According to erik erikson, the period of postadolescence into the early 30s that focuses on developing close relationships with others is called intimacy-versus-isolation stage postformal thought social clock social role

The answer is "intimacy-versus-isolation stage".

Intimacy versus isolation in the psychological development is known to be the number six stage of Erik Erikson’s theory. The age when this happens is considered somewhere between nineteen years and forty years. In this time-frame the main struggle is focused on making lovable relations with other individuals.

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