Evaluation

Project TND has been rigorously tested, with seven research trials and over 8,600 youth participants, to date. More than 5,700 youth from 42 high schools in Southern California, and over 2,800 youth from 45 high schools outside of California across the U.S., have participated in our research on the program. We have evaluated program effectiveness in alternative (continuation) high schools as well as regular high schools. The student populations in these schools have been ethnically diverse, including African American (5-26%), Latino/Hispanic (28-46%), Asian (1-7%) and White (36-45%) students.

To date, we have conducted seven randomized experimental studies in which schools that received the program were compared to schools that did not receive the program.

TND Summary of Trials
View the effects on drug use across the trials, and a summary of the effects.

TND Executive Summary Paper
A copy of an article summarizing the program evaluation research findings from the first three trials.

Evaluating the Efficacy of Project TND
A copy of a chapter evaluating the efficacy of Project TND with evidence from all seven research trials.