What type of interval recording is abbreviated as 'W'?

The term abbreviated as 'W' corresponds to whole interval recording, which is a specific type of interval recording method used in behavior analysis. In whole interval recording, the observer records whether the target behavior occurs throughout the entire interval. This method is particularly useful for measuring behaviors that are continuous in nature, as it requires the behavior to be present for the entire duration of the observation period to be considered a success.

Whole interval recording is effective for encouraging behaviors rather than merely tracking their occurrence, since the requirement for the behavior to persist throughout the entire interval can highlight instances of engagement or sustained action. This method can often underestimate the frequency of discrete behaviors because it only counts the behavior if it happens for the entire interval, which differentiates it from partial interval recording, where the behavior is recorded if it occurs at any time during the interval.

The other options provided, such as whole behavior assessment, weighted behavior recording, and whole observation detail, do not accurately describe the specific methodology associated with observational data collection in the context of ABA therapy, which is why whole interval recording is the correct answer.