Original sentence: "three different abstinence-only programs, Teen Aid, Sex Respect, and Values and Choice".However, The National Campaign to Prevent Teen Pregnancy described a study of.and reported that for "high school students with the most permissive sexual values, the programs did delay the initiation of sex ..."
Edited sentence: "  Kirby closed his paper by pointing out that while the evidence for the efficacy of abstinence only sex-ed was inconclusive, studies of abstinence plus style programs showed reliable benefits."  Kirby further argued that the studies included in Rector's paper "were carefully selected from a much larger number of studies precisely because they have encouraging results.Applying rigorous standards of evidence, Kirby concluded that "of the ten studies identified by the Heritage Foundation paper..., nine of them failed to provide credible evidence ... that they delayed the initiation of sex or reduced the frequency of sex.In April 2002, Robert Rector, a research fellow at the Heritage Foundation, published a paper arguing that "[a]bstinence education programs for youth have been proven to be effective in reducing early sexual activity", citing ten studies in support of this conclusion.Other studies have less encouraging results and some even have negative results.The following October saw the publication of a report by Douglas Kirby, of the National Campaign to Prevent Teen Pregnancy, re-evaluating the ten studies included in Rector's paper