A researcher is interested in how left-handedness is related to hemispheric specialization in the brain. She matches n = 25 right-handed students with left-handed students on their cognitive abilities. What is the purpose of this study?
1) To determine if left-handed individuals have different cognitive abilities compared to right-handed individuals
2) To investigate the relationship between left-handedness and hemispheric specialization in the brain
3) To compare the cognitive abilities of left-handed and right-handed students
4) To determine if there is a correlation between left-handedness and cognitive abilities