Born This Way?


This, from last Tuesday’s Washington Post: “Fido won’t sit? Blame his genes.” This slipshod article is loosely based on a study conducted at the Department of Ethology & the Department of Medical Chemistry at 2 separate universities in Budapest, Hungary, entitled “Polymorphism in the Tyrosine Hydroxylase (TH) Gene Is Associated with Activity-Impulsivity in German Shepherd Dogs.” Still paying attention?

For me, the most fascinating finding was that, regarding this herenow gene, there was great variance between different dog breeds. (Which wasn’t the point of the study at all, mind you. They were supposed to be focusing on within-breed differences. Seem to have gotten a little sidetracked, no?) “For example, the frequency of allele 2 is 31% in Groenandaels [Belgian Shepherds to you & me], 0.89% in German shepherds, and 0.73% in wolves.” Got wolf? Yes, I do, near as dammit.

Now, to the weakest link of the study: the operational definition of Activity-Impulsivity in dogs. First they modified the standard parents-kvetching-about-their-kids ADHD checklist to “apply” to owners-kvetching-about-their-dogs. No items from this questionnaire appeared in the article. Trust them, it had great inter-rater reliability. Swell. How about validity? What they call ADHD, I might call hypervigilance [which is what my wolflike German shepherd manifests, ja?]. Or, possibly, Separation Anxiety, which she also has.

Next they conducted a 4-task individual test for 104 dog & owner pairs, with a female experimenter present. (1)”Spontaneous activity.” Dog on leash with owner [not giving any commands] for 1 minute. [How many leg movements did the dog make?] (2)”Separation & play.” With owner “hiding” behind a nearby tree & dog tied to another tree, the experimenter tries to engage the dog in a game of tug-of-war. [How active was the dog?] (3)”Lying on the side.” Owner commands the dog to lie down, then has it lie on its side for 30 seconds. [Does the dog obey?] (4)”Approaching the owner.” While experimenter holds the dog on a leash, the owner “hides” behind a tree. Then the dog is let off the leash and given the command “Go!” back to the owner. Now, get a load of this! The more quickly the dog returns to its owner, the more “ADHD” it is! Seriously.

Who knew the Hungarians placed such a premium on taking your sweet time when summoned by “the boss”?

Ooh! So, would they then predict that wolves [with an even lower frequency of the TH gene] would return to their pack leader even faster than our dog Lili? [Which I would have thought had survival value…] Wolves must be “ADHD” as all getout.

Notice that nowhere in the study was “Sitting on command” assessed.

May I suggest that you henceforth take the “Science News” section of the WaPo with a grain of salt? As they sing in Porgy & Bess, “It ain’t necessarily so.”

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Filed under ethology, murky research, sharks and jets

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