Drug Use Prevention Among Girls Through a Mother-Daughter Intervention

The study has two primary and seven secondary aims. Primary Aims: * 1\. Develop a family-based girl-specific intervention (GSI) to prevent substance use. * 2\. Test the efficacy of GSI. Secondary Aims: * 3\. Test GSI to improve mediating factors of girls' mother-daughter affective quality, coping, refusal skills, mood management, conflict resolution, problem solving, self-efficacy, body esteem, normative beliefs, social supports, and mother-daughter communication. * 4\. Examine the effects of mediating factors on girls' substance use behavior. * 5\. Test GSI to improve mothers' use of family rituals, rules against substance use, child management, mother-daughter affective quality, and communication with their daughters. * 6\. Examine the effects of mother' outcomes on their daughters' substance use behavior. * 7\. Test the effects of dose on participants' outcomes. * 8\. Determine if GSI has differential outcomes related to ethnic-racial group profile. 9\. Quantify the costs of intervention development and delivery.