. . "1981-12-06Z"^^ . "1905-10-31Z"^^ . . . "Harlow, Harry"@en . . . "1905Z"^^ . "American psychologist" . . "Harry Frederick Harlow (October 31, 1905 \u2013 December 6, 1981) was an American psychologist best known for his maternal-separation, dependency needs, and social isolation experiments on rhesus monkeys, which manifested the importance of caregiving and companionship in social and cognitive development."@en . . . . . . "Harry Harlow"@en . . "1981Z"^^ . . . . .