Four of the five peer-reviewed virginity pledge studies and the non-peer-reviewed study discussed below use the same federal data, the National Longitudinal Study of Adolescent Health (Add Health), in which 13,000 adolescents were interviewed in 1995, 1996, and 2000.
Apat sa limang mga kauring pag-aaral at ang mga di kauring pag-aaral na tinalakay sa ibaba gumagamit ng parehong mga pederal na datos, ang National Longitudinal Study of Adolescent Health (Add Health), kung saan 13,000 na kabataan ang ikinapanayam noong 1995, 1996, at 2000.WikiMatrix WikiMatrix