Bearman and Brueckner (2001) found that teens who made a public virginity-until-marriage pledge became likely to remain sexually abstinent than similar teens who do not make the pledge.

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Explanation:

Bearman and Brueckner (2001) performed a survey and they found that teens who made a public virginity-until-marriage pledge became more likely to remain sexually abstinent than similar teens who do not make the pledge.

This was because they would strive to follow through to the public pledges they made whereas those who didn’t had no obligation to fulfilling any pledge.

i believe the answer is: description

description refers to the goal of psychologist to identify the phenomenon that being observed. this goal is being actualized by collecting data/information from various clues that observed through the phenomenon. this goal must be accomplished before pyschologist able to create methods of treatment.