Point interval: Add intervals that get “yes” or filled intervals. to consult. However, we will refer to other literatures if justified. For more information on the practical aspects of IOA data collection (e.g. B the frequency of data collection, how to interpret and use this data, acceptable IOA values), it is recommended that the reader consult Vollmer et al. (2008), also published in Behavior Analysis in Practice. Three broad categories of reliability metrics will be addressed in the remaining part of this article: a) event-based, (b) interval-based, and (c) time-based. . . .