The American Community Survey (ACS) is a household survey conducted by the United States Census Bureau. The Census Bureau called for the conduct of about 170-180 cognitive interviews using the American Community Survey (ACS) Spanish and English Computer Assisted Telephone Interview (CATI) and Spanish and English Computer Assisted Personal Interview (CAPI) data collection instruments. This pretesting research was divided into three separate and independent sections – Section I (Demographic questions also included in the Decennial census), Section II (Housing questions), and Section III (Additional person-level questions). Each section was pretested in Phases I, II, and III respectively. Two rounds of cognitive interviews were administered for each phase accordingly.