ADHDAnxiety DisordersBipolar DisorderDepressionDissociative DisordersEpilepsyInsomniaNeurologyPediatricsPersonality DisordersQSchizophreniaSleepdisordersSubstance Abuse Disorders QUASI-EXPERIMENTAL DESIGN By N., Sam M.S. An experiment in which participants are assigned to either control groups or experimental groups in a non-random manner. Cite this page: N., Sam M.S., "QUASI-EXPERIMENTAL DESIGN," in PsychologyDictionary.org, April 28, 2013, https://psychologydictionary.org/quasi-experimental-design/ (accessed May 1, 2026). Share this Article Facebook Twitter Email Copy Link Print By N., Sam M.S. Sam holds a masters in Child Psychology and is an avid supporter of Psychology academics. Leave a comment Leave a comment Leave a ReplyYour email address will not be published. Required fields are marked *Comment * Name Email Website Δ Search for: Latest Posts What Happens At An ADHD Assessment A Quick Look at the History Behind Hypnosis A Brief History of Brainwashing: The Science of Thought Control A Deep Dive into the Social Psychology of Leadership Counseling Approaches to Client Care: Theories to Apply in Practice The Future Of Education: Can You Earn A Psychology Degree Online? Insomnia & Mental Illness: What is the Correlation? Stop Guessing: Here Are 3 Steps to Data-Driven Psychological Decisions Getting Help with Grief: Understanding Therapy & How It Can Help Exploring the Psychology of Risk and Reward Understanding ADHD in Women: Symptoms, Treatment & Support Meeting the Milestones: A Guide to Piaget's Child Developmental Stages Popular Psychology Terms JUDGMENT MEDICAL MODEL HYPERMNESIA AFFIRMATION BRAINWASHING BACKUP REINFORCER QUALITY WELL-BEING MESSAGE-LEARNING APPROACH AFFILIATIVE BEHAVIOR NARCOLEPSY BEHAVIORAL CONGRUENCE TELEOPSIA BEHAVIORAL CONSISTENCY