Table of Contents
Core Definition and Mechanism
The Mand is a foundational concept within B.F. Skinner’s analysis of language, introduced in his seminal 1957 work, Verbal Behavior. Simply put, a mand is a type of verbal operant where the response is under the functional control of specific conditions of deprivation or aversive stimulation, now commonly referred to as Motivating Operations (MO). Unlike other forms of verbal behavior, the mand is defined entirely by the consequence it produces for the speaker, meaning it is reinforced by a characteristic and specific consequence that resolves the current state of deprivation or aversive stimulation. The fundamental mechanism is straightforward: when a speaker is deprived of something (e.g., water) or is experiencing discomfort (e.g., cold), the verbal response that has historically resulted in the removal of that deprivation or discomfort (e.g., “Water, please!” or “Close the window!”) is strengthened and is more likely to occur under similar conditions in the future.
A critical distinction of the mand is that its identification relies not on the form of the response—the sounds or written words—but strictly on the controlling variables and the resulting function. For example, the utterance “Milk” could function as a mand if the speaker is thirsty and receives milk, or it could function as a tact if the speaker is simply labeling a carton of milk in the environment. Therefore, to accurately classify a response as a mand, one must determine the context, the speaker’s current physiological state (deprivation or satiation), and the specific environmental outcome that serves as the reinforcement. While mands are often described as behaviors that “specify their reinforcement,” such as asking for a specific item, this is not a universal requirement; many mands, like a loud knock or a hand clap used to summon a servant, do not verbally describe the resulting consequence, yet they remain mands because they are controlled by the speaker’s history of receiving a specific reinforcement following that behavior.
Historical and Theoretical Context
The concept of the mand was formally introduced by the renowned behaviorist, B.F. Skinner, in his landmark 1957 theoretical text, Verbal Behavior. This work represented a radical departure from traditional linguistic analyses, which focused primarily on the structure (grammar and syntax) of language. Skinner, operating within the framework of radical behaviorism, proposed that language, or “verbal behavior,” should be analyzed functionally—just like any other operant behavior—by examining the environmental variables that control it and the consequences that maintain it. The mand was the first of six primary verbal operants (including the tact, echoic, intraverbal, textual, and transcription) that Skinner detailed, establishing a new paradigm for understanding how and why we speak.
Before Skinner’s functional analysis, requests and demands were often simply grouped under the umbrella of “imperatives” or “wishes.” Skinner’s innovation was recognizing that these requests were controlled by specific motivational states and histories of direct reinforcement, setting them apart from verbal behaviors controlled by nonverbal stimuli (tacts) or other verbal stimuli (echoics). The development of the mand concept was crucial because it provided a behavioral explanation for how a speaker’s internal state—such as hunger or pain—could directly influence and control external verbal output, thereby offering a measurable, non-mentalistic account of intentional communication. This focus on the speaker’s benefit is a key characteristic; while other verbal operants function primarily for the benefit of the listener (e.g., providing information), the mand’s immediate and primary function is to alter the environment in a way that is reinforcing to the speaker, satisfying their current need or avoiding an aversive event.
Functional Characteristics and Practical Examples
A practical example helps illustrate the precise functional control exerted by Motivating Operations (MO) over the mand. Consider a child playing outside on a hot summer day. The intense heat leads to a state of water deprivation, which functions as the MO, increasing the reinforcing effectiveness of water and increasing the probability of behaviors that have previously obtained water. The child then runs inside and says, “Juice!” The mechanism unfolds in a clear sequence of events: first, the MO (thirst/deprivation) is established; second, the verbal response (“Juice!”) is emitted; and third, the specific reinforcement (receiving the juice) occurs, reducing the deprivation and strengthening the connection between the MO and the verbal response for future occasions.
The application of the mand principle is not static; it exhibits dynamic properties which reflect the intensity of the controlling variables. The energy level, tone, or volume of the mand will often vary as a function of the magnitude of the deprivation or aversive stimulation. For instance, a mildly thirsty person might whisper, “Water, please,” while someone severely dehydrated might shout the same request with much greater force and urgency. These dynamic qualities are inherent to natural verbal behavior, distinguishing it from reading aloud from a text where the motivational variables are absent. Furthermore, once mands are acquired through a history of reinforcement, they tend to be highly permanent, remaining available in the speaker’s repertoire because the underlying motivational states (like hunger or discomfort) are recurring throughout life.
It is also important to note that while mands primarily benefit the speaker, they can yield consequences that are reinforcing to the listener as well. Skinner provided the example of the advice, “Go west!” which could lead to positive consequences for both the speaker (if they benefit from the listener’s movement) and the listener (if they find what they were seeking). Similarly, warnings like “Look out!” function as mands because they are controlled by the speaker’s aversive stimulation (seeing the danger), but if the warning is heeded, the listener benefits by avoiding the aversive stimulation.
Extensions of the Mand: Superstitious and Magical Forms
Skinner also categorized several extended mands, which occur when the controlling stimulus generalizes or when the specified reinforcement is unlikely or impossible. An extended mand occurs when a speaker emits a mand to an object, person, or animal that cannot possibly provide the specified reinforcement, yet the mand occurs because the non-reinforcing listener shares enough characteristics with previous listeners who did provide reinforcement. A common scenario involves shouting “Stop!” at a character on a movie screen who is about to face danger. Although the actor cannot hear or respond, the behavior is emitted because the visual stimuli of a person in danger have historically served as a setting for the reinforcement of warnings.
Two other specialized forms are the superstitious mand and the magical mand. A superstitious mand is directed towards an inanimate object, often resulting from a history of intermittent or accidental reinforcement. For example, yelling at an unreliable car, “Come on and start!” is a superstitious mand. While the car cannot respond, the speaker may have experienced past occasions where, coincidentally, the car started shortly after such an utterance, leading to a weak, yet persistent, form of stimulus control. In contrast, the magical mand is a verbal form where the consequences specified have never occurred and are often physically impossible. The utterance, “I wish I had a million dollars,” which has never directly produced that sum, is considered magical. Skinner suggested that much of literary speech, and potentially the analysis of prayer, falls into these extended categories, as the speaker operates on a functional relationship where the delivery of reinforcement is either uncertain, intermittent, or entirely absent.
Significance, Impact, and Clinical Application
The analysis of the mand is profoundly significant to the field of behavior analysis and psychology because it offers a precise, functional definition of requesting and demanding, behaviors critical for survival and social interaction. By defining the mand through its function (obtaining specific reinforcement) rather than its form, Skinner provided a robust framework for teaching language, particularly within applied settings. Furthermore, understanding the mand highlights that verbal behavior is fundamentally instrumental, serving the speaker’s needs by manipulating the environment. This realization is foundational to understanding the differences between self-serving communication (mands) and informational communication (tacts).
In clinical practice, particularly in Applied Behavior Analysis (ABA) and developmental psychology, teaching manding behavior is often the highest priority, especially for individuals with developmental disabilities or autism spectrum disorder. Research, such as the study conducted by Lamarre & Holland (1985), has consistently demonstrated the importance of acquiring adequate manding skills. A failure to effectively mand—that is, the inability to clearly and reliably request needs, wants, or the cessation of aversive stimuli—is frequently correlated with the emergence of severe destructive or challenging behaviors. If an individual cannot communicate their needs verbally, they often resort to non-verbal behaviors, such as aggression or self-injury, to achieve the same functional outcome (e.g., escaping a task or obtaining attention). Therefore, teaching functional mands provides a critical replacement behavior, giving the individual a socially appropriate and effective means of controlling their environment.
Connections to Other Verbal Operants
The mand belongs to the broader subfield of behaviorism and is a core component of Skinner’s theory of Verbal Behavior. It is essential to distinguish the mand from the other primary verbal operants, as they are controlled by different antecedent stimuli and maintained by different types of reinforcement. The most frequent comparison is made between the mand and the tact. A tact, derived from “making contact with” the world, is verbal behavior controlled by a non-verbal stimulus (e.g., seeing a dog and saying “dog”) and is maintained by generalized, non-specific reinforcement (e.g., praise or affirmation). The controlling stimuli for a tact are nonverbal, encompassing the whole of the physical environment. Tacting can undergo many extensions, including generic, metaphoric, metonymical, solecistic, and nomination, and is involved in abstraction. In contrast, the mand is controlled by a motivational state (MO) and is maintained by specific reinforcement.
Other related verbal operants involve control by verbal stimuli. Echoic behavior, which Skinner was among the first to seriously examine in language learning, involves a verbal response that is controlled by a verbal stimulus, where the response and stimulus share “point-to-point correspondence” and formal similarity—essentially, repeating what is heard. In echoic behavior, the stimulus is auditory and the response is vocal, and this is often seen in early shaping behavior when teaching new language or sounds. Textual behavior, another form of control by verbal stimuli, refers to behavior typically called reading or writing. Specifically, a vocal response is controlled by a written verbal stimulus (reading aloud), where the modalities differ (visual stimulus controls vocal response). These relations are distinct from the mand because neither echoic nor textual behavior is controlled by the speaker’s deprivation or motivational state; they are controlled strictly by the presence of a prior verbal stimulus.
The understanding of these distinct functional relationships is crucial for a complete analysis of language. The mand is unique among the verbal operants because it is the only one directly tied to the speaker’s immediate needs and wants, providing the behavioral mechanism for intentional communication and control over the environment.