Motivating Operations in ABA: Definition, Types, Examples, and Practical Applications

Motivating operations (MOs) are environmental events or conditions that temporarily change the value of a reinforcer or punisher and influence the likelihood of behaviors that have previously produced that consequence. In applied behavior analysis (ABA), understanding motivating operations helps clinicians identify why behaviors occur and develop more effective intervention strategies.

What are motivating operations in ABA, and why do they matter?

Motivating operations (MOs) are temporary environmental conditions or internal states that change the value of a consequence and influence how likely a person is to engage in behavior that has produced that consequence in the past.

In applied behavior analysis (ABA), motivating operations help explain why a behavior may occur in one context but not in another. When behavior analysts identify the motivating operation affecting behavior, they can better understand its function and choose interventions that are more likely to address the relevant variables.

Motivating operations may either increase or decrease the effectiveness of a consequence. Thirst provides a simple example. When a person is thirsty, water becomes more valuable, and behaviors that have previously resulted in access to a drink are more likely to occur. After the person has had enough to drink, water becomes less valuable, and those same behaviors are less likely.

Establishing and abolishing operations

Motivating operations can be categorized according to whether they increase or decrease the effectiveness of a consequence. The two categories are:

• Establishing operations
• Abolishing operations

Establishing operations (EOs)

An establishing operation is an event or condition that increases the effectiveness of a consequence and makes behavior that has previously produced that consequence more likely.

Deprivation is a common example of an establishing operation. When a person has had limited or no recent access to an item or activity, that item or activity may become more valuable. As its value increases, it is more likely to function as a reinforcer, and behaviors that have resulted in access to it may occur more often.

Examples of establishing operations

• Going several hours without eating may increase the reinforcing value of food.
• Exercising in hot weather may increase the value of water.
• Limited social interaction may increase the reinforcing value of attention.
• Spending time in a low-stimulation setting, such as a waiting room, may increase the value of toys, music, or other activities.
• Feeling cold may increase the value of a blanket or warm clothing.

Abolishing operations (AOs)

An abolishing operation is an event or condition that decreases the effectiveness of a consequence and makes behavior that has previously produced that consequence less likely. Abolishing operations may result from internal states or environmental conditions.

Satiation is a common example of an abolishing operation. When a person has had frequent or prolonged access to an item or activity, its value may decrease. As a result, the person may be less motivated to engage in behaviors that previously resulted in access to it.

Examples of abolishing operations

• A snack may be less reinforcing immediately after a person eats lunch.
• A knitted hat may be less valuable during warm summer weather.
• A homework pass may be less reinforcing after the assignment has already been completed.
• Being released from detention may be less reinforcing if the person must remain after school for another reason.
• After spending several hours at a crowded, noisy event, social interaction may become less rewarding.

Unconditioned vs. conditioned motivating operations

Motivating operations can also be classified as either unconditioned motivating operations (UMOs) or conditioned motivating operations (CMOs). The difference lies in whether the motivating effect is innate or learned. Understanding both types helps behavior analysts identify why a reinforcer becomes more or less valuable in a particular situation and select interventions that address the underlying variables influencing behavior.

Unconditioned motivating operations (UMOs)

Unconditioned motivating operations are biologically based and do not require prior learning. They naturally alter the value of a reinforcer or punisher because of changes in a person’s physical condition or environment. Common examples include hunger, thirst, sleep deprivation, pain, and extreme temperatures.

For example, a child who has not eaten for several hours is likely to find food much more reinforcing than they would immediately after a meal. Likewise, someone who has been exercising in hot weather is more motivated to obtain water than someone who is already well hydrated. These naturally occurring states temporarily increase or decrease the effectiveness of specific consequences and influence the likelihood of behaviors that have previously produced those outcomes.

Examples of unconditioned motivating operations

• Hunger increases the reinforcing value of food.
• Thirst increases the reinforcing value of water.
• Sleep deprivation increases the value of rest.
• Cold temperatures increase the value of warm clothing or shelter.
• Pain may increase the value of escaping or avoiding activities that worsen discomfort.

Conditioned motivating operations (CMOs)

Conditioned motivating operations develop through learning and experience rather than biology. A previously neutral event becomes motivating because it has been associated with other reinforcers or punishers. Unlike UMOs, CMOs are shaped by an individual’s history and may differ from person to person.

Behavior analysts commonly describe three types of conditioned motivating operations:

• Surrogate CMO (CMO-S): A stimulus that acquires motivating properties because it has repeatedly been paired with another motivating operation.
• Reflexive CMO (CMO-R): A stimulus that signals worsening or improving conditions, making behaviors that avoid or escape the situation more or less valuable.
• Transitive CMO (CMO-T): A stimulus that temporarily increases the value of another item or event needed to complete a task or gain access to reinforcement.

Why the distinction matters

Distinguishing between unconditioned and conditioned motivating operations helps behavior analysts determine whether motivation is driven by biological needs or learning history. This information can improve functional behavior assessments, guide intervention planning, and help clinicians identify strategies that reduce problem behavior while increasing appropriate replacement behaviors. Considering both UMOs and CMOs provides a more complete understanding of why behavior changes across different environments and situations.

Frequently Asked Questions about motivating operations in ABA

1. What are motivating operations in ABA?

Motivating operations (MOs) are environmental events or internal conditions that temporarily change how valuable a reinforcer or punisher is and influence whether a behavior is more or less likely to occur. In applied behavior analysis (ABA), motivating operations help explain why behavior changes across different situations. For example, a person who has not eaten for several hours is more likely to engage in behaviors that have previously resulted in food because food has become more valuable as a reinforcer.

2. What is the difference between an establishing operation and an abolishing operation?

An establishing operation (EO) increases the value of a reinforcer or punisher and makes behaviors that produce that consequence more likely. For example, thirst increases the effectiveness of water as a reinforcer and may increase requests for a drink.

An abolishing operation (AO) decreases the value of a reinforcer or punisher and reduces the likelihood of behaviors associated with that consequence. Drinking several glasses of water, for instance, reduces the reinforcing value of additional water and makes requesting more water less likely.

3. Why are motivating operations important in behavior analysis?

Motivating operations help behavior analysts understand why a behavior occurs at a particular moment. By identifying the conditions that increase or decrease motivation, clinicians can conduct more accurate functional behavior assessments, predict behavior more effectively, and design interventions that address the underlying variables influencing behavior. Considering motivating operations often improves treatment outcomes because interventions target both antecedents and consequences.

4. What is the difference between motivating operations and discriminative stimuli?

Although both influence behavior, they serve different functions. A motivating operation changes how valuable a consequence is, while a discriminative stimulus (SD) signals that reinforcement is available for a particular behavior. For example, being hungry (an establishing operation) makes food more valuable, while seeing a vending machine that accepts your payment (an SD) signals that buying a snack will be reinforced with food. Effective ABA interventions often consider both motivating operations and discriminative stimuli together.

5. Can motivating operations be used to reduce challenging behavior?

Yes. Understanding motivating operations allows clinicians to proactively reduce the likelihood of challenging behaviors by modifying environmental conditions before the behavior occurs. For example, providing regular access to preferred items, teaching functional communication skills before motivation becomes intense, or scheduling breaks before tasks become overly demanding can decrease the motivation for problem behavior. Identifying and addressing motivating operations is a key component of positive, function-based behavior support.