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Total Error = Systematic Error + Random Sampling Error

Total Error = Systematic Error + Random Sampling Error. Errors. Systematic error Results from imperfections in research design or mistakes in research execution. Two sources – respondent error and administrative error. Errors. Random sampling error

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Total Error = Systematic Error + Random Sampling Error

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  1. Total Error = Systematic Error + Random Sampling Error

  2. Errors • Systematic error • Results from imperfections in research design or mistakes in research execution. • Two sources – respondent error and administrative error.

  3. Errors • Random sampling error • Purely statistical problem involving sample size. • Has nothing to do with research quality.

  4. Systematic Errors • Respondent Error – Error resulting from some respondent action or inaction.

  5. Respondent Error • Nonresponse error – Statistical differences between a survey that includes only those who responded and a perfect survey that would also include those who failed to respond.

  6. Respondent Error • Deliberate falsification – Respondent may wish to appear “better” than s/he really is.

  7. Respondent Error • Acquiescence Bias - Respondents are agreeable rather than truthful

  8. Respondent Error • Auspices Bias - Response bias caused by respondent being influenced by the sponsor of the study

  9. Respondent Error • Extremity bias - Respondents provide extreme responses to all questions

  10. Respondent Error • Carelessness - Respondents do not read or complete survey carefully

  11. Administrative Error • Data processing error- Involvesincorrect data entry, coding, or programming.

  12. Administrative Error • Sample selection error – Unrepresentative sample due to error in sample design.

  13. Administrative Error • Unconscious Interviewer error – Interviewermisrecords answers.

  14. Administrative Error • Interviewer cheating – Interviewer falsifies questionnaires.

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