This user-friendly online handedness assessment tool is developed with JavaScript.
It is based on the recommended short version (Veale, 2014) of the Edinburgh Handedness Inventory (Oldfield, 1971).

After you use the mouse to indicate your preference for the four items in the table, your handedness (or laterality quotient) score will be automatically calculated.

Please indicate which hand you prefer for each of the following activities.

TaskPreferenceLeftRight
1. Writing   
2. Throwing   
3. Using a toothbrush   
4. Using a spoon   
  
Total  00

Your Handedness Score
Unknown
(Finish the ten items to see your score.)



-100
Pure left hander
<-- -50
Mixed left hander
<-- 0
   Neutral   
--> +50
Mixed right hander
--> +100
Pure right hander

Handedness score is calculated using this formula: 100*((Right - Left) / (Right + Left)).


Citations:
Oldfield, R.C. (1971). The assessment and analysis of handedness: the Edinburgh inventory. Neuropsychologia, 9(1), 97-113.
Veale, J.F. (2014). Edinburgh Handedness Inventory - Short Form: A revised version based on confirmatory factor analysis. Laterality, 19, 164-177.
Zhang, Y. (2014). Online tool for handedness assessment. Retreived from http://zhanglab.wikidot.com/handedness
PDF file: http://gade.psy.ku.dk/Readings/Oldfield1971.pdf