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Tag: under threshold

Thresholds: The Movie

Thresholds: The Movie

Summer, a sable colored dog is lying down on a step with a toy in front of her. Her eyes are wide and her ears  very far back and in motion. She is reacting to a noise and looks extremely fearful. She is at the threshold of a fear response.
Summer at the instant she reaches threshold of fear

I have made a movie about thresholds in dog training. It gives a quick overview of the work that I presented in my webinar for the Pet Professional Guild. (Click here for a complete script of the video; or expand the audio (only) transcript below the video.)

The threshold webinar is still available as a recording ($10 members/$20 non-members of PPG) and I encourage anyone who is interested in thresholds to view it.

Also, I have previously published a blog post on the topic: Thresholds in Dog Training: How Many?

If you are a visual learner, the movie will probably be helpful. I spend a lot of time explaining the diagrams, and have an animation of what happens to the thresholds as we train.  The movie also has video examples of dogs and stimuli over the thresholds. (Plus it has a threshold of hearing test! How cool is that?**)

Threshold Movie Script

[Dogs barking]

>>EILEEN ANDERSON:

Have you ever heard a dog trainer use the term “over threshold” and wondered what it meant?

A threshold is the point or level at which something begins or changes. That’s the standard dictionary definition. But the interesting thing is that there are actually three physiological and psychological thresholds that are important when we are training our animals.

The first threshold we need to know about is the sensory threshold as defined in psychology. Here’s a definition: “The faintest detectable stimulus, of any given type, is the absolute threshold for that type of stimulus.” Have you ever heard the term, “threshold of hearing?” Right now during this slide I am playing a high frequency hum. Can you hear it? If not, it is under your threshold of hearing for that frequency. If you can hear it, it is over the threshold.

The sensory threshold is involved when our dogs are able to see, hear, or smell something new in their environment.

Another threshold is the threshold of reactivity or fear. This is the one people usually mean when they say their dog is over threshold. The most general definition of this threshold is the point at which the sympathetic nervous system responds when the animal is afraid. This causes chemical changes in the body and overt behaviors usually falling into the categories of fight, flight, or freeze.

Dogs who are aggressing are generally over the threshold of fear. Here are two other examples of dogs over that threshold.

[vet clinic noises]

>>EILEEN:

She’s panting, but it’s not hot.

She’s hyper vigilant.

Trying to escape, or hide.

And trembling.

This dog is practically paralyzed with fear.

But there’s one more threshold, and it’s located behaviorally between the other two. If one threshold is where the dog sees something, and another is where the dog freaks out about it, what’s in between?

The point at which the thing becomes aversive, where the dog starts to be uncomfortable with it.  This could be called the threshold of stimulus aversiveness.

Here is an example of a dog in a situation where a stimulus is over the threshold of aversiveness. In other words, she is stressed about something in her environment, but so far she is holding it together.

[Neighborhood noises: siren in distance, children talking, birds, a sudden thump]

>>EILEEN:

She repeatedly licks her lips and looks behind her.

She’s responding to my cues, but she’s worried about the noises.

In my webinar on thresholds in dog training, I made diagrams of these thresholds, and discussed where each of our common training protocols falls among the thresholds. Here is a summary of those diagrams.

The black line represents distance from or intensity of the stimulus.

All three of the protocols discussed here take place over the threshold of stimulus perception, since the animal has to perceive the stimulus to learn about it.

The combination of desensitization and counterconditioning is correctly practiced under the threshold of stimulus aversiveness.

Protocols that use negative reinforcement straddle the threshold of stimulus aversiveness. The animal is exposed to the stimulus at an aversive level, and escape from the aversive level of the stimulus is used as a negative reinforcer for appropriate behaviors.

The closest proximity to the aversive stimulus may be more or less than I show here; the important point is that negative reinforcement protocols have to cross the threshold of stimulus aversiveness to work.

Flooding takes place at or above the threshold of fear.

The thresholds aren’t always spaced out nicely. For example, if the threshold of perception and the threshold of aversiveness are very close together in space, a trainer using desensitization/counter conditioning would probably not use distance as the initial way to keep the stimulus non-aversive. The trainer would probably use a different form of the stimulus first. This configuration of the thresholds is probably common with wild animals.

Likewise, if the threshold of stimulus aversiveness and the threshold of fear are very close together, a negative reinforcement protocol would be very difficult to perform without risking flooding.

Finally, the thresholds move because of environmental factors, the animal’s stamina and psychological state, and of course as we train. This is what we hope will happen as we train.

For more information on thresholds, please see the links to my webinar and blog in the video description. Thanks for watching!


Coming Up:

  • BarkBusters: Myths about Barking
  • Surprising Progress on Thunderstorm phobia
  • Why Counterconditioning Didn’t “Work”  
  • How Skilled are You at Ignoring? (Extinction Part 2)
  • What if Respondent Learning Didn’t Work?

Eileenanddogs on YouTube

** For the auditory people, musicians, and nerds among us (I’m all three): I used an iPhone app to generate a high frequency sinusoid (15.5 kHz) and recorded it for the movie. I used an oscilloscope app to make sure that the sound was playing during that part of the movie, through my own computer anyway. It’s just below my threshold of hearing. Younger people can probably hear it, if their computer speakers can generate it.

Thresholds in Dog Training…HOW Many?

Thresholds in Dog Training…HOW Many?

I recently gave a webinar entitled, “Over Threshold: The Changing Definition,” for the Pet Professional Guild (PPG). The webinar is still available as a recording, and I encourage any interested folks to check it out. It is not expensive. (And thank you to everybody who already came! That was so cool to recognize some names!)

I am outlining here some basics from the webinar. The reason I created the webinar in the first place was to allay confusion in the dog community about definitions and to aid in communication. I think some straightforward definitions and a “map” will help many people and their dogs.

I argue that there are three distinct, necessary, and useful definitions of the word “threshold” in dog training. They are:

  1. Sensory threshold as defined in psychology. Here is one textbook definition: The faintest detectable stimulus, of any given type, is the absolute threshold for that type of stimulus.—Psychology, Peter Gray, 5th edition, 2007. In the webinar I go into the history, discuss types of thresholds in psychology (yes, even within the discipline there is more than one), and cite several more definitions and supporting information. There are many sensory thresholds: hearing, different aspects of vision, smell, touch, etc. One way the psych definition of absolute threshold is unfamiliar to our common use of “threshold” in training is that it is the stimulus that is above or below the threshold of the organism’s sensory capabilities. We say, “That sound is under the threshold of hearing,” not, “The dog is over its threshold of hearing.”  Organisms’ responses to sensory stimuli are often invisible to the naked eye, and the responses generally do not correlate to overt, “dramatic” behavior.
  2. Threshold in the common training sense. You can find definitions of this usage in books by Leslie McDevitt, Debbie Jacobs, Laura VanArendonk Baugh,  and more.  These definitions roughly agree. Here is Debbie Jacobs’, which is very straightforward:  The threshold is the point at which your dog can no longer deal with a trigger before reacting in a negative way (with fear or aggression).” — A Guide to Living With & Training a Fearful Dog, 2011I argue that this usage of the term generally corresponds to the response of the sympathetic nervous system: the fight/flight/freeze response or the fear response.  In this usage, it’s the dog that is said to be over threshold, not the stimulus. I also cover usages of the term “threshold” by behaviorists including Steven Lindsay, Dr. James O’Heare, and Dr. Karen Overall. They discuss dozens of sensory, physiological, and behavioral thresholds, and always specify which one they mean.
  3. Threshold of stimulus aversiveness. This threshold is the point at which an existing stimulus becomes aversive, generally because of the intensity of the exposure. I gave this threshold a name, but I didn’t invent the concept. It is necessary to locate this threshold through our dogs’  behavior when doing both desensitization/counterconditioning protocols and operant learning processes. Jean Donaldson defines it thusly: In DS/CC,  “under threshold” is: An intensity of stimulus that elicits no fear (and so the intensity of stimulus that would not function as R-)…. Not “mild fear” or “manageable fear,” it’s NO fear.–The Pitfalls of Negative Reinforcement, PPG Webinar, 2012.  Attention to this threshold is necessary also in negative reinforcement protocols that involve escape,  since the stimulus exposure must be over the threshold of aversiveness in order for escape to function as negative reinforcement.

I believe that most of the problems in discussion of thresholds in the dog training community are due to two major points of confusion: 1) Whether we’re talking about the dog or the stimulus being over threshold (confusion between Definitions #1 and #2); and 2) The fact that many of us haven’t realized there is a difference between Definitions #2 and #3.

Mapping it Out

Here is a graphic showing these three different thresholds, and where the major types of protocols for working with fearful, aggressive, or reactive dogs fall among them:

Thresholds for blog
 This graphic may be shared for educational purposes with the copyright and credits included, and I would appreciate online citations to link back to this post or the webinar page.

The combination of desensitization/counterconditioning is performed under the threshold of aversiveness, as Jean Donaldson describes. Protocols using negative reinforcement (escape/retreat from the aversive stimulus) must take place partly over the threshold of aversiveness, or else the movement away is not reinforcing. They generally go back and forth over that threshold. Finally, flooding takes place at or above the threshold of fear response. In the webinar I split things out further and map six different protocols separately; I have roughly grouped them for this graphic.

I also talk about the ways that some of the thresholds move and change, through training, external events, and the emotional state of the dog. I describe how certain protocols become more difficult if two of the thresholds are very close. For instance, for wild animals the threshold of sensory perception of a stimulus and the threshold of aversiveness of that stimulus may be practically on top of each other.  I address the often-heard claim that there is no negative reinforcement happening if the dog is “under threshold.” (Which threshold?)  Also, I discuss which protocol is likely to take place closer to the stimulus—but also why the absolute distance is not a good point of comparison.

Conclusion

I will be working further on this topic, in part because of some great questions asked at the end of the webinar, so you may expect more from me about it at some point.  For now I encourage anyone who wants further information to view the webinar.

Please note that the webinar does not have information on how to perform the above-mentioned training/conditioning protocols, on reading dog body language, or other training tips. It’s not about how to train a fearful or aggressive dog.  But the feedback I have gotten from viewers is that it has clarified an area of considerable confusion and that it will help their training.

Related Posts

Eileenanddogs on YouTube

Threshold Webinar

Threshold Webinar

Guess what, folks? If you wondered why I’m not posting much right now: I am giving a webinar through the Pet Professional Guild and have been working my butt off on that for several weeks. The webinar is Over Threshold: The Changing Definition. Click on the image below to sign up. (There is a charge: $10 for PPG members and $20 for non-members. There is one CEU available for CPDTs.)

The webinar will take place on Wednesday, February 19th, at 12:00 – 1:30 PM Central Standard Time (6:00 – 7:30 PM UTC).

<<Note: The live webinar has taken place, but is still available as a recording.>>

This will be very different from any other discussion about threshold you have ever participated in.

Be ready to find out:

  • Why there are so many different definitions of “threshold” floating around out there;
  • Why the use of the term in psychology and the use of the term in animal training don’t quite “fit”;
  • What effect this confusion has on training, and discussions about it;
  • Where desensitization/counterconditioning; negative reinforcement protocols such as are included in BAT* and  CAT**; and flooding fall with regard to these different definitions of threshold; and
  • What we can do to clear up our discourse.

Yes, those are the waters I am daring to jump into. Hope you can come!

Click on the image or the URL below.

Eileen and three dogs threshold2

Over Threshold: The Changing Definition (Still available as a recording.)

Coming up:

  • All-Natural
  • Which Dog is Playing?
  • Invisible Cues
  • How Skilled are You at Ignoring? (Extinction Part 2)
  • Is My Dog a Drama Queen?
  • More Training Errors: Cautionary Tales (I seem to have an abundance of these)

Eileenanddogs on YouTube

* Behavior Adjustment Training by Grisha Stewart

**Constructional Aggression Treatment by Kellie Snider

Dogs Who Are Eating Can Still Be Stressed

Dogs Who Are Eating Can Still Be Stressed

People often say that a way to tell whether your dog is “over threshold” is whether she will eat or not. While this can be a strong indicator, it’s not true 100% of the time.

A head shot of a tan dog with a black muzzle. Her eyes are brown and pupils are dilated. Her ears are pinned back. There are muscle ridges in her forehead. The skin along her jaws is drawn tight. She looks very, very stressed.
Clara is stressed and over threshold

First let’s go over what people generally mean by “over threshold.” In dog (and other animal) training, “over threshold” Continue reading “Dogs Who Are Eating Can Still Be Stressed”

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