3.5 Applied Verbal Behavior and Verbal Operants

3.5 Applied Verbal Behavior and Verbal Operants

In 1957, B.F. Skinner published Verbal Behavior, introducing a groundbreaking functional analysis of human language. Rather than treating language as an internal cognitive process governed by formal syntax, vocabulary, or grammar, Skinner analyzed language as operant behavior maintained by environmental antecedents and consequences. For an Applied Behavior Analysis Technician (ABAT), applying verbal behavior principles is essential for teaching effective functional communication to individuals with Autism Spectrum Disorder (ASD) and developmental delays.

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Defining Verbal Behavior

Skinner defined verbal behavior as behavior that is reinforced through the mediation of a listener, where the listener has been specifically conditioned by their verbal community to reinforce the speaker's vocal, non-vocal, written, or signed responses.

Key features of Skinner's framework:

• Focus on Function over Topography: Two identical topographies (e.g., saying the word "cookie") can represent completely different verbal operants depending on their controlling antecedents and consequences.
• Modality Independent: Verbal behavior includes vocal speech, sign language, Picture Exchange Communication System (PECS), AAC speech-generating devices, gestures, and written text.

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Topography-Based vs. Selection-Based Verbal Behavior

• Topography-Based Verbal Behavior: The speaker produces a unique motor movement or vocal effort for each concept (e.g., saying "ball", signing "ball", or writing B-A-L-L).
• Selection-Based Verbal Behavior: The speaker selects a symbol from an array of options (e.g., pointing to a picture icon on an AAC device or exchanging a PECS card).

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The Primary Elementary Verbal Operants

Skinner identified six core elementary verbal operants, classified by their specific antecedent controlling variables and consequence types:

1. The Mand

• Controlling Antecedent: Motivating Operation (MO) (deprivation or aversion).
• Response: Specifying the desired item, action, or removal.
• Consequence: Specific Reinforcement (obtaining the exact requested item or state).
• Clinical Significance: The Mand is the first verbal operant to teach in ABA because it directly benefits the learner, establishes the ABAT as a reinforcer, and replaces challenging behavior maintained by escape or tangible access.
• Example: Learner is thirsty (EO) -> Says "Juice" ($R$) -> Receives juice ($S^{R+}$).

2. The Tact

• Controlling Antecedent: Non-verbal Discriminative Stimulus ($S^D$) (an object, picture, sound, smell, texture, or internal physical sensation).
• Response: Labeling, naming, or describing the non-verbal stimulus.
• Consequence: Generalized Conditioned Social Reinforcement (GCSR) (praise, checkmark, high-five).
• Example: Child sees an airplane in the sky ($S^D$) -> Says "Airplane!" ($R$) -> ABAT says "Awesome watching!" ($GCSR$).

3. The Echoic

• Controlling Antecedent: Verbal $S^D$ (vocal auditory stimulus).
• Point-to-Point Correspondence: YES (the beginning, middle, and end of the antecedent match the response).
• Formal Similarity: YES (antecedent and response share the exact same physical modality—auditory vocal to auditory vocal).
• Consequence: Generalized Conditioned Social Reinforcement (GCSR).
• Example: ABAT says "Say cup" ($S^D$) -> Learner says "Cup" ($R$) -> ABAT says "Great repeating!" ($GCSR$).

4. The Intraverbal

• Controlling Antecedent: Verbal $S^D$ (spoken question, statement, or fill-in-the-blank).
• Point-to-Point Correspondence: NO (response does not match the antecedent word-for-word).
• Formal Similarity: May or may not share modality.
• Consequence: Generalized Conditioned Social Reinforcement (GCSR).
• Clinical Significance: Intraverbals form the basis of social conversation, answering questions, and academic discussion.
• Example: ABAT says "A dog says..." ($S^D$) -> Learner says "Woof!" ($R$) -> ABAT says "Correct!" ($GCSR$).

5. Textual

• Controlling Antecedent: Written / Printed Verbal $S^D$.
• Point-to-Point Correspondence: YES (letters match spoken phonemes).
• Formal Similarity: NO (antecedent is visual text; response is vocal speech).
• Consequence: Generalized Conditioned Social Reinforcement (GCSR).
• Example: Learner reads the printed word "CAT" ($S^D$) out loud -> Says "Cat" ($R$).

6. Transcription (Taking Dictation)

• Controlling Antecedent: Vocal Verbal $S^D$.
• Point-to-Point Correspondence: YES (spoken phonemes match written letters).
• Formal Similarity: NO (antecedent is auditory vocal; response is written motor).
• Consequence: Generalized Conditioned Social Reinforcement (GCSR).
• Example: ABAT dictates "Write cat" ($S^D$) -> Learner writes C-A-T on paper ($R$).

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Elementary Verbal Operants Summary Table

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Advanced Verbal Behavior Concepts

Listener Responding (Receptive Language)

Listener responding occurs when a verbal $S^D$ evokes a non-verbal motor action (e.g., ABAT says "Touch your nose" -> Learner touches nose; ABAT says "Point to shoe" -> Learner points to shoe). The listener acts as the audience and reinforcer provider for the speaker.

Autoclitic Operants

An autoclitic is a secondary verbal operant that modifies or alters the effect of a primary verbal operant on the listener. It provides additional context regarding the speaker's confidence, intensity, or motivation (e.g., saying "I am CERTAIN it is a dog" or "I REALLY need water").

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Transfer of Control Procedures

In clinical ABA, learners often rely on echoic or tact prompts to speak. ABATs use Transfer of Control Procedures to fade prompts systematically, transferring behavioral control to the appropriate natural antecedent ($MO$ or $S^D$).

Step-by-Step Clinical Example: Echoic-to-Mand Transfer

• Goal: Teach a non-verbal child to independently mand for a ball using an $MO$.
• Step 1 (Contrive EO): ABAT holds a high-interest bouncing ball in front of the child ($EO$ for ball).
• Step 2 (Echoic Prompt): ABAT provides a vocal prompt: "Ball."
• Step 3 (Response): Child echoes: "Ball."
• Step 4 (Transfer Trial): ABAT immediately pauses, holds up the ball without speaking ($EO$), and waits 3 seconds.
• Step 5 (Independent Mand): Child says "Ball" independently (without vocal prompt).
• Step 6 (Reinforcement): ABAT immediately hands the child the ball ($S^{R+}$).

Mimetic Behavior and Motor Imitation

On the QABA ABAT Competency Standards, candidates must identify mimetic behavior and related motor behavior. In applied verbal behavior, mimetic behavior is motor imitation: the learner copies another person's physical action under the control of a modeled stimulus, with formal similarity between the model and the response (for example, the ABAT claps and the learner claps).

• Mimetic / Motor Imitation: Nonvocal imitation of actions, gestures, or object manipulations. It is foundational for teaching play skills, self-care routines, sign language topography, and many DTT programs.
• Relation to Echoic Behavior: Echoic behavior is vocal imitation (point-to-point correspondence with a verbal model). Mimetic behavior is the motor analogue of echoic behavior.
• ABAT Application: Implement imitation programs exactly as written (model → pause → reinforce independent imitation). Do not add unplanned models, and report failures to imitate so the supervisor can adjust the prompt hierarchy.
• Motor Behavior More Broadly: Motor targets also include fine-motor, gross-motor, and oral-motor responses required by skill-acquisition programs. ABATs collect topography-accurate data and never invent new motor targets.