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Results
#1. A Board Certified Behavior Analyst (BCBA) is explaining the difference between Motivating Operations (MOs) and Discriminative Stimuli (SDs) to a supervisee, using a real-world example. They provide the following scenario ‘Imagine you are at a bustling restaurant, trying to decide what to order from the menu. You initially considered ordering the grilled fish, but then your brother, who just tried a bite from his friend’s plate, enthusiastically exclaims, Wow, the steak here looks absolutely incredible and tastes even better A few moments later, the waiter approaches your table, makes eye contact, and asks directly, What can I get for you tonight? You then confidently respond, I’ll have the steak, please’ In this specific scenario, what primarily functions as the motivating operation that influenced your ultimate choice to order the steak?
A motivating operation MO is an environmental variable that a alters the reinforcing effectiveness of some stimulus object or event and b alters the current frequency of all behavior that has been reinforced by that stimulus object or event In this scenario your brothers enthusiastic verbal statement The steak here looks absolutely incredible and tastes even better functions as a verbal establishing operation It momentarily increases the value of the steak as a potential reinforcer making it more desirable and evokes the behavior of ordering the steak It does not signal the availability of the steak rather it makes the steak more appealing The waiter asking What can I get for you tonight is the discriminative stimulus SD as it signals that reinforcement ordering food is now available Your initial desire for fish represents a preexisting MO for fish which then competes with the newly established MO for steak Your response Ill have the steak please is the target behavior itself which is evoked by the MO and occurs in the presence of the SD Understanding the nuanced distinction between MOs and SDs is fundamental in Applied Behavior Analysis as MOs explain why a behaviors frequency or intensity changes due to altered value of a consequence while SDs explain when a behavior is likely to occur due to the availability of reinforcement
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