With the introduction of punched-card processing in 1911, and the use of computers in 1961, the amount of information that can be collected and processed has been dramatically increased.
The Census Act, 1920, requires that a census be taken in Britain at intervals of not less than five years. With the exception of the 1966 Census (so far the only quinquennial census), censuses have been taken in Britain since 1801 (except in 1941 when there was no census).
The earliest censuses (1801-31) took the form of simple head counts. Self-completion forms were introduced in 1841. Since 1961 the census has involved most households completing a simple questionnaire and every tenth household completing a more detailed questionnaire.
The census has a number of important applications for the sociologist, including:
The census has also become a fruitful area for historical research and there is a growing interest in time-series research, or cliometrics in which modern statistical techniques are applied to historical data. See also SOCIAL SURVEY, FAMILY EXPENDITURE SURVEY, GENERAL HOUSEHOLD SURVEY, OFFICIAL STATISTICS, STATISTICS AND STATISTICAL ANALYSIS.
(1) In ancient Rome, the registration of citizens, with indication of their possessions, for the purpose of determining the citizens’ sociopolitical, military, and tax status. According to classical tradition, the introduction of the census is ascribed to Servius Tullius (sixth century B.C.), who divided the citizenry into five classes, or orders, determined on the basis of property qualifications. A citizen’s status was evidently originally dependent on his land or movable property; later it came to depend on his money. A census was taken once every five years. The census taking was supervised at first by the king and later by the consul; in 443 B.C. the office of censor was created for this purpose, but in the imperial age the emperor assumed the functions of the censor.
(2) In medieval Western and Central Europe, a quitrent or tax paid by the peasants. The census was the same as the czynsz, or Zins.