The Reliability and Validity of Chapman's Handedness Inventory in Junior High School Students

n order to study the reliability and validity of the Chapman’s Handedness Inventory (CHI) among junior high school students, 441 male and 559 female 6-8 graders from junior high-schools of Tehran district completed the Handedness Questionnaire of Chapman and Chapman (1987). Data showed that the Cronbach’s alpha, correlation between the two halves, and retest reliability were respectively 0.94, 0.94 and 0.92. The validity analysis revealed that all the students who according to CHI were categorized as left-handed and right-handed recognized themselves as left-handed and right-handed. Factor analysis suggested a factor which accounted for 68.43% of the total variance; all the items were loaded in this factor. In sum CHI has a good validity and reliability for distinguishing lateralization among Iranian high-school students.