Peer-reviewed article
The messenger matters: Behavioral responses to sex education in a cluster randomized trial.
Angrist N, Anabwani G ·
Summary
Written by AI, not yet AICS's view · claude-haiku-4-5-20251001This study tested sex education in Botswana using a large cluster randomized trial that compared messages delivered by near-peers (older adolescents) versus government teachers. Near-peer messengers achieved a statistically significant 40% reduction in adolescent pregnancy, while the same messages from teachers had no detectable effect. Both types of messengers changed students' beliefs, but only near-peers persuaded students to change their actual behavior. The findings suggest that who delivers health education matters as much as what is taught.
Key points
- Near-peer messengers reduced adolescent pregnancy incidence by 40% compared to control
- Government teachers delivering identical messages showed no detectable effect on pregnancy incidence
- Both messengers successfully changed students' beliefs about sex education topics
- Students were persuaded to change behavior only by near-peer messengers, not teachers
- The study covered approximately one-third of Botswana in a cluster randomized design
Limitations
The document does not specify the study's duration, sample sizes, or whether effects were sustained over time. It also does not detail the specific content of the educational messages, the characteristics of the near-peers, or potential mechanisms explaining why near-peers were more persuasive for behavior change.
Abstract
This article estimates the effect of sex education in a large-scale cluster randomized trial covering a third of Botswana that varied both the message and the messenger. Educational messages delivered by near-peers led to a statistically significant 40% reduction in adolescent pregnancy incidence, whereas the same messages delivered by government teachers showed no detectable effect. While both types of messengers successfully change students' beliefs, students appear to be persuaded by near-peers to change their behavior but are not persuaded by teachers. These results demonstrate the first-order role messengers can play in influencing behavior and motivate greater use of near-peer messengers to deliver sex education at scale.
Findings the Hub has extracted
Each claim below is labelled by its type of design and links back to this report.
- Intervention
- Sex education delivered by either near-peer messengers (older adolescents) or government teachers
- Population
- Adolescent students in Botswana schools
Key finding
Near-peer messengers led to a statistically significant 40% reduction in adolescent pregnancy incidence