Flashcards Directions: "Please add definition for each term written below. Resources: www.flashcardmachine.com, www.quizlet.com" Chapter 5 Chapter 6 accuracy systematic manipulation believability functional relation calibration internal validity exact count-per-interval IOA maturation interobserver agreement (IOA) instrumentation interval-by-interval IOA testing mean count-per-interval IOA diffusion of treatment mean duration-per-occurrence IOA single case design measurement bias ABA design naive observer multiple baseline observer drift alternating treatment design reliability changing criterion design scored-interval IOA parametric analysis total count IOA component analysis total duration IOA trial-by-trial IOA true value unscored-interval IOA validity