The science
Conditioned Emotional Response (CER)
You may not have heard of the phrase “Conditioned Emotional Response,” abbreviated as CER,
but if you own a dog, you have most definitely observed this phenomenon. If your dog pricks
his ears and comes racing joyfully in anticipation of a walk every time you grasp the leash,
he has formed a CER — but let’s take a deeper look at how it unfolds from a scientific
standpoint.
Animals, like humans, are born with a biological system that allows them to experience
pleasure and pain, eliciting emotional reactions. In humans, the sound of a drill may create
goose bumps if you had a bad dental experience, or the sound of the phone ringing may make
your heart race if you link it with the voice of a loved one. These emotional responses occur
swiftly and automatically, with little rational thought involved.
Similar reactions occur in dogs. Your dog’s eyes may light up when he hears the click of a
clicker because he has learnt to link its sound with rewards. Pleasure-related (appetitive)
reactions stimulate approach and contact, while fear-related (aversive) responses urge
retreat and avoidance. From an evolutionary standpoint this makes sense: to survive, animals
should seek life-sustaining reinforcers and avoid life-threatening events.
How a conditioned emotional response is built
Conditioned emotional reactions are based on associative learning (classical conditioning).
In the instance of Pavlov’s dogs, a dog learns through connections that a leash equals a
walk, a clicker equals a treat, and a white coat equals food. The brain, nervous system and
endocrine system are all involved.
The amygdala — often called the “smoke detector of the brain” — processes
memories and emotional reactions, signalling the adrenal cortex to release the hormones
(cortisol, adrenaline) that prepare for fight or flight. The dog’s brain operates in a
“hardwired,” reflex-like manner in reaction to each event, based on earlier learning by
association. This is why standard training approaches aren’t very effective at changing
behaviour: we are working on an emotional, not a cognitive, level.
Instead, behaviour modification works because we change emotions through
counter-conditioning — one conditioned response to the same stimulus is
replaced by another. A good emotional response eventually clashes with, and overrides, the
fearful one. During counter-conditioning, neurons are re-joined so the nervous system’s
adaptability improves: we change past connections between neurons, transforming a frightened
response into a pleasant, pleasurable one. That is the whole point of TAR.