The following is an article from The Annals of Improbable Research.
Dog tail-wagging research
by Otto Didact, Improbable Research staff
Detail from the study "A Vicious Cycle: A Cross-Sectional Study of Canine Tail-Chasing and Human Responses to It, Using a Free Video-Sharing Website."
Human Responses to Canine Tail-Chasing
“A Vicious Cycle: A Cross-Sectional Study of Canine Tail-Chasing and Human Responses to It, Using a Free Video-Sharing Website,” Charlotte C. Burn, PLoS ONE, vol. 6, no. 11, 2011, e26553. The author, at the Royal Veterinary College, North Mymms, Hertfordshire, UK, reports:
Tail-chasing is widely celebrated as normal canine behaviour in cultural references. However, all previous scientific studies of tail-chasing or ‘spinning’ have comprised small clinical populations of dogs with neurological, compulsive or other pathological conditions; most were ultimately euthanased. Thus, there is great disparity between scientific and public information on tail-chasing. I gathered data on the first large (n = 400), nonclinical tail-chasing population, made possible through a vast, free, online video repository, YouTubeTM.... Approximately one third of tailchasing dogs showed clinical signs, including habitual (daily or ‘all the time’) or perseverative (difficult to distract) performance of the behaviour. These signs were observed across diverse breeds. Clinical signs appeared virtually unrecognised by the video owners and commenting viewers; laughter was recorded in 55% of videos, encouragement in 43%, and the commonest viewer descriptors were that the behaviour was ‘funny’ (46%) or ‘cute’ (42%).
Detail from the study "Asymmetric Tail-Wagging Responses by Dogs to Different Emotive Stimuli."
Asymmetric Tail-Wagging Responses by Dogs