DOI: 10.3886/icpsr35638.v1
title: Randomized Experiment of Playworks Analytic Files for 2010-2011 and 2011-2012 Cohorts in Six United States Cities
title: Version 1

description: The Robert Wood Johnson Foundation (RWJF) contracted with Mathematica Policy Research and its subcontractor, the John W. Gardner Center for Youth and Their Communities (JGC) at Stanford University, to conduct a rigorous evaluation of Playworks, a program for structured play during recess, class time and after school in low-income school districts. These data were collected as part of the evaluation. Twenty-nine urban schools interested in implementing Playworks were randomly assigned to treatment and control groups during the 2010-2011 (cohort 1) or 2011-2012 (cohort 2) school years. During the one-year study period for each cohort, treatment schools received Playworks and control schools were not eligible to implement Playworks. Mathematica and JGC collected data from students, teachers and school staff at 25 cohort 1 schools in spring 2011 and an additional four cohort 2 schools in spring 2012 to document the implementation of Playworks and assess the program's impact on key outcomes related to school climate; conflict resolution and aggression; learning and academic performance; youth development; student behavior; and play, physical activity and recess. Data collection activities included administration of student and teacher surveys, collection of physical activity data via accelerometers, structured observations of recess periods and collection of administrative records.
description: The data files include weights that account for sampling and unit nonresponse. Each set of weights accounts for the probability of selection for the units of analysis (teacher, student, or recess period) and for unit nonresponse that resulted during the data collection process. Weights are constructed so that individuals in the analytic samples are representative of all eligible individuals in the study population. Weights should be applied when performing estimation and inferences.
description: ICPSR data undergo a confidentiality review and are altered when necessary to limit the risk of disclosure. ICPSR also routinely creates ready-to-go data files along with setups in the major statistical software formats as well as standard codebooks to accompany the data. In addition to these procedures, ICPSR performed the following processing steps for this data collection: Checked for undocumented or out-of-range codes..
description: Response Rates: The response rate for both the teacher and student surveys was 83 percent.
description: Datasets: 
 
 DS0: Study-Level Files 
 DS1: School Characteristics 
 DS2: Teacher Survey 
 DS3: Student Survey 
 DS4: Accelerometer (Student Level) 
 DS5: Accelerometer (Second-by-Second Observations) 
 DS6: Recess (General Information) 
 DS7: Recess (Student Interaction Observations) 
 DS8: Recess (SOPLAY Structured Observations)
description: coded on-site observation, self-enumerated questionnaire, on-site questionnaire
description: Elementary school students and teachers
description: Cases were randomly selected within the twenty-nine schools that were included in the study.