Effectiveness of marker training for detection dogs.
A quick click right when the dog is correct speeds learning and keeps the behavior sturdy.
01Research in Context
What this study did
Fradet et al. (2025) compared two ways to train detection dogs. One group got food only. The other group got a click sound first, then food.
Both groups learned to find a target scent. The team tracked speed, accuracy, and how well the dogs kept working when rewards stopped.
What they found
Dogs with the clicker marker learned the scent faster. They made fewer false alerts and found the target more often.
When rewards ended, these dogs kept searching longer. They also used the skill in new places better than the food-only dogs.
How this fits with other research
Pritchard et al. (1987) saw the same edge in rats. Guided prompting beat plain trial-and-error, just like the clicker beat food-only here.
Griesi-Oliveira et al. (2013) showed that delayed praise slows learning. The clicker gives instant feedback, so the new study backs up that timing rule.
O'connell (1979) worked with rats under omission schedules. Both papers use tight lab setups, but the clicker study aims for real-world dog work, not lever timing.
Why it matters
If you train any skill, add a brief marker right as the correct response happens. The sound can be a click, a tongue click, or a unique word. Follow it with the reinforcer. This tiny pause sharpens learning, cuts errors, and keeps the behavior strong when rewards thin out. Try it next time you shape a new response or work on stimulus control.
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02At a glance
03Original abstract
Training detection dogs to alert to an odor requires precision in the timing and delivery of stimulus presentations in order to condition a strong association between odor and reward and to train a desired alert behavior that communicates the presence and location of the odor source. Marker training, in which a signal that predicts a reward is used to deliver immediate feedback for a correct response and bridge the delay between the desired behavior and reward, is a popular technique in the animal training industry. However, the application of marker training to detection dog training has not been examined, and empirical evidence of the purported benefits of marker training in general is lacking. The current study evaluated the effectiveness of marker training for odor detection learning and performance. Candidate detection dogs (<i>n</i> = 28) were trained to detect and alert to a target odor either with or without the use of a clicker as a marker (<i>n</i> = 14 per group). Effectiveness of marker training was assessed by comparing rate of learning the odor discrimination and the alert response, detection accuracy and topography of the alert behavior in an odor discrimination test, generalization of learned behavior from the odor recognition setting to a novel context (i.e., open-area operational searches), and resistance to extinction. Compared to dogs trained with the reward only, dogs trained with the marker as a signal for reward completed the training phase in fewer trials, performed the alert response more accurately in the odor recognition test, indicated the location of the odor source more precisely in the operational searches, and exhibited greater resistance to extinction when the primary reward for a correct response was withheld. These results provide evidence supporting the effectiveness of markers in animal training, and demonstrate benefits specific to the challenges commonly faced in detection dog training.
, 2025 · doi:10.3389/fvets.2025.1538452