The ATTS Temperament Test uses 10 subtests to rate a dog’s temperament, which measures unprovoked aggression, avoidance and panic tendencies. The test is intended to give pet owners and breeders a means for evaluating and predicting a dog’s behavior. Scores indicate the percentages of a given breed that passed the temperament test. The overall number of each breed tested were not necessarily equal.Here are the percentages of common breeds that passed the ATTS test in 2011.

courtesy of http://atts.org/

About Canine Temperament
Because of breed-specific dog legislation and negative publicity associated with many breeds of dogs, temperament testing has assumed an important

role for today’s dog fancier. The ATTS Temperament Test provides breeders a means for evaluating temperament and gives pet owners insight into their

dog’s behavior. It can have an impact on breeding programs and in educating owners about their dog’s behavioral strengths and weaknesses as well as

providing a positive influence on dog legislation.
What is temperament?
W. Handel, German Police Dog Trainer, in his article, “The Psychological Basis of Temperament Testing,” defines temperament as:

“the sum total of all inborn and acquired physical and mental traits and talents which determines, forms and regulates behavior in the environment”

The ATTS test focuses on and measures different aspects of temperament such as stability, shyness, aggressiveness, and friendliness as well as the

dog’s instinct for protectiveness towards its handler and/or self-preservation in the face of a threat. The test is designed for the betterment of

all breeds of dogs and takes into consideration each breed’s inherent tendencies.

The test simulates a casual walk through the park or neighborhood where everyday life situations are encountered. During this walk, the dog

experiences visual, auditory and tactile stimuli. Neutral, friendly and threatening situations are encountered, calling into play the dog’s ability

to distinguish between non-threatening situations and those calling for watchful and protective reactions