What is the primary function of a No Reward Marker in dog training?

• A. It signals that a reward is available immediately
• B. It is a conditioned negative punisher
• C. It indicates the session is over because reinforcement is not available
• D. It reinforces the desired behavior with praise

Answer: (B)

A No Reward Marker signals that reinforcement will not be provided for the current behavior. It becomes a conditioned negative punisher because, through consistent pairing with the absence of a reward, the marker gains aversive value and reduces the likelihood of that behavior occurring in the future. It’s not a physical punishment; it’s information the dog learns about the reinforcement contingencies. When you use the marker, you withhold reinforcement and then either ignore the undesired behavior or redirect to a behavior that will be reinforced. Over time, the dog learns which actions will lead to rewards and which will not, helping to decrease the undesired behavior.