The video provides an overview of discontinuous measurement techniques used in ABA.
- Partial interval recording: Observing whether a behaviour occurs at any point during an interval.
- Advantages- useful for behaviour that happens frequently and does not have clear beginning or ending.
- Disadvantages- Can overestimate the presence of behaviour since any occurrence within the internal counts.
- Example: Tracking if a student raises their hand at any time during a 5- minute interval.
- Whole interval recording: recording is the behaviour occurs throughout the entire interval
- Advantages- provides a good measure for behaviours that last for some time.
- Disadvantage- may underestimate behaviour if it doesn’t persist through the whole interval.
- Example- Monitoring if a student stays engaged with a task for the entire duration of 10- minute period.
- Momentary Time Sampling: Checking for the behaviour at specific moments (end of an interval).
- Advantages: Easy to implement, especially in busy settings.
- Disadvantages: Might miss behaviors occurring outside the exact moment of observation.
- Example: Observing if a student is on-task at the exact moment the timer goes off every 5 minutes.
- Planned Activity Check (PLACHECK): Variation of momentary time sampling used to observe groups.
- Advantages: Efficient for assessing the engagement levels of multiple individuals simultaneously.
- Disadvantages: May not capture individual variations as effectively.
- Example: Counting how many students in a classroom are participating in an activity at a given moment.
The video likely explains how to decide which method to use based on the behaviour being studied, the context, and the goals of the intervention.
