ABA Core Principles – RBT Exam Study Guide
Overview
Applied Behavior Analysis (ABA) is a science-based approach to understanding and changing behavior by applying principles derived from learning theory. This study guide covers the foundational concepts tested on the RBT exam, including the seven dimensions of ABA, reinforcement, punishment, stimulus control, and the functions of behavior. Mastery of these principles is essential for implementing behavior-analytic procedures accurately and ethically.
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Seven Dimensions of ABA
Summary
Defined by Baer, Wolf, and Risley in 1968, the seven dimensions serve as the scientific and ethical foundation of ABA. Every legitimate ABA program should reflect all seven dimensions. A useful mnemonic is "A BAT GET" or the acronym "AABCETG" — most commonly remembered as "Applied, Behavioral, Analytic, Technological, Conceptually Systematic, Effective, Generality."
The Seven Dimensions Defined
| Dimension | Core Requirement |
|---|---|
| Applied | Behaviors targeted must be socially significant and meaningful |
| Behavioral | Focus on observable and measurable behavior |
| Analytic | Demonstrate a functional relationship between intervention and behavior change |
| Technological | Procedures must be described clearly enough to be replicated by any trained person |
| Conceptually Systematic | Procedures must be tied to principles of behavior science |
| Effective | Interventions must produce meaningful, practical improvements |
| Generality | Behavior changes must maintain over time, across settings, and with new people |
Key Terms
Watch Out For
> ⚠️ "Technological" ≠ "technology." This dimension is about procedural clarity and replication, not electronic devices. A procedure is "technological" if a trained stranger could read it and implement it correctly.
> ⚠️ "Analytic" requires proof. Simply observing that behavior improved is not enough — you must demonstrate that the intervention caused the change (experimental control).
> ⚠️ Generality is not the same as generalization. Generality is a dimension of ABA; generalization is a behavioral process. Know both.
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Behavior Fundamentals
Summary
ABA defines behavior precisely and scientifically. Understanding what constitutes behavior, how it is structured, and the context in which it occurs is the foundation for all assessment and intervention work.
Key Concepts
- Not behavior: internal states like "feeling sad" unless operationally defined
- Antecedent → Behavior → Consequence
- Describes the context in which behavior occurs and what follows it
- Example: hitting, kicking, and biting may all be in the same response class if they all result in escape
Extinction
Key Terms
Watch Out For
> ⚠️ Extinction bursts are expected, not failures. When implementing extinction, an initial increase in behavior is normal. Stopping the procedure during an extinction burst will reinforce the burst-level behavior.
> ⚠️ A behavior must be both observable AND measurable. "Feeling anxious" is not a behavior in ABA terms. "Biting fingernails" is.
> ⚠️ Response class ≠ response topography. Members of a response class look different but serve the same function. Topography refers to what the behavior looks like.
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Reinforcement
Summary
Reinforcement is any consequence that increases the future frequency of a behavior. It is the most fundamental principle for building and maintaining behavior. Understanding schedules, types, and motivating operations is critical for the RBT exam.
Types of Reinforcement
| Type | Definition | Example |
|---|---|---|
| Positive Reinforcement | Adding a stimulus that increases behavior | Giving praise after a correct response |
| Negative Reinforcement | Removing an aversive stimulus that increases behavior | Turning off an alarm when a lever is pressed |
> 🔑 Key Rule: "Positive" and "Negative" refer to adding or removing a stimulus — NOT good or bad. Both types increase behavior.
Reinforcement Schedules
| Schedule | Description | Key Feature |
|---|---|---|
| CRF (Continuous) | Reinforces every response | Fast acquisition; least resistant to extinction |
| Intermittent | Reinforces only some responses | Slower acquisition; more resistant to extinction |
| Fixed Ratio (FR) | Set, predictable number of responses | Post-reinforcement pause; high response rate |
| Variable Ratio (VR) | Unpredictable average number of responses | Highest and most consistent response rate |
| Fixed Interval (FI) | First response after a fixed time is reinforced | Scallop pattern; slow, then rapid responding |
| Variable Interval (VI) | First response after variable time is reinforced | Steady, consistent response rate |
Motivating Operations (MOs)
1. The effectiveness of a reinforcer (its value)
2. The frequency of behaviors associated with obtaining that reinforcer
- Example: Food deprivation makes food more reinforcing
- Example: Eating a large meal makes food less reinforcing
Key Terms
Watch Out For
> ⚠️ Negative reinforcement is NOT punishment. Negative reinforcement increases behavior by removing something aversive. This is one of the most commonly confused concepts on the exam.
> ⚠️ VR schedules are most resistant to extinction because the learner can never predict when the next reinforcer is coming (think: slot machines).
> ⚠️ CRF produces the quickest acquisition but the least resistance to extinction — use it early in training, then thin to intermittent schedules.
> ⚠️ A reinforcer is defined by its effect, not its nature. Something is only a reinforcer if it actually increases the behavior. You cannot assume praise is reinforcing without data.
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Punishment
Summary
Punishment is any consequence that decreases the future frequency of a behavior. Like reinforcement, it can involve adding or removing a stimulus. ABA does not endorse punishment casually — it is used only when justified by ethical and clinical considerations, with the least restrictive effective procedure preferred.
Types of Punishment
| Type | Definition | Example |
|---|---|---|
| Positive Punishment | Adding an aversive stimulus to decrease behavior | Verbal reprimand contingent on hitting |
| Negative Punishment | Removing a desired stimulus to decrease behavior | Taking away tokens contingent on aggression |
Common Punishment Procedures
Key Terms
Watch Out For
> ⚠️ Punishment does NOT mean physical pain. In ABA, punishment is defined functionally — any consequence that decreases behavior is a punisher, regardless of whether it is physical.
> ⚠️ Both positive AND negative punishment decrease behavior. Students frequently confuse the reinforcement/punishment distinction. Always ask: "Did the behavior increase or decrease?"
> ⚠️ Punishment does not teach what TO do. It only suppresses behavior. Always pair punishment with reinforcement of an alternative behavior (like DRA/DRI) for ethical and effective intervention.
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Stimulus Control & Antecedents
Summary
Stimulus control describes how environmental cues come to reliably predict when behavior will or will not be reinforced. Understanding antecedent stimuli, prompts, and discrimination training is essential for both skills acquisition and behavior reduction programs.
Key Concepts
Generalization vs. Discrimination
| Concept | Definition | Example |
|---|---|---|
| Stimulus Generalization | Behavior trained with one stimulus also occurs with similar stimuli | Child calls all four-legged animals "dog" |
| Stimulus Discrimination | Behavior comes under control of a specific stimulus via differential reinforcement | Child says "dog" only when a dog is present |
Prompts and Prompt Fading
- Types: verbal, gestural, modeling, physical, positional, visual
- Goal: Independent responding without prompts (avoiding prompt dependency)
Key Terms
Watch Out For
> ⚠️ Prompts are temporary tools. Their purpose is to fade, not remain. Failing to fade prompts can create prompt dependency.
> ⚠️ Generalization is usually desirable; over-generalization can be a problem. Programming for appropriate generalization is a clinical goal, but stimulus generalization that is too broad may need to be narrowed through discrimination training.
> ⚠️ SD does not force the behavior — it signals opportunity. The SD increases the probability of a response because that response has been reinforced in its presence, not because it compels action.
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Functions of Behavior
Summary
All behavior serves a purpose (a "function"). Identifying the function is the cornerstone of effective, individualized behavior intervention. Treating behavior without knowing its function risks using the wrong strategy and can inadvertently reinforce problem behavior.
The Four Functions of Behavior
| Function | Category | Description | Example |
|---|---|---|---|
| Attention / Tangibles | Social Positive Reinforcement | Behavior is maintained by gaining social attention or preferred items | Tantrum to get a toy |
| Escape / Avoidance | Social Negative Reinforcement | Behavior is maintained by removing/avoiding demands or aversive events | Aggression to leave class |
| Automatic Positive | Non-social | Behavior produces its own sensory stimulation | Hand-flapping for sensory input |
| Automatic Negative | Non-social | Behavior reduces internal aversive stimulation (pain attenuation) | Rocking to reduce internal discomfort |
Functional Behavior Assessment (FBA)
Function-Based Interventions
| Intervention | Definition | Key Feature |
|---|---|---|
| FCT (Functional Communication Training) | Teaches a functionally equivalent communicative response to replace problem behavior | Targets the same function as the problem behavior |
| DRA (Differential Reinforcement of Alternative) | Reinforces an appropriate alternative behavior; problem behavior on extinction | Alternative may or may not be physically incompatible |
| DRI (Differential Reinforcement of Incompatible) | Reinforces a behavior physically impossible to do simultaneously with problem behavior | Specific type of DRA with physical incompatibility requirement |
| DRO (Differential Reinforcement of Other) | Delivers reinforcement after a time interval during which problem behavior did not occur | Reinforces the absence of the target behavior |
Key Terms
Watch Out For
> ⚠️ Treating behavior without knowing its function can backfire. Example: Using escape as a consequence for a behavior maintained by escape will reinforce the problem behavior.
> ⚠️ DRI is a specific type of DRA — not a separate category. All DRI is DRA, but not all DRA is DRI. DRI requires physical impossibility, not just an appropriate alternative.
> ⚠️ DRO reinforces the absence of behavior, not a specific behavior. It can reduce behavior but does not teach what to do instead — best combined with DRA or FCT.
> ⚠️ FCT must target the same function. Teaching a child to raise their hand (when aggression is escape-maintained) will not be effective. The replacement must access the same reinforcer.
> ⚠️ "Automatic" does not mean the same as "unknown." Automatic reinforcement means the reinforcement is produced by the behavior itself (sensory), without requiring another person.
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Quick Review Checklist
Use this checklist to confirm you can explain each concept before your exam: