EFFECTS OF LATERALIZATION ON BRAIN ACTIVITY IN HUMAN

Lateralization refers to the acquisition of laterality specifically, the functional dominance of one side of the central nervous system over the other. The concept of lateralization has been extended to numerous other cognitive functions and to sensory information processing, such as somatosensory perception, hearing, and vision. However, the influence of lateralization on certain higher mental functions particularly selective attention has received little investigation. The aim of this study is to evaluate the effect of laterality on selective attention. Regarding the Stroop test, after the picture cards were distributed, the experimenter read the instructions for the current stage and started the stopwatch as soon as the subject began reading the picture cards. Our results showed that left-handers were faster than right-handers across all test conditions. Furthermore, during the naming task, left-handers took an average of 1.17 seconds compared to 1.80 seconds for right-handers (p=0.001), indicating greater efficiency. Regarding uncorrected interference errors, there is a significant difference (p=0.001): left-handers performed well, with an average of 1.42 compared to 1.90 for right-handers. Ultimately, we can conclude that individuals with left-sided lateralization perform better on the cognitive tasks presented to them than those with right-sided lateralization.