technical Information Standardization Description: Goal was to collect samples representing population of U.S. children and young adults aged 2 through 21 (and college students aged 18 through 25).* Date April 2013 through November 2014 Norm Group: (N=number of participants) Teacher Rating Scale - TRS: N = 1,700 Parent Rating Scale - PRS: N = 1,800 Student Self Report of Personality - SRP: N = 900 *U.S. population estimates obtained from the 2013 U.S. Census Bureau American Community Survey, there were 311 examiners working in 44 states Sample controlled for: Sex - Yes Race/ethnicity - Yes Geographic region - Yes SES/parent's education - Yes Community size - Yes Inclusion of children from special education classifications - Yes Scales