Oliver John, Date of Birth
TweetOliver John
Date of Birth: 09-Feb-1959
Profession: psychologist
Nationality: United States
Zodiac Sign: Aquarius 
About Oliver John
- Oliver Peter John (born February 9, 1959) is an American personality psychologist and professor of psychology at the University of California, Berkeley.
- He is known for co-developing the 1998 Big Five Inventory.
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