The hypothesis of the experiment states that when people clasp their hands, the thumb of the dominant hand may overlap the thumb of the non-dominant hand. The experiment is conducted to determine whether there is a correlation between which thumb is on top when the hands are clasped and hand dominance.
In theory, the thumb of the dominant hand should be on top when the hands are clasped.
RESEARCH DESIGN AND TESTING
Fifty volunteers were located to participate in the study.
The subjects were asked to state which was their dominant hand, then to clasp their hands together and see which thumb ended up on top.
SUMMARY OF DATA
SUBJECTS NUMBER % OF TOTAL SUBJECTS
Right handed with right thumb dominant (7) 14%
Right handed with left thumb dominant (34) 68%
Left handed with right thumb dominant (4) 8%
Left handed with left thumb dominant (5) 10%
Total number of experimental subjects (50) 100
Number of subjects per category divided by total subjects 100
As is shown in the table, 68% of subjects were right hand dominant with left thumb dominant. 14% were right handed with right thumb dominant. 10% were left handed with left thumb dominant and 8% were left handed with right thumb dominant. The majority of people in the world are right handed and that was reflected in this experiment. It is interesting to note that overall, thumb dominance is seen to be the opposite of hand dominance. This is overwhelmingly true with the right handed subjects. However, in the left handed subjects, a small majority had left thumb dominance. It is uncertain why this would be the case.
Overall, the hypothesis that thumb dominance should match hand dominance was disproven. However, the question remains as to why it appears that in left handed persons, thumb dominance generally matches hand dominance.