Boehm-3 was standardized with 6,000 students
in Fall, 1999 and more than 4,000 students in
Spring, 2000. The sample for the English edition
was stratified by geographic region, race/
ethnicity, socioeconomic level, and urbanicity
based on U.S. Census figures. The Spanish edition
was also normed in Fall, 1999 and Spring, 2000
in bilingual classrooms in the United States. The
sample for the Spanish edition included more
than 300 children for each research phase.