1 1 Using traditional control systems to reveal changes when introducing new data collection instruments Sindre Børke Senior Adviser Division.

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Presentation transcript:

1 1 Using traditional control systems to reveal changes when introducing new data collection instruments Sindre Børke Senior Adviser Division for Data Collection Methods, Statistics Norway

2 Information model (survey definitions) Web- solution Web questionnaire Paper questionnaire Survey database Data from web questionnaires Data from paper questionnaires Editing Process Paper contra web Questionnaires

3 Outsourced editing gives better data Household census: average 6,2 and 3,4 errors Hotel statistics: average 1.7 and 0.7 errors Hotels, prize per room: 41% contra 36% with error

4 Without controls, more errors in web? Not in household census 2001 Hotels, number of rooms let out: 12% contra 18% error (PPI: 1.27% contra 1.40% outside the defined range) Road goods transport: Different patterns to be explained

5 Behind – or on - the screen Following the respondent’s filling-in process, and the warnings presented during this process

6 Errors in incoming web and paper version of the hotel statistics questionnaire

7 Errors detected in the web and paper version of the hotel statistics questionnaire One error message More error messages One error message More error messages

8 Information model (survey definitions) Supporting software Basic software Individual adaptions Enterprise database Web- solution Web questionnaire Paper questionnaire Survey database Data from Enterprise system Data from web questionnaires Data from paper questionnaires Editing Process Transfer of electronic data

9 Allready in wide use for accounts and salary data in Norway. Presents challenges in development and upkeeping –Supporting software from the software vendors –Individual adaptions at the respondent’s Looking into one case with traditional controls, finding better results than from paper questionnaires Requires different control/editing, due to different set of possible errors and different consequences when errors occurs

10 In short: Few surveys seems to have data to observe possible changes in quality Those data we find seem to tell that there are changes Possible changes in data that are not part of a control can not be revealed with the instrument we use in this paper This field must be further investigated, and give feed-back/- forward to the editing procedure and to questionnaire developing