- (C) Harry   Harlow  studied baby    monkeys and is  credited    with    demonstrating   the importance  of
contact comfort. Harlow’s work suggested that infants crave the physical comfort of a body.
Gilligan is known for her work challenging Kohlberg’s theory of development as gender biased.
Piaget developed a stage theory of cognitive development. Freud’s best-known contributions are
his stage theory of psychosexual development and treatment technique of psychoanalysis. 
                    
                      marvins-underground-k-12
                      (Marvins-Underground-K-12)
                      
                    
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