What type of data collection method counts behavior only if it is present within the entire interval?

Whole interval recording is a data collection method used in behavioral observation, particularly within the field of communication disorders and applied behavior analysis. In this method, the observer records whether a particular behavior occurs throughout the entire duration of a predetermined interval of time. For the behavior to be counted, it must be present for the whole length of that interval.

This method is particularly useful for capturing instances of continuous and sustained behaviors, as it emphasizes the duration of the behavior rather than just its occurrence. It can be beneficial for behaviors that are more likely to be maintained over longer periods, such as engagement in an activity or sustained attention. Since a behavior must be observed for the entire interval to be counted, this method can provide insights into the consistency or persistence of behaviors over time.

In contrast, other methods like partial interval recording allow for behaviors to be counted as long as they occur at least once during the interval, which may not effectively capture the duration of the behavior. Average interval recording and time sampling recording have their distinct purposes and measurement criteria, focusing either on averages over time or on snapshots of behavior at specific moments, rather than requiring a full interval occurrence for recording.