1.1 Radical Behaviorism, Determinism & Philosophical Assumptions
Key Takeaways
- Behavior analysis rests on foundational scientific assumptions including determinism, empiricism, experimentation, replication, parsimony, philosophical doubt, and pragmatism.
- Selectionism explains behavior across three evolutionary levels: phylogenic (species history), ontogenic (individual learning history), and cultural (group practices).
- Radical behaviorism, founded by B.F. Skinner, incorporates private events (thoughts and feelings) as behavior subject to the same natural laws as public behavior, distinguishing it from mentalism and methodological behaviorism.
- Applied Behavior Analysis (ABA) translates basic laboratory principles established in the Experimental Analysis of Behavior (EAB) into socially meaningful human behavior interventions.
- The 7 dimensions of ABA (Baer, Wolf, & Risley, 1968)—Applied, Behavioral, Analytic, Technological, Conceptually Systematic, Effective, and Generality—define the professional practice standard for QBAs.
Radical Behaviorism, Determinism & Philosophical Assumptions
To master the clinical competencies required of a Qualified Behavior Analyst (QBA), one must first understand the philosophical foundation upon which the science of Applied Behavior Analysis (ABA) is built. Behavior analysis is not merely a collection of therapy techniques; it is a comprehensive natural science approach to understanding, predicting, and influencing human and animal behavior.
The Core Philosophical Assumptions of Behavior Analysis
Like all natural sciences, behavior analysis relies on a set of foundational assumptions about the universe and how knowledge is acquired. The QBA exam frequently tests these core attitudes of science:
- Determinism: The presumption that the universe is a lawful and orderly place in which all phenomena occur as the result of other events. Behavior does not occur spontaneously, randomly, or out of 'free will' devoid of physical causation. Every behavior is a function of genetic variables, biological states, and environmental events.
- Empiricism: The practice of objective observation and measurement of the phenomena of interest. Empiricism requires the behavior analyst to strip away subjective biases, personal opinions, and unverified assumptions, relying strictly on systematic, quantitative data collection.
- Experimentation: The basic strategy of science in which a factor or variable of interest (the independent variable) is systematically manipulated while observing its effects on the target behavior (the dependent variable) to determine functional relations.
- Replication: The repeating of experiments (as well as individual baseline and intervention conditions) to determine the reliability and usefulness of findings. Replication is the primary method by which scientists discover errors and ensure data accuracy.
- Parsimony: The practice of ruling out simple, logical explanations experimentally or conceptually before considering more complex or abstract explanations. Parsimonious explanations require the fewest assumptions and rely on established, basic behavioral principles.
- Philosophical Doubt: The continual questioning of what is regarded as fact. Behavior analysts must maintain a healthy skepticism, constantly re-evaluating their findings, clinical data, and intervention efficacy against ongoing scientific evidence.
- Pragmatism: The philosophical position that the truth value or functional utility of a statement or theory is measured by the extent to which it promotes effective action. In ABA, pragmatic interventions focus on outcomes that meaningfully improve a client's quality of life.
Selectionism: Phylogenic, Ontogenic, and Cultural Evolution
Behavior analysis conceptualizes behavior as a product of selectionism—the principle that environment selects behaviors through consequences across time. Selectionism occurs at three distinct levels:
| Level of Selection | Mechanism | Description & Clinical Focus |
|---|---|---|
| Phylogenic | Natural Selection | Selection that occurs over the evolutionary history of a species. It gives rise to unconditioned responses, reflex reserves, and inherited biological characteristics (e.g., respondent blink reflex to a puff of air). |
| Ontogenic | Operant Conditioning | Selection that occurs during the lifetime of an individual organism. Behaviors are selected, maintained, or weakened by environmental consequences (reinforcement and punishment). This is the primary domain of ABA practice. |
| Cultural | Cultural Transmission | Selection that occurs when group practices and customs are passed down from one generation to another within a cultural group, selected by micro- and macro-level social consequences. |
Mentalism vs. Radical Behaviorism
A critical conceptual distinction tested on the QBA exam is the contrast between mentalism, methodological behaviorism, and radical behaviorism.
Mentalism and Explanatory Fictions
Mentalism is an approach to explaining behavior that assumes an inner, mental, or hypothetical dimension exists that differs from a behavioral dimension. Mentalistic explanations rely on hypothetical constructs (e.g., 'ego', 'cognitive structures', 'intelligence quotient') and explanatory fictions (e.g., 'he aggressive because he has an angry personality').
Mentalism leads to circular reasoning: the supposed cause is inferred from the very behavior it purports to explain (e.g., 'Why does he hit?' 'Because he is hostile.' 'How do you know he is hostile?' 'Because he hits.'). This fails to identify environmental variables that can be manipulated to produce meaningful behavior change.
Methodological vs. Radical Behaviorism
- Methodological Behaviorism (associated with John B. Watson): Acknowledges the existence of mental events but excludes them from scientific analysis because they are not publicly observable. Methodological behaviorists restrict their science strictly to publicly observable behavior.
- Radical Behaviorism (founded by B.F. Skinner): A far more comprehensive philosophy that does not restrict science to public events. Skinner coined 'radical' because it includes private events (e.g., internal thoughts, feelings, physiological pain) as behavior. Under radical behaviorism, private events are viewed as real physical behaviors governed by the exact same natural laws and principles of reinforcement and punishment as public acts. Private events differ from public events only in their accessibility, not in their fundamental nature.
Experimental Analysis of Behavior (EAB) vs. Applied Behavior Analysis (ABA)
Behavior science is divided into distinct yet complementary branches:
- Behaviorism: The philosophy of the science of behavior.
- Experimental Analysis of Behavior (EAB): The basic research branch of behavior analysis. Founded by Skinner, EAB focuses on discovering fundamental principles of behavior in highly controlled laboratory settings, often using non-human subjects (e.g., pigeons, rats) and continuous automated measurement.
- Applied Behavior Analysis (ABA): The applied science branch. ABA develops and evaluates interventions designed to alter socially significant human behavior in natural settings using the basic principles discovered through EAB.
- Professional Practice Guided by Behavior Analysis: The delivery of clinical services by certified professionals (such as QBAs) who design, implement, and oversee behavior-analytic programs.
The Seven Dimensions of Applied Behavior Analysis
In their seminal 1968 paper, 'Some Current Dimensions of Applied Behavior Analysis', Donald M. Baer, Montrose M. Wolf, and Todd R. Risley defined the seven core criteria that distinguish ABA from other disciplines. Every QBA must apply these dimensions across all clinical assessments and interventions:
- Applied: Investigates socially significant behaviors with immediate importance to the client and society (e.g., communication, self-care, social skills, reduction of severe self-injury).
- Behavioral: Selects the explicit, observable, and measurable physical behavior requiring change. The target behavior itself must be measured directly in its natural context, rather than relying on self-reports or indirect surveys.
- Analytic: Demonstrates experimental and functional control over the target behavior. The analyst establishes a clear functional relation between the environmental manipulation (intervention) and the observed behavior change.
- Technological: Defines all operational procedures with sufficient clarity, detail, and explicit terminology so that any qualified reader or clinician can replicate the intervention accurately.
- Conceptually Systematic: Derives all clinical procedures and interpretations directly from the basic principles of behavior analysis (e.g., positive reinforcement, extinction, stimulus control), rather than an ad-hoc collection of unrelated tricks or non-behavioral theories.
- Effective: Improves target behaviors to a practical and clinically significant degree. Statistical significance alone is insufficient; the change must produce noticeable, practical benefits for the client's daily life.
- Generality: Produces behavior change that lasts over time (maintenance), appears in novel environments or with different people (setting/people generalization), and spreads to un-targeted related behaviors (response generalization).
Clinical Application & Exam Insights
When evaluating clinical scenarios on the QBA exam, always verify that proposed interventions align with these core assumptions. If a scenario asks why a behavior analyst refuses to attribute a client's tantrum to 'autistic frustration' or 'inner anger', the answer resides in rejecting mentalism and explanatory fictions in favor of identifying observable, environmental antecedents and consequences through empiricism and determinism.
A behavior analyst is reviewing a client's file where a previous practitioner noted, 'The client engages in severe aggression because he has an explosive personality disorder and inner rage.' How should the behavior analyst conceptualize this statement from a radical behaviorist perspective?
During a clinical supervision session, a QBA candidate explains that an intervention worked because of 'magic rapport building.' The supervisor instructs the candidate to redescribe the procedure using basic principles of behavior such as pairing, non-contingent reinforcement, and stimulus control. Which dimension of ABA is the supervisor enforcing?
Which level of selectionism accounts for the acquisition and maintenance of a child learning to tie their shoes through reinforcement during their individual life?