ID Variable

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A variable in a data file which contains a distinct value for each respondent. Its primary role is to assist in managing data quality issues (e.g., if a particular response to a survey is considered to be of dubious quality, knowing the value on the ID Variable makes it easier to ensure that the respondent is deleted from future data exports).

Also known as

  • Analysis subject identifier.
  • Unique key.
  • Unique identifier.
  • Identification variable.