CTT vs. IRT: What is the Difference?

QuantFish instructor and statistical consultant Dr. Christian Geiser explains the key difference between classical test theory (CTT) and item response theory (IRT). #Mplus #statistics #CTT #IRT #geiser #statisticstutorials #quantfish #mplusforbeginners #psychometrics #psychometry #assessment FREE weekly stats tips: https://mailchi.mp/goquantfish.com/ne... FREE statistics workshops: https://www.goquantfish.com/collectio... Dr. Geiser's weekly stats newsletter: https://christiangeiser.com/newsletter Consulting inquiries: https://christiangeiser.com/consulting/ Get Dr. Geiser's FREE MPLUS FOR BEGINNERS COURSE: https://www.goquantfish.com/courses/m... PSYCHOMETRICS FOR BEGINNERS COURSE: https://www.goquantfish.com/courses/p... CLASSICAL TEST THEORY COURSE: https://www.goquantfish.com/courses/c... IRT WITH MPLUS & STATA COURSE: https://www.goquantfish.com/courses/i... RASCH MODELING WITH R & WINSTEPS COURSE: https://www.goquantfish.com/courses/r... Dr. Geiser's BOOKS: ****Longitudinal Structural Equation Modeling with Mplus: https://amzn.to/3ekOLOW ****Data Analysis with Mplus: https://amzn.to/3eg9vY4 ON-DEMAND MPLUS COURSES: ****SEM with Mplus: https://www.goquantfish.com/courses/S... ****Multilevel Modeling with Mplus: https://www.goquantfish.com/courses/m... ****Latent Class Analysis with Mplus: https://www.goquantfish.com/courses/l... ABOUT THIS INSTRUCTOR: Dr. Christian Geiser is a quantitative psychologist, author of two books on Mplus, and a leader in the development of latent variable techniques for complex data. With his accessible books and sought-after workshops, he has helped thousands of researchers and students around the world to achieve their analytic goals. Visit his website at christiangeiser.com. ABOUT QUANTFISH: We bring top-level stats training from the world's leading methodologists to researchers and students all over the world. Learn more at https://goquantfish.com. Some affiliate links may be included at no additional cost to purchasers.