Human brain laterality markers and IQ:A comparative analysis
European Journal of Molecular & Clinical Medicine,
2020, Volume 7, Issue 10, Pages 3749-3757
AbstractIntroduction: Laterality is the preferences of individuals for use of symmetrical body parts. The intelligence of a person in associated with brain lateralization. All the markers for brain lateralization may have a correlation to the LQ level of an individual. Thus, the present study is an effort to define the correlation between IQ and hand-foot-eye preference of an individual, also included with study is the pattern of hair whorl.
Materials and methods: With total of 600 participants, this study was commenced. Edinburg Handedness Inventory, Chapman foot inventory and Miles test was used to assess handedness, footedness and eyedness respectively. Intelligence was assessed by Ravens Colored Matrices test for age group 3-11 years and Ravens Standard Progressive Matrices test for age group 12-20 years.
Results: The Ravens matrices score was significantly high in case of left handed, left footed and left eyed individuals compared to their right handed counterparts. Gender based variation in the level of intelligence was not obtained.
Conclusion: In this study left hander, left footed and left eyed individuals were found to have higher IQ levels
Key words: laterality, IQ, handedness, preference
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