Association Between The Lateralization and Aggression/Fear in

CaninesBy Livy Bergstein

Key Terms

Temperament tests: evaluate the level of fearfulness, aggressiveness, and compatibility (Ledger and Baxter, 1997; Svartberg, 2007; Taylor and Mills, 2006)

Lateralization: localization of function or activity on one side of the body in preference to the other (Merriam-Webster)

Handedness: a tendency to use one hand rather than the other (Merriam-Webster)

Key Terms ROL Research Question Hypothesis Methods Results Discussion Conclusion

http://cdn.pcwallart.com/images/husky-puppies-with-blue-eyes-wallpaper-4.jpg

Review of Literature Temperament tests: Help predict what the behavior of the

dogs will be later in life (Goddard and Beilharz, 1984, 1986)

help place the dogs with families that would best suit them

Key Terms ROL Research Question Hypothesis Methods Results Discussion Conclusion

https://www.animalkingdomaz.com/golden-retriever/

Genetic, cognitive, and environmental factors determine the cause of behavioral patterns (Krueger

and Johnson, 2008)

Review of Literature The left side of the brain= right side of body and positive feelings

(UMSED, 2011)

The right side of the brain= left side of the body and negative feelings (UMSED, 2011)

Key Terms ROL Research Question Hypothesis Methods Results Discussion Conclusion

Review of Literature

Key Terms ROL Research Question Hypothesis Methods Results Discussion Conclusion

https://retrieverman.net/2012/07/05/the-problem-with-the-claims-about-brain-size-and-the-dog-domestication/

http://humananatomychart.us

Review of LiteratureHumans possess 12 million olfactory receptor cells, while dogs have

between one and four billion cells (Berns, 2012)

The brain regions that become active in anticipation of a reward in humans also light up in dog brains when they receive a treat (Berns, 2012)

Key Terms ROL Research Question Hypothesis Methods Results Discussion Conclusion

https://www.reddit.com/r/rarepuppers/comments/6oo4kz/heckin_smart_doggo/

http://www.funnybits.mobi/2014/09/dogs-with-glasses.html

Research Question

Research Gap: Researchers have yet to find out if a dog’s lateralization is associated with their behavior.

Research Question: How does dog behavior correlate with their handedness?

Key Terms ROL Research Question Hypothesis Methods Results Discussion Conclusion

https://www.humanewatch.org/category/pets/page/14/

Hypothesis

Hypothesis: If a dog is fearful, anxious, or aggressive, then it will be left pawed

Hypothesis0: There is no correlation between lateralization and behavior

Key Terms ROL Research Question Hypothesis Methods Results Discussion Conclusion

https://www.petfinder.com/dogs/dog-care/how-to-exercise-your-dog-in-cold-weather-2/

Match Up Two: Temperament test On a scale from 0-36 Fake cat and a dog are

presentedbased off of their behavior

(shaking, panting, cowering, hiding)

Methods

Key Terms ROL Research Question Hypothesis Methods Results Discussion Conclusion

http://www.arlboston.org/wp-content/uploads/2017/01/ReconstuctionManual_2016.pdf

MethodsKey Terms ROL Research Question Hypothesis Methods Results Discussion Conclusion

Paw Shake Test

Walk Test Kong Test

https://www.wikihow.com/Temperament-Test-a-Dog

ResultsKey Terms ROL Research Question Hypothesis Methods Results Discussion Conclusion

ResultsKey Terms ROL Research Question Hypothesis Methods Results Discussion Conclusion

Results: 2 Sample T-Test

H0: µ = 0Ha: µ > 0µ = µLeft - µRight

t = �xL− �xRS.D.

Key Terms ROL Research Question Hypothesis Methods Results Discussion Conclusion

Fearfulness Levels t = 8.553293121p = 5.4728742 x 10-8

df = 17.63400002�̅�𝑥L = 11.5�3�̅�𝑥R = 1.928571429

Aggressiveness Levels

t = 1.374849956p = .0916805488df = 21.46466735�̅�𝑥L = 3.1�3�̅�𝑥R = 1.857142857

Discussion

Limitation: Mainly American Staffords and Pitbulls were be testedScientists have a better understanding of the body/brain connectionHelp scientists gain insight into dogs’ emotions (London, 2014)

Key Terms ROL Research Question Hypothesis Methods Results Discussion Conclusion

http://critterconsulting.com/info/?p=3299https://www.kongcompany.com/2014/02/11/a-healthy-smile-for-a-healthy-life/https://blog.zooplus.co.uk/2012/09/20/kong-dog-toys-for-dog-behaviour/

Discussion

Risk: Body parts placed within cageAll procedures were conducted

behind barsDisabilities such as arthritis

Key Terms ROL Research Question Hypothesis Methods Results Discussion Conclusion

https://www.pinterest.com/sztech/puppies/

Discussion Future Research: Look further into different breeds’ dominant paws based off a

different temperamentWhether left pawed dogs would be less likely to be a guiding

eye dog (Newby, 2012)

Do dogs in a shelter sleep counterclockwise or clockwise (Houpt, 2016)

Key Terms ROL Research Question Hypothesis Methods Results Discussion Conclusion

https://www.holidays4dogs.co.uk/contact/

Conclusion

Hypothesis is proven correct Left paw dogs are more

aggressive or timid than right pawed dogs This does not mean that

one should not adopt left pawed dogs!!

Key Terms

ROL Research Question Hypothesis Methods Results Discussion Conclusion

https://www.pinterest.com/explore/dog-engagement-photos/

Acknowledgement

Mentor: Katherine A. HouptVMD, PhDCornell University College of

Veterinary Medicine1963: University of Pennsylvania,

VMD1972: University of Pennsylvania,

PhD in Behavioral Psychology

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