A team led by Michael Rutter found that disorders of this phenomenon were rare in Romanian-English orphans born during the Ceauşescu (“cho-SHESS-koo”) regime. Harry Harlow studied this phenomenon in rhesus macaques by constructing cloth-and-wire “surrogates,” which inspired John Bowlby’s theory of this phenomenon. (-5[1])In an experiment studying (-5[1])this phenomenon, a stranger talked to a parent before the parent left the stranger with their child. Mary Ainsworth’s “strange situation” experiment studied this phenomenon, whose three “styles” are “secure,” (10[1]-5[1])“anxious-ambivalent,” and “anxious-avoidant.” For 10 points, name this feeling that an infant feels toward a caregiver. ■END■ (10[3])