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