Handedness Questionnaire Instructions For each of the activities below, please indicate: Which hand you prefer for that activity?

Do you ever use the other hand for the activity? Which hand do you prefer to use when: no pref Do you ever use

the other hand? Writing: Left Right X Yes Drawing: Left Right X Yes Throwing: Left Right X Yes Using Scissors: Left Right X Yes Using a Toothbrush: Left Right X Yes Using a Knife (without a fork): Left Right X Yes Using a Spoon: Left Right X Yes Using a broom (upper hand): Left Right X Yes Striking a Match: Left Right X Yes Opening a Box (holding the lid): Left Right X Yes items below are not on the standard inventory: Holding a Computer Mouse: Left Right X Yes Using a Key to Unlock a Door: Left Right X Yes Holding a Hammer: Left Right X Yes Holding a Brush or Comb: Left Right X Yes Holding a Cup while Drinking Left Right X Yes Evaluate

Laterality

Index (LI) Decile LI = −100 10th left −100 ≤ LI < −92 9th left −92 ≤ LI < −90 8th left −90 ≤ LI < −87 7th left −87 ≤ LI < −83 6th left −83 ≤ LI < −76 5th left −76 ≤ LI < −66 4th left −66 ≤ LI < −54 3d left −54 ≤ LI < −42 2d left −42 ≤ LI < −28 1st left −28 ≤ LI < 48 Middle 48 ≤ LI < 60 1st right 60 ≤ LI < 68 2d right 68 ≤ LI < 74 3d right 74 ≤ LI < 80 4th right 80 ≤ LI < 84 5th right 84 ≤ LI < 88 6th right 88 ≤ LI < 92 7th right 92 ≤ LI < 95 8th right 95 ≤ LI < 100 9th right LI = 100 10th right This handedness questionnaire was adapted from: Oldfield, R.C. "The assessment and analysis of handedness: the Edinburgh inventory." Neuropsychologia. 9(1):97-113. 1971. ©2008 Mark S Cohen, Updated August 19, 2008

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