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Evidence on the Effectiveness of Abstinence Education: An Update

by Christine Kim and Robert Rector

Heritage.org

Backgrounder #7372

Abstract: Teen sexual activity is costly, not just for teens, but also for society. Teens who engage in sexual activity risk a host of negative outcomes including STD infection, emotional and psychological harm, and out-of-wedlock childbearing. Genuine abstinence education is therefore crucial to the physical and psycho-emotional well-being of the nation's youth. In addition to teaching the benefits of abstaining from sexual activity until marriage, abstinence programs focus on developing character traits that prepare youths for future-oriented goals. When considering effective prevention program aimed at changing teen sexual behavior, lawmakers should consider all of the available empirical evidence and restore funding for abstinence education.

Teen sexual activity remains a widespread problem confronting the nation. Each year, some 2.6 million teenagers become sexually active--a rate of 7,000 teens per day.[1] Among high school students, nearly half report having engaged in sexual activity, and one-third are currently active.[2]

 

 

Sexual activity during teenage years poses serious health risks for youths and has long-term implications. Early sexual activity is associated with an increased risk of sexually transmitted diseases (STDs), reduced psychological and emotional well-being, lower academic achievement, teen pregnancy, and out-of-wedlock childbearing. Many of these risks are avoidable if teens choose to abstain from sexual activity. Abstinence is the surest way to avoid the risk of STDs and unwed childbearing.

Abstinence education "teaches abstinence from sexual activity outside marriage as the expected standard for all school age children" and stresses the social, psychological, and health benefits of abstinence.3 Abstinence programs also provide youths with valuable life and decision-making skills that lay the foundation for personal responsibility and developing healthy relationships and marriages later in life. These programs emphasize preparing young people for future-oriented goals.[3]

Studies have shown that abstinent teens report, on average, better psychological well-being and higher educational attainment than those who are sexually active.[4] Delaying the initiation of or reducing early sexual activity among teens can decrease their overall exposure to risks of unwed childbearing, STDs, and psycho-emotional harm. Authentic abstinence programs are therefore crucial to efforts aimed at reducing unwed childbearing and improving youth well-being.

Studies of Abstinence Education

This paper discusses 22 studies of abstinence education. Sixteen studies examined abstinence programs that were primarily intended to teach abstinence. Of these 16 studies, 12 reported positive findings. The other six studies analyzed virginity pledges, and of these six studies, five reported positive findings. Overall, 17 of the 22 studies reported statistically significant positive results, such as delayed sexual initiation and reduced levels of early sexual activity, among youths who have received abstinence education. Five studies did not report any significant results.

In addition to these 22 studies, five other studies have been cited in various reviews of abstinence program evaluations.[5] However, these five studies are not fully discussed in this paper for several reasons.

First, a 2007 study evaluated a voluntary component of a three-part abstinence program that focused on life skills education. The voluntary component does not represent the core abstinence curriculum of the Heritage Keepers program, but an evaluation of the abstinence curriculum is discussed in this paper. Because the students who participated in the voluntary section had already received the core abstinence education curriculum, the study effectively measured the "incremental impact" of the voluntary component, not the full program impact.[6]

A second study evaluated the Operation Keepsake program in Cleveland. While the study reported positive results (i.e., reduced levels and delayed initiation of sexual activity), the statistical significance of findings was less certain. While the findings were positive, they were statistically significant at only the 94 percent and 93 percent confidence levels--below the standard 95 percent confidence threshold.[7] An evaluation of For Keeps, an updated version of Operation Keepsake, is discussed in this paper.

A third study examined a teen pregnancy prevention program in Denmark, South Carolina, in the early 1980s.[8] Although teen pregnancy rates declined during the early intervention period, the results cannot be meaningfully interpreted because of the uncertain nature of the services received by the students.

A fourth study examined a Canadian program, which was designed as a traditional sex education program but was delivered without a contraception component in the evaluation's specific context.[9]

Finally, a fifth study analyzed the Postponing Sexual Involvement program in Atlanta in the mid-1980s.[10] Although the study reported positive findings (i.e., delayed onset of sexual activity), the content of the program has been questioned. For example, was the intervention a pure abstinence program, or were other components critical?

Study Design

The research field of abstinence program evaluation is developing, so only a handful of programs has been evaluated thus far.[11] Currently, several hundred abstinence programs are in operation nationwide. These programs vary substantially in the youth populations that they serve, in their implementation, and in their curricula. Importantly, the few evaluated programs inadequately represent the spectrum of abstinence programs. Consequently, the available findings are mostly generalizable to the specific conditions under which those particular programs were implemented and to the youth populations that they served.

The studies discussed in this paper used a variety of research methods to assess the degree to which specific abstinence programs influenced teen sexual behavior.[12]

Experimental studies have the most rigorous evaluation design. A true experiment enables the researchers to draw conclusions about the program's impact with a high degree of confidence. To simulate the scenario of how abstinence program participants would have behaved if they had not received any abstinence education, an experiment randomly assigns youths to receive or not to receive abstinence education. In theory, random assignment eliminates any systematic differences between the intervention group and the control group, making the two virtually identical except for the intervention--in this case, abstinence education. In reality, well-designed and well-implemented experiments are few. This is particularly true for abstinence program evaluation.[13]

Most of the evaluations reported in this analysis are quasi-experiments, which incorporate certain elements of experimental design, such as identifying a comparable group of youths for comparison and using statistical methods to account for pre-intervention differences between youths who received abstinence education and those who did not.

Quasi-experimental studies adjust for a host of observable factors other than abstinence education that might confound the results. Depending on the rigor of the evaluation design and the adequacy of the statistical analysis employed by the researchers, the degree of confidence with which conclusions may be drawn about the findings from non-experimental studies can vary. Consequently, all findings should be interpreted with the full context of the program and evaluation in view.

The virginity pledge studies used a longitudinal survey of self-reported data.[14] The longitudinal survey followed the same group of individuals from adolescence to young adulthood. The pledge studies applied various statistical methods to estimate the underlying relationship between pledging during adolescence and behavioral outcomes in young adulthood.

This paper focuses on the significant positive behavioral outcomes as reported by the studies, such as delayed onset of sexual activity, reduced levels of early sexual activity, and fewer sexual partners among adolescents.[15] In addition, this paper discusses five studies that reported no significant impact. (For a list of the studies, summary findings, and evaluation design characteristics, see the Appendix and the Reference List.)

While abstinence programs emphasize the message of abstinence until marriage as the standard for all school-age children, simply delaying the initiation or reducing current levels of sexual activity among teens can decrease teens' overall exposure to the risk of physical and psycho-emotional harm.

Studies That Reported Positive Behavioral Change

Positive behavioral changes were reported in 12 studies of abstinence programs. (See the Appendix and Reference List.)

Abstinence-only Intervention. A 2010 study in the medical journal Archives of Pediatrics and Adolescent Medicine, published by the American Medical Association, concludes that an "abstinence-only intervention reduced sexual initiation" as well as recent sexual activity among a group of African-American adolescents.[16] Two years after attending an eight-hour abstinence program, about one-third of the participants had initiated sexual activity, compared to nearly one-half of the non-participants who enrolled in a general health program. That is, the abstinence program reduced the rate of sexual initiation by one-third. Moreover, abstinence program participants who became sexually active were not less likely to use contraception.

By contrast, the study also evaluated two alternative interventions, one that only taught contraception (i.e., the "safe sex" approach) and another that contained both abstinence and contraception content (i.e., comprehensive sex education), and found that neither program delayed or reduced teen sexual activity.[17] Furthermore, these programs, whose main emphasis is on contraception, failed to increase use among adolescents.

The study implemented a randomized controlled experiment, the gold standard for such evaluations. Six hundred sixty-two sixth- and seventh-grade African-American students participated in the experiment. These students attended four public middle schools that served low-income communities in a northeastern U.S. city. Students were randomly assigned to attend an eight-hour abstinence-only program, an eight-hour "safe sex" program that promoted contraception, an eight- or twelve-hour comprehensive sex education program that taught both abstinence and contraception, or an eight-hour general health class without any sex education content, which served as the control group.

Reasons of the Heart. Taught over 20 class periods by certified and program-trained health educators, the Reasons of the Heart (ROH) curriculum focuses on individual character development and teaches adolescents the benefits that are associated with abstinence until marriage.

A 2008 study evaluated the ROH curriculum's impact on adolescent sexual activity among seventh grade students in three suburban northern Virginia public schools.[18] The researchers also collected data on a comparison group of seventh grade students in two nearby middle schools that did not participate in the program. Students in those schools instead received the state's standard family life education, which included two videos on HIV/ STD prevention and one on abstinence.

The evaluators surveyed seventh grade students in all five schools before and after the program. They found that, a year after the program, 32 (9.2 percent) of the 347 ROH students who were virgins at the initial survey had initiated sexual activity, compared with 31 (or 16.4 percent) of the 189 comparison group students. Controlling for the differences between the comparison group and ROH students,[19] the study reported that ROH students were half as likely as comparison group students to initiate sexual activity.[20] The evaluators concluded, "This result appears to compare favorably to the reductions in initiation achieved by some of the abstinence programs [evaluated in earlier studies]."[21]

Sex Can Wait. Sex Can Wait is a three-series abstinence education program with one series for upper-elementary students, a second for middle school students, and a third for high school students. The Sex Can Wait program lasts five weeks and offers lessons on character building, important life skills, and reproductive biology.

A 2006 study evaluated the program's long-term (18-month) impact on adolescent sexual behavior.[22] The researchers compared students who participated in Sex Can Wait to those who received their school districts' standard sex education curricula on two behavioral outcomes: overall abstinence and abstinence during the last 30 days. As the authors noted, "the study compared the effects of the Sex Can Wait curriculum to 'current practice' rather than true 'control conditions.'"[23]

The researchers found that, 18 months after the program, upper-elementary students who participated in Sex Can Wait were less likely than non-participants to report engaging in recent sexual activity. Among middle school students, participants were also less likely than non-participants to report engaging in sexual activity ever and in the preceding month before the 18-month follow-up. Finally, among high school students, the authors found reduced levels of sexual activity in the short term but not in the 18-month follow-up.[24]

Heritage Keepers. Heritage Keepers is a primary prevention abstinence program for middle school and high school students. The program offers an interactive three-year, two-level curriculum.

To assess Heritage Keepers' impact, a group of evaluators compared some 1,200 virgin students who attended schools that faithfully implemented the program to some 250 students in demographically and geographically comparable schools who did not receive the abstinence intervention.[25] One year after the program, 14.5 percent of Heritage Keepers students had become sexually active compared with 26.5 percent of the comparison group.

Overall, Heritage Keepers students "were about one-half as likely" as comparison group students to initiate sex after adjusting for pre-program differences between the two groups.[26] The study found similar results in subsets of African-American students, Caucasian students, boys, and girls.

For Keeps. A study published in 2005 evaluated the For Keeps curriculum as implemented in five urban and two suburban middle schools in the Midwest.[27] Schools were assigned by the school districts to receive the program, which was part of a county-wide teen pregnancy prevention initiative.

Taught by outside facilitators, For Keeps was a five-day curriculum with 40-minute sessions that focused on character development and the benefits of abstinence and tried to help students understand how pregnancy and sexually transmitted diseases can impede their long-term goals. It also emphasized the psycho-emotional and economic consequences of early sexual activity. The curriculum was intended both for students who had become sexually active and for those who had not.

The evaluation collected data on all students through a pretest survey, and some 2,000 youths (about 70 percent of those who took the pretest survey) responded to a follow-up survey conducted about five months after the program ended.[28] Among youths who engaged in any sexual behavior during the follow-up period, some who participated in For Keeps reported a reduction in "the amount of casual sex, as evidenced by fewer episodes of sex and fewer sexual partners" during the evaluation period,[29] although program participants did not differ from non-participants in the likelihood of engaging in sexual activity during the follow-up interval.[30]

Best Friends. The Best Friends (BF) program began in 1987 and operates in about 90 schools across the United States. The Best Friends curriculum is an abstinence-based character-building program for girls starting in the sixth grade and offers a variety of services such as group discussions, mentoring, and community activities. Discussion topics include friendship, love and dating, self-respect, decision making, alcohol and drug abuse, physical fitness and nutrition, and AIDS/STDs. The curriculum's predominant theme is encouraging youths to abstain from high-risk behaviors and sexual activity.

A 2005 study evaluated the District of Columbia's Best Friends program, which operated in six of the District's 20 middle schools.[31] The study compared data on BF participants to data from the Youth Risk Behavior Surveys (YRBS) conducted for the District. When the authors of the study compared Best Friends schools to District schools that did not have the program, they found that Best Friends schools tended to be located in the more disadvantaged sections of the city and were academically comparable to or slightly worse than the District's middle schools in general.

Adjusting for the survey year, students' age, grade, and race and ethnicity, the study reported that Best Friends girls were nearly 6.5 times more likely to abstain from sexual activity than YRBS respondents. They were 2.4 times more likely to abstain from smoking, 8.1 times more likely to abstain from illegal drug use, and 1.9 times more likely to abstain from drinking.[32]

Not Me, Not Now. Not Me, Not Now, a community-wide abstinence intervention program, targeted children ages nine through 14 in Monroe County, New York, which includes the city of Rochester. The Not Me, Not Now program devised a mass communications strategy to promote the abstinence message through paid television and radio advertising, billboards, posters distributed in schools, educational materials for parents, an interactive Web site, and educational sessions in school and community settings. The program had five objectives: raising awareness of the problem of teen pregnancy, increasing understanding of the negative consequences of teen pregnancy, developing resistance to peer pressure, promoting parent- child communication, and promoting abstinence among teens.

Not Me, Not Now was effective in reaching early teens, with some 95 percent of the target audience in the county reporting that they had seen a Not Me, Not Now ad. During the intervention period, there was a statistically significant positive shift in attitudes among pre-teens and early teens in the county.

The sexual activity rate of 15-year-olds across the county dropped by a statistically significant amount, from 46.6 percent to 31.6 percent, during this period.[33] The pregnancy rate for girls ages 15 through 17 in Monroe County fell by a statistically significant amount, from 63.4 pregnancies per 1,000 girls to 49.5 pregnancies per 1,000. The teen pregnancy rate fell more rapidly in Monroe County than in comparison counties and upstate New York in general, and the differences in the rates of decrease were statistically significant.[34]

Abstinence by Choice. Abstinence by Choice operated in 20 schools in the Little Rock area of Arkansas. The program targeted seventh, eighth, and ninth grade students and reached about 4,000 youths each year. The curriculum included a five-day workshop with speakers, presentations, skits, videos, and an adult mentoring component.

A 2001 evaluation analyzed a sample of 329 students and found that only 5.9 percent of eighth grade girls who had participated in Abstinence by Choice a year earlier had initiated sexual activity compared with 10.2 percent of non-participants. Among eighth grade boy participants, 15.8 percent had initiated sexual activity, compared with 22.8 percent among non-participating boys.[35] (The sexual activity rate of students in the program was compared with the rate of sexual activity among control students in the same grade and schools prior to commencement of the program.)

HIV Risk-Reduction Intervention. A 1998 study evaluated a two-day abstinence-based HIV risk-reduction intervention. The program was delivered to some 200 African-American middle school students in Philadelphia.[36] Students volunteered to participate in a weekend health promotion program, and the volunteers were then randomly assigned to an abstinence education program, a safer-sex education program, or a regular health program (the control group) delivered by trained adult and peer (high school student) facilitators.

The researchers found that, during the three-month follow-up, students in the abstinence programs were less likely to report having engaged in recent sexual activity compared with students in the control group and that they were marginally less likely to report having engaged in recent sexual activity compared to students in the safer-sex program.[37]

Although the three groups generally did not differ in their reports of sexual activity in the preceding three months during the six-month and 12-month follow-ups, the researchers did report that, among students who had sexual experience before the intervention, those in the safer-sex group reported fewer days of sexual activity on average than students in the control group and the abstinence group reported.

Stay SMART. Delivered to Boys and Girls Clubs of America participants, Stay SMART integrated abstinence education with substance-use prevention and incorporated instructions on general life skills as well. The 12-session curriculum, led by Boys and Girls Club staff, used a postponement approach to early sexual activity and targeted both sexually experienced and sexually inexperienced adolescents. Participation in Boys and Girls Clubs and Stay SMART was voluntary.

A 1995 study evaluated Stay SMART's impact on adolescent sexual behavior. The study measured the sexual attitudes and behavior of more than 200 youths who participated in Stay SMART or Stay SMART plus the boosters and compared their outcomes to some 100 youths who did not participate in Stay SMART but were still involved in the Boys and Girls Clubs.[38] The analysis controlled for demographic and baseline characteristics to test for the program's independent effect on adolescent sexual behavior and attitudes.

The study found that, two years after the program, youths who had engaged in prior sexual activity and participated in the stand-alone Stay SMART program exhibited reduced levels of recent sexual activity compared with non-participants and, interestingly, participants in the Stay SMART-plus-boosters program as well.[39] Among participants who were virgins prior to the program, the study did not find a statistically significant program effect.

Project Taking Charge. Project Taking Charge was a six-week abstinence curriculum delivered in home economics classes during the school year. It was designed for use in low-income communities with high rates of teen pregnancy. The curriculum contained elements on self-development; basic information about sexual biology (e.g., anatomy, physiology, and pregnancy); vocational goal-setting; family communication; and values instruction on the importance of delaying sexual activity until marriage.

The program was evaluated in Wilmington, Delaware, and West Point, Mississippi, based on a small sample of 91 adolescents.[40] Control and experimental groups were created by randomly assigning classrooms either to receive or not to receive the program. The students were assessed immediately before and after the program and at a six-month follow-up. In the six-month follow-up, Project Taking Charge was shown to have had a statistically significant effect in increasing adolescents' knowledge of the problems associated with teen pregnancy, the problems of sexually transmitted diseases, and reproductive biology.

The program may also have delayed the onset of sexual activity among some of the participants. About 23 percent of participants who were virgins at the pretest initiated sexual activity during the follow-up interval, compared with 50 percent of the youths in the control group, although the authors urged caution in interpreting these numbers due to the small sample size.[41]

Teen Aid and Sex Respect. An evaluation of the Teen Aid and Sex Respect abstinence programs in three Utah school districts reported that certain groups of youths who received these programs delayed the initiation of sexual activity.[42] To determine the effects of the programs, students in schools with the abstinence programs were compared with students in similar control schools within the same school districts. Statistical adjustments were applied to control for any initial differences between program participants and control group students.

In the aggregate sample, the researchers did not find any differences in the rates of sexual initiation between youths who had received abstinence education and those who had not. However, analyzing a cohort of high school students who had fairly permissive attitudes,[43] they found that program participants were one-third less likely to engage in sexual activity one year after the programs compared with non-participants (22.4 percent versus 37 percent).[44]

Even when the researchers adjusted for students' dating and drinking behavior, religious involvement, family composition, peer pressure, and other factors, the differences between the two groups remained statistically significant. (Statistically significant changes in behavior were not found among a similar group of junior high school students.) The researchers found it notable that youths who had more permissive attitudes were "not only receptive and responsive to the abstinence message in the short run, but that some influence on behavior [was] also occurring."[45]

Virginity Pledge Studies

Using the National Longitudinal Study of Adolescent Health (Add Health), a nationally representative sample of American youth,[46] several studies have found that adolescent virginity pledging was associated with delayed or reduced levels of teen sexual activity, other risky behaviors, teen pregnancy, and STDs. (See the Appendix and the Reference List.)

Delayed Sexual Activity. A 1997 study published in the Journal of the American Medical Association examined a large national sample of teenagers in the seventh through 12th grades.[47] The study compared students who had taken a formal virginity pledge with students who had not taken a pledge but were otherwise identical in race, income, school performance, degree of religiousness, and other social and demographic factors. Based on this analysis, the authors found that the level of sexual activity among students who had taken a formal pledge of virginity was one-fourth the level of their counterparts who had not taken a pledge. The researchers also noted that "[a]dolescents who reported having taken a pledge to remain a virgin were at significantly lower risk of early age of sexual debut."[48]

Another study of the virginity pledge movement, published in 2001, found a similar association between pledging and delayed sexual activity. According to the authors:

Adolescents who pledge, controlling for all of the usual characteristics of adolescents and their social contexts that are associated with the transition to sex, are much less likely than adolescents who do not pledge, to have intercourse. The delay effect is substantial and robust. Pledging delays intercourse for a long time.[49]

Based on a sample of more than 5,000 students, the study reported that taking a virginity pledge was associated with a reduction of approximately one-third in the likelihood of early sexual activity, adjusted for a host of other factors linked to sexual activity rates including gender, age, physical maturity, parental disapproval of sexual activity, school achievement, and race. When taking a virginity pledge was combined with strong parental disapproval of sexual activity, the probability of initiating sexual activity was reduced by 75 percent or more. The authors did note that the pledge effect depended on youths' age and their peer group context.

Life Outcomes in Young Adulthood. By the third wave of the Add Health survey, administered in 2001, respondents had reached young adulthood, ranging between 19 and 25 years of age. In some cases, the virginity pledge may have been taken up to seven years earlier. Nonetheless, for many respondents, the delaying effect associated with pledging during adolescence appeared to last into young adulthood.

Analyzing the most recent Add Health data, a 2004 study found that adolescent virginity pledging was linked to a number of positive life outcomes.[50] For example, a 22-year-old white female pledger from an intact family with median levels of family income, academic performance, self-esteem, and religious observance was two-thirds less likely to become pregnant before age 18 and 40 percent less likely to have a birth out of wedlock compared with a non-pledger with identical characteristics. Strong pledgers[51] with the same characteristics were 40 percent less likely to initiate sexual activity before age 18 and had an average of one-third fewer sexual partners compared with non-pledgers with the same demographic profile.

STDs and Risky Sexual Behaviors. Analyzing the same sample of respondents, another study found that virginity pledging during adolescence was also associated with lower rates of STD infection among young adults. The STD rate among pledgers averaged 25 percent lower than the rate of non-pledgers of the same age, gender, race, family background, and religiosity. Significantly, the study found that virginity pledging was a stronger predictor of STD reduction than condom use on five different measures of STDs.[52]

The protective effect of pledging may have extended to other behaviors as well. According to a 2005 study, young adults who took a virginity pledge during adolescence were less likely to engage in a number of risky sexual behaviors compared with those who did not take a pledge.[53]

Studies Reporting No Significant Effects

The Mathematica Study. In 2007, Mathematica Policy Research released a study that evaluated four abstinence programs: My Choice, My Future! in Powhatan, Virginia; ReCapturing the Vision in Miami, Florida; Families United to Prevent Teen Pregnancy in Milwaukee, Wisconsin; and Teens in Control in Clarksdale, Mississippi.[54] Primarily preventive in their intent, these programs focused on upper elementary and middle school children. The average age of the participants ranged from 10 to 13. Two of the sites were in urban settings, and two were in rural communities.

The four programs varied in duration and intensity. Three programs--two multi-year curricula and a one-year curriculum--required participation. Their intensity ranged from several sessions a year to daily classes. One program, an up-to-four-year curriculum, met daily but made participation optional. In that program, only about half of the students assigned to the program actually participated. Of those who participated at all, less than half attended a meaningful portion of the sessions offered.

The evaluation employed a rigorous experimental design. The researchers surveyed students four to six years after initial program enrollment to assess the impact of the four programs on youth behavior. Although long-term impact is ideal, some students in this study's sample were last surveyed later than is conventional in this field. [55] For example, at the program site with the shortest curriculum length (about one year), students averaged about 10 years old at enrollment, and the gap between program completion and the last follow-up survey was as long as five years. During this gap, the students received no additional abstinence education or intervention support.

In the final follow-up survey, the study reported no statistically significant differences between program participants and non-participants. Among both program and control groups, half of the students remained abstinent. Among students who had become sexually active by the time of the final survey, program participants and non-participants had similar rates of condom use. (The four abstinence programs did not promote contraceptive use.)

At one of the program sites, the study found that 48 percent of the program participants remained abstinent in the final follow-up compared with 43 percent of the non-participants. At the same site, program participants were also more likely (a difference of 7 percentage points) to report expectations of abstinence until marriage compared with non-participants. Although these differences were not statistically significant, the study's authors noted that, "[g]iven the smaller sample sizes available for estimate impact at the site level…the study cannot rule out modest site-specific impacts on these outcomes."[56]

WAIT Training. A 2005 study evaluated the WAIT Training abstinence education program as it was implemented in four high schools in Colorado.[57] Except for one of the program schools, students in the study's sample were mostly in the ninth grade. The study did not specify what type of sex education services, if any, students in the control group received. In the 12-month follow-up, the researchers did not find any differences in the sexual initiation transition rates between students in the program group and those in the control group.

California's Postponing Sexual Involvement (PSI). In the early 1990s, California incorporated the PSI curriculum into its statewide Education Now and Babies Later (ENABL) initiative to reduce teenage pregnancy. However, proponents of abstinence education have challenged whether or not the initiative is a genuine abstinence program given Planned Parenthood's role in its implementation.[58]

The PSI curriculum included five sessions of 45 to 60 minutes, delivered either in school or in community settings by adult or youth instructors. Youths who received PSI were also required to receive reproductive health education before beginning the PSI curriculum. Students in the control groups received the standard sexuality curriculum offered by their schools.

An experimental study evaluated California's PSI program.[59] Based on data collected on some 7,300 students, the study found no significant differences between PSI youths and non-participants in their sexual behavior, pregnancy rates, and STD rates 17 months after the program.[60] However, the study did find short-term positive effects on youths' beliefs and intentions about sexual activity and self-efficacy.

Will Power/Won't Power. In the mid-1980s, Girls Incorporated (formerly Girls Clubs of America) developed a series of programs designed to prevent teen pregnancy. Will Power/Won't Power targeted younger adolescent girls, ages 12 to 14. The program taught young girls skills to help them resist peer pressure and risky behavior. The full curriculum was delivered in six two-hour lessons.

A study evaluating the effectiveness of Will Power/Won't Power in delaying the onset of sexual activity compared some 250 participants to 155 non-participants.[61] Participants volunteered to join the program; youths who declined enrollment became the control group.

Students were surveyed a year after the program. At that point, the study found that 12.8 percent of participants versus 13.5 percent of non-participants had initiated sexual activity since the program. However, the difference was not statistically significant. Further analysis suggested that the level of program participation might have played a role.

Virginity Pledges and STDs. Drs. Hannah Brückner and Peter Bearman, who found, using the Add Health data, that "[a]dolescents who pledge are much less likely to have intercourse than adolescents who do not pledge,"[62] also analyzed the pledge effect on STD infection among young adults. They reported "no significant differences in STD infection rates between pledgers and non-pledgers, despite the fact that they [pledgers] transition to first sex later, have less cumulative exposure, fewer partners, and lower levels of nonmonogamous partners."[63]

Conclusion

Today's young people face strong peer pressure to engage in risky behavior and must navigate media and popular culture that endorse and even glamorize permissiveness and casual sex. Alarmingly, the government implicitly supports these messages by funding programs that promote contraception and "safe-sex."

In FY2008, the U.S. Department of Health and Human Services spent $610.1 million on such programs targeting teens--at least four times what it spent on abstinence education.[64] Regrettably, last year, the Obama Administration and Congress disregarded the social scientific evidence on abstinence education and eliminated all federal funding for it. Instead, they created additional funding for comprehensive sex education. In his FY2011 budget, the President proposed to increase spending on these programs.

Although 80 percent of parents want schools to teach youths to abstain from sexual activity until they are in a committed adult romantic relationship nearing marriage--the core message of abstinence education--these parental values are rarely communicated in the classroom.[65]

In the classroom, the prevailing mentality often condones teen sexual activity as long as youths use contraceptives. Abstinence is usually mentioned only in passing, if at all.[66] Sadly, many teens who need to learn about the benefits of abstaining from sexual activity during the teenage years never hear them, and many students who choose to abstain fail to receive adequate support for their decisions.

Teen sexual activity is costly, not just for teens, but also for society. Teens who engage in sexual activity risk a host of negative outcomes including STD infection, emotional and psychological harm, lower educational attainment, and out-of-wedlock childbearing.

Genuine abstinence education is therefore crucial to the physical and psycho-emotional well-being of the nation's youth. In addition to teaching the benefits of abstaining from sexual activity until marriage, abstinence programs focus on developing character traits that prepare youths for future-oriented goals.

When considering effective prevention programs aimed at changing teen sexual behavior, lawmakers should consider all of the available empirical evidence and restore funding for abstinence education.



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