The Negativity Mismatch Technique
The Negativity Mismatch consists of an echoic memory test. The subject must differentiate between sounds of the same tone and a random, deviant tone, though such a simple task can be difficult when all sounds appear loud, painful, and high. This condition, hyperacusis, is not uncommon in victims of PTSD. In one study, response to loud tones was measured before and after cognitive-behavioral therapy of women with PTSD. Prior to therapy, loud tones were painful and unable to be distinguished from one another. However, 72% of the women responded positively to the therapy and saw a decrease in symptoms, one of which was the reduction of hyperacusis. Because of the theme of hyperacusis in PTSD and C-PTSD victims, Negativity Mismatch has had great success.
Professionals also look at which symptoms a dog may be suffering from. If the symptoms match up with those of Canine PTSD, then a diagnosis is given. This originates from PTSD with humans, as using the DSM-V is the more popular technique for a diagnosis.
Psychological Evaluations
When looking at symptoms of PTSD, potential human victims also tend to undergo a psychological evaluation. While these are not as common on dogs, getting an evaluation by animal psychologists is possible. This can include tests, medical records, interviews with owners, and observational data concerning behavior. The reason this is rarer for dogs is that much of the process of a psycholocial evaluation is dervied from speaking with the PTSD victim being assessed, such as interviews or surveys.
