In 1994, three RTI International scientists evaluated eight previously-done quantitative analyses on DARE’s efficacy that were found to meet their requirements for rigor.[25][26] The researchers found that DARE’s long-term effect couldn’t be determined, because the corresponding studies were "compromised by severe control group attrition or contamination."[26] However, the study concluded that in the short-term "DARE imparts a large amount of information, but has little or no impact on students’ drug use," and that many smaller, interactive programs were more effective.[25][27]