Understanding Discontinuous Measurement in ABA: A Guide for Parents and Practitioners

In Applied Behavior Analysis (ABA), accurate data collection is essential to track progress and adjust interventions. One key concept is discontinuous measurement, which plays an important role in behavior tracking. But what is discontinuous measurement in ABA, and how does it differ from other methods? In this post, we’ll break it down in simple terms and explore types of discontinuous measurement (ABA) with clear examples.

What Is Discontinuous Measurement in ABA?

Discontinuous measurement in ABA refers to data collection methods that do not capture every instance of a behavior. Instead, behaviors are observed and recorded during specific intervals or under certain conditions. In other words, we get a sample of the behavior, rather than continuous tracking.

So, what is discontinuous measurement ABA in practical terms? It’s a strategy used when it’s not feasible to observe a behavior 100% of the time—either because of limited time, staff, or the nature of the behavior itself.

Discontinuous Measurement ABA Definition

Here’s a straightforward discontinuous measurement ABA definition:

A data collection method that captures behavior at selected points in time, rather than continuously, often through interval-based observation techniques.

This is different from continuous measurement, where every instance of the behavior is recorded as it occurs.

Continuous vs Discontinuous Measurement ABA

Understanding the difference between continuous and discontinuous measurement ABA is key for effective behavior tracking.

• Continuous measurement records every occurrence of a behavior (e.g., frequency, duration).

• Discontinuous measurement, on the other hand, only records behavior during designated observation windows.

In continuous vs discontinuous measurement ABA, the choice depends on the type of behavior, available resources, and specific goals of the intervention.

Types of Discontinuous Measurement ABA

There are three primary types of discontinuous measurement in ABA:

1. Partial Interval Recording

   • The behavior is recorded if it occurs at any time during the interval.

   • Example: A student is recorded as "on-task" if they are paying attention at any point during a 10-second interval.

2. Whole Interval Recording

   • The behavior must occur for the entire duration of the interval to be recorded.

   • Example: A child is recorded as “sitting appropriately” only if they sit for the entire 30-second interval.

3. Momentary Time Sampling

   • The behavior is recorded if it occurs at the exact moment the interval ends.

   • Example: At the end of each 1-minute interval, you check if a student is engaged with a task.

These types of discontinuous measurement ABA help provide useful data in classroom or clinical settings where full-time observation isn’t realistic.

Discontinuous Measurement ABA Examples

Here are some discontinuous measurement ABA examples to put it all into perspective:

• In a classroom, a teacher uses partial interval recording to track instances of calling out.

• A therapist uses momentary time sampling to monitor whether a child remains seated during group time.

• A behavior analyst applies whole interval recording to track sustained attention during a learning task.

Each of these ABA discontinuous measurement methods gives insight into behavior trends without requiring constant observation.

When to Use Discontinuous Measurement

Discontinuous measurement in ABA is ideal when:

• Behaviors are too frequent to record every instance.

• Staff need to monitor multiple students or clients.

• Sampling still provides enough data to inform decisions.

By balancing practicality and accuracy, discontinuous measurement (ABA) supports effective intervention planning in real-world settings.

Final Thoughts

Whether you’re a parent, teacher, or therapist, understanding discontinuous measurement ABA helps you appreciate the value of smart, strategic observation. Knowing when and how to use continuous and discontinuous measurement ABA can improve treatment outcomes and ensure you're collecting data that truly reflects behavioral progress.