequently asked questions
What is negative reinforcement?
Removing an aversive stimulus in order to increase a behavior. It is not punishment — reinforcement always increases behavior, and ‘negative’ means something is taken away.
What is the difference between a Type I and Type II error?
A Type I error rejects a true null hypothesis (a false positive, alpha); a Type II error fails to reject a false null hypothesis (a false negative, beta).
What is the Tarasoff duty?
The duty to protect: when a client poses a serious, imminent threat to an identifiable victim, the psychologist may take reasonable protective steps — including warning the victim or notifying authorities — even though that overrides confidentiality.
Sources & references
The exam facts on this page are drawn from official certifying-body materials, reviewed 2026-06-18 by the DrCertifications exam-prep team (10+ years in exam preparation and publishing).