Persistence of effects of a brief intervention on parental restrictions of teen driving privileges
DOI: 10.1136/ip.9.2.142
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Summary
This study evaluated the persistence of effects from a brief intervention designed to increase parental restrictions on teen driving privileges. Motivated by the high crash risk among newly licensed teenagers and the critical role parents play in enforcing Graduated Driver Licensing (GDL) policies, the researchers sought to determine if a short intervention delivered at the time of licensure could sustainably influence parental management of teen driving. The study employed a randomized controlled trial design involving 658 parent-adolescent dyads recruited from a Motor Vehicle Administration (MVA) site in Maryland as teens obtained provisional licenses. Participants were assigned to either an intervention or control group. Intervention parents viewed a nine-minute video highlighting teen driving risks and received a "Checkpoints" parent-teen driving agreement, followed by a newsletter one week later. Control parents received no such materials. Data were collected via telephone interviews with both parents and teens at one, four, and nine months post-licensure. Measures included communication about driving, vehicle access, restricted driving behaviors, and specific limits on passengers, road types, and night driving. Results indicated that intervention families were significantly more likely to use a driving agreement at all follow-up points, with odds ratios ranging from 3.04 to 6.46. Significant differences in parent-teen communication regarding driving rules and consequences persisted throughout the nine-month period. However, effects on driving limits declined over time. At one month, intervention parents imposed stricter limits on passengers, high-speed roads, and night driving. By four months, significant differences remained for overall limits, high-speed roads, and passenger limits. By nine months, only parent-reported weekend night restrictions and overall composite limits showed significant differences between groups. There were no significant differences in the actual amount of teen driving, traffic tickets, or crashes reported at four or nine months. The authors conclude that brief interventions delivered at MVA sites can effectively promote initial parental restrictions on teen driving, with modest persistence for at least four months. While the effects on specific driving limits decayed over time, the intervention successfully sustained improved communication and the use of formal driving agreements. The study highlights the potential for integrating such interventions into standard licensing procedures to encourage parental involvement in young driver safety, though it notes limitations regarding generalizability due to the study's specific demographic and geographic context.
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| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | OpenAlex-citations | — | — | 1 | 2026-06-25 |
| archive | success | semantic_scholar | — | — | 6 | 2026-06-26 |
| extract | success | cached | — | — | 2 | 2026-06-26 |
| clean | success | clean | — | — | 1 | 2026-06-25 |
| chunk | success | chunk | — | — | 1 | 2026-06-25 |
| embed | success | embed | Qwen/Qwen3-Embedding-8B | — | 1 | 2026-06-25 |
| promote | success | — | — | — | 1 | 2026-06-25 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 1 | 2026-06-26 |
| tag | success | vector_similarity | — | — | 6 | 2026-06-25 |
| verify | partial | — | — | — | 1 | 2026-06-26 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-26; verification: verified_with_issues.
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- Applied Guidance: countermeasure evaluation