What is a distinguishing feature of a mand compared to other verbal operants?

A mand is a specific type of verbal operant that is characterized by its function as a request or demand. This means that when someone uses a mand, they are directly communicating their wants or needs to another person. This type of verbal behavior is motivated by the individual’s desire to obtain something that is not currently available or to gain access to a particular item, activity, or information.

The defining feature of a mand is its control by a specific motivating operation, which means it is reliant on the current state of deprivation or aversive conditions of the speaker. For example, if a child is thirsty, they might say "water" to indicate they want a drink. Here, the verbal behavior serves a clear purpose—it prompts the listener to fulfill their request.

In contrast, other verbal operants, such as tacts or echoics, serve different functions and do not inherently involve a request. Tacts are used to label items or events in the environment, focusing on describing rather than requesting. Thus, option B accurately highlights the distinguishing feature of mands as they specifically involve a request or demand, setting them apart from other types of verbal behavior.