In order for training to be effective, you need a clear way of communicating to your dog. The use of a reward marker (such as a click the moment a desired behavior occurs) allows the trainer to reinforce a specific behavior the moment it happens, reducing confusion and frustration between the dog and their handler. Using a marker is a simple, yet effective technique to improve your training routine.
What is a Reward Marker? #
A reward marker is a consistent cue that tells the dog the exact moment he has performed a task correctly and has earned a treat. Think of using a marker like a camera; you want to capture the correct behavior so the dog has a clear picture of what is expected. If your mark is delayed and the dog has started to offer incorrect behavior (getting up from a sit, looking away from an attention cue, etc.), the image will be blurry and the behavior may not be consistent. When used correctly, this method builds a clear connection in your dog's mind between the cue, the action, and the reward.
Common reward markers include clicking using a tool (like a box clicker or a pen) or a special word like "Yes!" or "Yay!". Options like a hand signal or (with care) a positively conditioned vibrating collar can also be used as a means of reinforcing behavior in dogs with disabilities.
It is very strongly recommended that you do NOT use a laser or flashlight as a training tool for your dog. They can cause dogs to develop compulsive light/shadow chasing behaviours that are incredibly difficult to resolve. Example example example example
Benefits of Reward Markers #
Why bother with reward markers, when you can simply give your dog a treat for offering a correct behavior?
In, Don't Shoot the Dog, Karen Pryor described how reward markers came into use with dolphins. Dolphins display a wide array of jumps and spins - imagine if you wanted to reward a jump so that the dolphin would offer that behavior more often. So you wait until the dolphin does a jump and then you call him over and give him a fish. From the dolphin's perspective what earned the fish? Probably swimming over to you. So the trainers started using whistles - once the whistle was trained as a marker the trainers could whistle while the dolphin was in the air and the dolphin would understand what earned the treat. The trainers could even begin to pick out pieces of the jump - mark when the dolphin is highest to get higher jumps.
While dogs aren't in the water, the same issues apply. With reward markers you can train your dog to spin, stick out his tongue, blink, prance, target your hand and not have to worry about how you are going to deliver the treat to him while he is in the middle of these behaviors. In fact, reward markers are sometimes called "bridges" because they help dogs understand the connection between their actions and the reward that may come a few seconds later.
Choosing a Reward Marker #
Characteristics of a Good Reward Marker #
Easy to See/Hear/Feel #
If your dog does not receive clear feedback from the marker, it won't provide the necessary information to him. If he is unsure if something is a reward marker or not, he may not be sure how to respond and become distracted or frustrated. Fortunately, most dogs have far better hearing than their human trainers, so anything you can hear should work just fine. For dogs that are hearing or sight impaired, make sure that your marker is easily distinguishable for them (an obvious hand signal, a vibration strong enough to be noticeable, etc.)
Consistent #
The more concentration your dog spends deciphering the marker the less he'll be able to focus on training. Imagine a teacher walking around a classroom, praising the students. "Wonderful, GREAT job! FANTASTIC!!!!" is the praise she offers to each pupil, but when she reaches you, "good" is the only thing she says before moving on. You might get distracted wondering why you didn't get the enthusiastic feedback the rest of the class did. Did you do something wrong? Were you somehow a disappointment?
When your marker is inconsistent, a dog may not recognize it or find it reinforcing. No matter what you choose to use for your marker, make sure it is always the same in tone, volume and emotion.
Right for Your Dog #
Start with a marker that is your dog reacts neutrally towards. Many dogs, especially young puppies, can be afraid of box clickers making training punishing or stressful. Tone of voice and emotion with verbal markers are also an important consideration. Sounding 'stern' or 'forceful' can make your puppy feel like he is doing something wrong and will not be reinforcing.
Clickers with volume control, box clickers muted with your hand, or even the click of a ball point pen can be used as mechanical markers if a normal click is distressing to your dog. Verbal marks should be something you can reproduce consistently but is not negative in tone.
Once your dog has some success with your chosen marker marker, you can use it to condition markers which he was originally scared of.
Easy to Time #
Reward markers should tell the dog exactly when and what he did right; the better your timing with the marker the better and more consistent the dog will preform.
To test how accurate your timing is with your marker, try watching the weather report on your favorite news program. Every time the weather anchor points at the map, you should be able to mark that exact moment with your reward marker. Practice until you have perfect timing. If your marker is too difficult to use consistently with a high level of accuracy, try a new tool.
Distinct from Other Sounds in the Environment #
Your mark should be loud and clear enough that your dog will be able to hear and recognize it in a variety of environments. Make sure your marker can be clearly recognized in busy, loud, quiet, big or small environments. Pen clicks, for example, would not work well outside at a distance; your voice may not stand out in a crowded room; a subtle vibration may be mistaken for something in the environment.
Reserved only for Training #
If you frequently say "OK" or "Yes" in a similar tone in conversation, your dog may wonder why he is hearing his reward marker, but not being rewarded. If you use a vibrating collar outside of a reinforcing application (such as a signal for impending punishment) you could poison your dogs expectation of the cue. You don't want the marker to become background noise - be sure you are using a cue that is unique to your training practice and always means the same thing: a treat is coming because you did something right.
Examples of Reward Markers #
Clicker #
This is the preferred marker for many trainers due to its consistency and precision. Clickers are easily heard by most dogs, the sound is neutral and consistent, precise timing is easy with practice, and it is a recognizable sound unlikely to be confused with background noise.
For some dogs, especially puppies, a clicker can be too loud or scary for them. Muting the click with your hand, hiding it in a sock or your pocket, or getting a special clicker with volume control can help. You can also try a pen that clicks in/out for a quieter version, or making a click sound with your tongue. Be sure to mute the clicker when working in close proximity to your dog as not to hurt their delicate ears. When in large, open spaces (such as outside) you will need to leave the clicker un-muted for the dog to hear it clearly.
There are two main types of clickers: Box Clickers and Button Clickers. Some other variants are also available like ring clickers, clickers built into target sticks and so on.
Voice #
This is good to train even if you primarily use a clicker. It's useful because you will always have your voice with you. It's suggested that you choose a word which you don't often say to your dog so that the marker doesn't turn into background noise.
Your voice is easy to hear, however it may not be consistent or neutral in tone. It's also harder to time well and more likely to be ignored by your dog since you are always talking and rarely does he understand what you say. These are reasons that clickers have been shown to be about 30% faster in teaching behavior than voice. Even so, it's important to have voice in your toolbox, and if you prefer not to use a tool training purely with verbal markers is absolutely fine.
I suggest the word "Yay!" or "Yep!".
Whistle #
Has the benefit that you can hear it under water or over long distances.
Hand signal #
The main drawback of a hand signal such as a thumbs up is that is relies heavily on a dog looking at you while performing the behaviour. However a very subtle hand motion can be a powerful tool for using in the middle of e.g. an obedience competition without an outside observer realising that you have given your dog a marker.
Vibration #
Vibration collars and similar devices are used primarily for deaf dogs. Make sure you properly condition the vibration as a reward marker or the vibration will very likely be startling or aversive to the dog. See our section on training disabled dogs for more information.
NOTE: Using vibration as a marker is not to be confused with using vibration as a correction. Care should also be taken that the vibration is recognized as a positive marker which may require extra time and consideration than a traditional voice/click mark. If a collar is used, it should
not have a shock or "electric stimulation" feature, and you may want to consider insulating it if it does to prevent accidental shocks which may be painful and derail training.
Conditioning a Reward Marker #
Dogs have a natural instinct to repeat behaviors or seek stimuli that are rewarding. Leverage that instinct by using your marker (click, voice, vibration, light, etc) and immediately rewarding the dog with treats, toys or attention. Your dog will quickly start to associate your mark with good things and respond appropriately. After proper conditioning, your dog will start to realize that his actions can impact the frequency of the click and will be encouraged to repeat behaviors in order to earn a click (and thus a reward). Eureka, your dog is operant!
The Rules of Reward Markers #
Rule 1: Mark exactly when the desired behavior occurs #
It's good to work on your timing to avoid confusing the animal. Have a friend bounce a ball and practice clicking when it hits the ground, or throw it and click at the high point. The more precise your clicks the quicker your dog will learn and with less frustration.
Rule 2: If you mark, you have to reward. No exceptions. #
Always. You will eventually want to put behaviors on variable rates of reinforcement (not reinforcing every time), but when you don't plan on reinforcing you should not click.
If you accidentally click a mistake, you've already reinforced the behavior by clicking. The dog is more likely to repeat what was clicked. Not feeding will only weaken the click so your dog is less likely to learn from it. That's ok, the weight of your correct clicks should override the accidental clicks. If you have too many misclicks in one session, cut it short and practice walking through your criteria without the dog. The worst that happens in clicker training is that you confuse the dog.
Rule 3: Don't move your feeding hand towards the food reward until after you've marked. #
If you start reaching for the treat before you click the dog will start watching your treat hand which will distract him from learning and listening for the click. Don't let watching the treat pouch provide the dog with any information about when the treat is coming, otherwise that will be his new favorite activity.
Resources #