A validity study of the Preschool Self-regulation Assessment (PSRA) for both research and applied purposes that includes an examination of each tasks' usability at two time points, of their structure and reliability, of differences in the components of the measure by age, gender, and socioeconomic risk status, and a description of teachers' reports on school readiness, classroom adjustment, and academic success across two periods, based on data from 313 preschoolers and their teachers enrolled in Head Start and private child care centers in Northern Virginia