In episode 4, I cover task list item A-09, which is all about evaluating the accuracy and reliability of measurement procedures. I also talk about validity of measurement procedures. In this episode, I reference information from: Cooper, J. 0., Heron, T. E., & Heward, W. L. (2020). Applied behavior analysis (3rd ed.). Upper Saddle River, NJ: Prentice Hall. If you're looking for additional information,  you can find it on pages 102-108. E-mail me at abastudypodcast@gmail.com, follow on Instagram @abastudypodcast!