The relationship between handedness, footedness, eyedness and chewing side preference in adults

Povzetek

Lateralization manifests as a sensory or muscular preference. These preferences are often crucial for (1) handedness calculation (determined by the Edinburgh Handedness Inventory – EHI) and determination of self-reported handedness, (2) description of the relationship between handedness and different side preferences, specifically footedness, eyedness and chewing side preference. Our sample consisted of 133 laterality and EHI questionnaires filled in by healthy adults (self-reported 72 right-handed, 2 ambidextrous and 59 left-handed). Results showed that self-reported and calculated handedness were in a 100 % agreement for right-handers. There was an approximately 80 % agreement for left-handers, as only 8 individuals were classified as ambidextrous, and 2 individuals were classified as right-handers. There was a strong correlation between EHI activities and handedness. Footedness and chewing side preference showed a moderate correlation with handedness. Eyedness showed only a weak correlation. No significant sex differences were found. In conclusion, a significant relationship between self-reported and calculated handedness was found. Accuracy in categorizing handedness was 100 % for right-handers and 80 % for left-handers. Writing and drawing showed the strongest correlation with handedness, while eye preference had the weakest correlation. A crossed laterality was found more in left-handed individuals.