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7.32.            The advantage of CATI is that the spoken text can be standardized and better monitoring of the interviews is possible. Supervisors, interviewer training, pre-tests and interviewing instructions ensure the quality of the interviews. Plausibility checks are integrated to prevent typographical errors and outliers. Warnings are programmed, for example, to pop up during the interview if the stated expenses are below specified expenditure minimums. The warnings give the interviewer the opportunity to mention again that expenditures made on behalf of the respondent must be included. Such consistency checks make sure that typographical errors and outliers are identified (signals) and replaced (hard errors) immediately.

 

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