3.1 Philosophical Underpinnings of Behaviorism and ABA
Key Takeaways
- Determinism asserts that the universe is a lawful and orderly place where behavior occurs as a result of environmental events rather than accidental or mysterious causes.
- Empiricism requires objective observation, systematic measurement, and precise quantification of target behaviors without relying on subjective speculation.
- Radical behaviorism (B.F. Skinner) incorporates private events such as thoughts and feelings as behavior subject to environmental variables, distinguishing it from John B. Watson's methodological behaviorism.
- Parsimony demands that simple, logical explanations for behavior must be ruled out empirically before adopting complex or abstract explanatory constructs.
- The seven dimensions of ABA (Baer, Wolf, & Risley, 1968)—Applied, Behavioral, Analytic, Technological, Conceptually Systemic, Effective, and Generality—define applied behavioral practice.
3.1 Philosophical Underpinnings of Behaviorism and ABA
Applied Behavior Analysis (ABA) is not merely a collection of therapy techniques; it is an applied science built upon a rigorous philosophical framework known as behaviorism. For an Applied Behavior Analysis Technician (ABAT), understanding these philosophical assumptions is critical for conducting objective behavioral observations, implementing behavior intervention plans (BIPs) with high fidelity, and communicating effectively with Board Certified Behavior Analysts (BCBAs) and Qualified Behavior Analysts (QBAs).
Historical Foundations: Methodological vs. Radical Behaviorism
The scientific evolution of behaviorism progressed through two major paradigms in the 20th century:
1. Methodological Behaviorism (John B. Watson)
In 1913, John B. Watson published his seminal paper, Psychology as the Behaviorist Views It, establishing methodological behaviorism. Watson argued that for psychology to be a true natural science, it must limit its study strictly to observable behavior that can be directly seen and measured by two or more observers. Methodological behaviorists acknowledged the existence of internal mental states (thoughts, feelings, states of mind) but rejected them as subjects of scientific inquiry because they are unobservable.
2. Radical Behaviorism (B.F. Skinner)
In 1953, B.F. Skinner formulated radical behaviorism, which serves as the philosophical foundation of modern ABA. The term "radical" does not mean extreme; rather, it comes from the Latin radix (root), meaning thorough and comprehensive. Skinner included all human behavior within scientific analysis—both public events (observable actions like speaking, running, or self-injury) and private events (unobservable events taking place within the skin, such as thinking, feeling pain, or heart rate changes).
Key features of Radical Behaviorism include:
- Monism: Mind and body are not separate entities (rejecting Cartesian dualism). Private events are physical behaviors subject to the exact same natural laws and contingencies as public behaviors.
- No Special Status for Private Events: Thoughts do not cause physical actions; both thoughts and physical actions are responses influenced by environmental history and current antecedent/consequence variables.
The Core Philosophical Assumptions of Behavior Analysis
To analyze behavior scientifically, behavior analysts adhere to seven core philosophical assumptions. These assumptions form the cornerstone of all ABAT assessment and intervention strategies.
1. Determinism
Determinism is the presumption that the universe is a lawful and orderly place in which all phenomena occur as a result of other events. Behavior does not happen randomly, spontaneously, or due to "free-floating willpower." Every action is a function of genetic predisposition (phylogeny) and environmental learning history (ontogeny). When an ABAT encounters a challenging behavior, determinism dictates searching for environmental causes rather than assuming the client is being "uncooperative for no reason."
2. Empiricism
Empiricism is the practice of objective observation and measurement of the phenomena of interest. Empirical observations are independent of the observer's individual prejudices, subjective feelings, or speculative opinions. An empirical statement is: "Client engaged in 6 instances of head-banging lasting a total of 42 seconds during the 30-minute session." A non-empirical statement is: "Client was in an aggressive mood today."
3. Experimentation
Experimentation involves the systematic manipulation of environmental variables (independent variables) to observe their effects on target behaviors (dependent variables). Through controlled manipulation (such as functional analyses), behavior analysts identify functional relations between environment and behavior.
4. Replication
Replication is the repeating of experiments and interventions to determine the reliability and usefulness of findings. In clinical ABA, replication means demonstrating that an intervention consistently produces target behavior change across time, settings, and different technicians.
5. Parsimony
Parsimony requires that all simple, logical explanations for the phenomenon under study be ruled out experimentally before complex or abstract explanations are considered. If a student stops completing schoolwork, an ABAT first investigates simple environmental explanations (e.g., difficulty of task, lack of reinforcement, sensory fatigue) before assuming complex neurodevelopmental or psychological constructs.
6. Philosophic Doubt
Philosophic doubt requires the continuous questioning of what is regarded as fact. ABATs and behavior analysts must maintain a healthy skepticism, continually evaluating data to ensure interventions remain effective and updating clinical practices as new empirical evidence emerges.
7. Pragmatism
Pragmatism assesses the truth or value of a scientific explanation by its practical outcome and effectiveness. In ABA, a theory or intervention is considered valid if it produces meaningful, beneficial change in the client's everyday life.
Selectionism: The Mechanism of Behavioral Change
Behavior analysis views behavioral development through the lens of selectionism—the principle that features of an organism or behavior are selected and preserved based on their interaction with the environment across three levels:
- Phylogenic Selectionism: Evolutionary history of a species. Inherited, unconditioned reflexes (e.g., pupil constriction in bright light) selected over generations due to survival value.
- Ontogenic Selectionism: Learning history of an individual organism during its lifetime. Operant behaviors are selected, strengthened, or weakened by immediate environmental consequences.
- Cultural Selectionism: Transfer of behavioral practices and traditions across members of a group or culture through imitation and social reinforcement.
Mentalism and Explanatory Fictions
A critical skill for an ABAT is identifying and avoiding mentalism. Mentalism is an approach to explaining behavior that assumes an inner, mental, or unobservable dimension exists and directly causes or mediates behavior.
Mentalistic explanations frequently rely on explanatory fictions—circular reasoning where a hypothetical construct is invented to explain a behavior, and the behavior is then cited as proof of the construct:
- Circular Example: "Why does Tommy hit his peers? Because he has an aggressive personality." -> "How do we know Tommy has an aggressive personality? Because he hits his peers."
Explanatory fictions stall effective intervention because unobservable constructs (like "bad attitude" or "lack of motivation") cannot be directly manipulated in therapy. Instead, ABATs focus on environmental antecedents and consequences that can be observed, measured, and modified.
The Seven Dimensions of ABA (Baer, Wolf, & Risley, 1968)
In their landmark 1968 article, Some Current Dimensions of Applied Behavior Analysis, Donald Baer, Montrose Wolf, and Todd Risley defined the criteria for applied behavioral research and practice. Every ABA program implemented by an ABAT must reflect these seven dimensions:
| Dimension | Definition | ABAT Practical Example |
|---|---|---|
| Applied | Focuses on behaviors of social significance to the client and caregivers. | Teaching a non-verbal child to request food rather than teaching obscure trivia facts. |
| Behavioral | Focuses on observable, measurable behavior; measures the client's actual behavior, not self-report. | Recording frequency of physical biting rather than asking caregivers if the client felt calmer. |
| Analytic | Demonstrates a functional relation between environmental manipulations and behavior change. | Showing that self-injury consistently decreases when functional communication training is introduced. |
| Technological | Written procedures are described with sufficient clarity and detail that any trained reader can replicate them. | Following a step-by-step written protocol for task-analysis brushing teeth. |
| Conceptually Systemic | Interventions are derived from basic principles of behavior (reinforcement, punishment, extinction). | Describing token delivery as secondary positive reinforcement rather than "giving points." |
| Effective | Behavior changes to a practical, clinically meaningful degree that improves quality of life. | Reducing self-injurious behavior from 50 times per hour to 0-1 times per week. |
| Generality | Behavior change lasts over time, appears in novel environments, and spreads to untaught behaviors. | A child using a newly learned greeting with parents, teachers, and store clerks without prompting. |
ABAT Clinical Application Guidelines
When working in home, school, or clinic settings, ABATs apply these philosophical underpinnings daily:
- Reframing Parent Descriptions: When a parent says, "He was just being mean today," the ABAT operationalizes the statement: "He engaged in 3 instances of pushing his sister when she took his toy."
- Maintaining Objectivity: Data collection must occur in real-time, free from emotional bias or assumptions about client intent.
- Adhering to Protocols: ABATs follow technological treatment plans established by the supervising BCBA/QBA to preserve treatment integrity and conceptual consistency.
An ABAT is observing a client who frequently screams during academic tasks. The client's caregiver states, 'He screams because he has an angry personality and inner frustration.' The ABAT reframes this by noting that screaming consistently results in the removal of math worksheets. Which philosophical error is the caregiver making?
A behavior technician is reviewing two potential explanations for why a client claps their hands repeatedly. Explanation A suggests the client has an undiscovered subconscious impulse seeking resolution. Explanation B notes that hand-clapping produces immediate auditory feedback (automatic reinforcement). According to the principle of parsimony, which explanation should be investigated first?
Which of the seven dimensions of ABA (Baer, Wolf, & Risley, 1968) is demonstrated when a behavior analyst writes a detailed, step-by-step task analysis for handwashing that allows any new ABAT to execute the procedure with identical precision?