We have met the charming Jessica Witt before, a student of "action" perception that has been studied in the PuttingZone for 20+ years now, and Jessica is hot in our wake making up for her very recent start in the field.
The cited study is pretty insignificant, pretty typical of people in academia looking for a spot on the butt to scratch with "science" while taking a paycheck. Psychometrics is the study of the subjective estimation of perception, and psychometrics has long ago studied this sort of assymmetry in perceptions. What these folks are "adding" or purporting to add is the notion that "greater brain area" given to a body part underlies the assymmetry in the perception. Well, foot, seems like I've been reading stuff like that for years, Jessica.
Try VS Ramachandran and many others. His Phantoms in the Brain
is about the plasticity of brain areas for body parts.
This last sentence above is rather stupid: "These findings suggest that body maps in our brain may influence how we perceive our physical bodies -- for example, if there is a lot of brain area associated with our right arm, we will view it being as longer compared to our left arm." Obviously, the brain representation of body parts "influences" how we perceive the part. The second sentence is just nonsense: "If there is a lot of brain area associated with our right arm, we will view it being as longer compared to our left arm." That's stupid. What makes the perception "seem longer," as Jessica should know but apparently does not, is NOT the number or area of cells for the body part but the habitual USE of the body part. Her whole Lab teaches that one basic point, so it is a bit odd for this study to get that messed up. Not unusual, though.
Thankfully, these "psychology" folks don't seem to have anything to do with us sports movement folks.
Putting Coach and Theorist