Youth's intentions to have sexual intercourse declined marginally from entry to exit (3.2 to 3.0, p = .08, effect size = -0.16), with no change in condom or birth control intentions¶

Claim · All claims
Evidence · 1 study (2 entries) · design r2 · q2 · i1 small
Currency · newest study 2025 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i1 Intentions to engage in sexual intercourse in the next year declined from 3.2 to 3.0 on a 1-to-4 scale, a marginally significant difference (p = .08) equivalent to an effect size of -0.16. → Nakamoto 2025 q2 i? Youth showed essentially no changes in intentions to use condoms (p = .68) or other forms of birth control (p = .72). → Nakamoto 2025 (2)

Evidence¶

Nakamoto 2025¶

Nakamoto, J., Carter, C., & Russo, S. (2025). Implementation and impact of the Project With curriculum in juvenile justice facilities and group homes. WestEd. https://eric.ed.gov/?id=ED673580

q2 · i1 · design · r2

Paired samples t-tests comparing entry and exit survey responses of youth who remained at their sites (item sample sizes 105 to 118). The decline in intentions to have sexual intercourse was "marginally significant (p = .08)" with "an effect size of -0.16, which is considered a small impact."

"The participating youth declined from an average of 3.2 at the entry survey to 3.0 at the exit survey on the 1 (no, definitely not) to 4 (yes, definitely) scale. This difference was marginally significant (p = .08) and was equivalent to an effect size of -0.16, which is considered a small impact."

Nakamoto 2025 (2)¶

Nakamoto, J., Carter, C., & Russo, S. (2025). Implementation and impact of the Project With curriculum in juvenile justice facilities and group homes. WestEd. https://eric.ed.gov/?id=ED673580

q2 · i? · design · r2

Paired samples t-tests on condom-use and birth-control intention items (sample sizes 105 to 118) found no statistically significant differences: condoms p = .68, other birth control p = .72. The report concludes Project With did not have an impact on these two outcomes; equivalence was not tested.

"The participating youth showed essentially no changes between the entry and exit surveys in their intentions to use condoms (p = .68) and other forms of birth control (p = .72)."

Discussion¶

Related Claims¶

• Youth reported a mixed pattern of impact on the success sequence: 60–61 percent were more likely to plan a steady full-time job before having a child or marrying, but only 28–35 percent were more likely to plan to delay sexual intercourse until milestones — related
• Justice-involved youth who remained at their sites completed an average of 11.0 of 12 Project With lessons, while those who left early completed 5.4 — related
• Youth most positively reported Project With's impact on goal setting, with 81 percent saying it made them more likely to make plans to reach their goals — related