# **Survey Design**
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## Item and Scale/Domain Generation
See [SIEU Survey Protocol](https://osf.io/5xw3h/).
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## Participant Selection
#### **Sampled Population**
Leaders of county and state-level child welfare, mental health, and juvenile justice systems participating in a large RCT to evaluate the use of Community Development Teams to facilitate implementation of an evidence-based practice, Multidimensional Treatment Foster Care (MTFC).
#### **Sampling Strategy**
Systematic Sampling.
#### **Specific Groups/Cohorts Sampled**
3 Cohort Groups: Data on research evidence use were collected from all 3 cohorts (N=202)
- 1st Cohort Group: mental health, child welfare, and probation system leaders, supervisors, and administrators who were participating in the RCT at the time this study was conducted Proportion sample (n=140/202)
- 2nd Cohort Group: leaders of child welfare, juvenile justice, or mental health systems in California counties not participating in the RCT Proportion sample (n= 26/202)
- 3rd Cohort Group: The third group of participants were involved in a study of the use of research evidence to develop and implement policies related to psychotropic medication use among youth in foster care. Proportion sample (n=36/202)