The Integrated Coverage Measurement (ICM) process estimated the population of persons in the 1995 Test Census. The person interview component of the ICM was administered through a post-census CAPI interview. This instrument was a complex questionnaire constructed to serve multiple purposes. It was designed to gather an independent roster, conduct a thorough cover age interview, perform computer matching, resolve ICM/census roster discrepancies, and determine residency status. These competing goals, along with the complexities of a computer-assisted interview, presented numerous challenges for the questionnaire designers. The behavior coding explored in this paper provided valuable data from which to identify problems and begin the process of redesigning a simpler, more streamlined instrument.