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Modeling insufficient effort responses in mixed-worded scales

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Abstract

Surveys often add reverse-coded questions to monitor respondents with insufficient effort responses (IERs) but often wrongly assume that all respondents consistently answer all questions with full effort. By contrast, this study expanded the mixture model for IERs and ran a simulation via LatentGOLD to show the harmful consequences of ignoring IERs to positively and negatively worded questions: less test reliability, bias and less accuracy in slope and intercept parameters. We showed its practical application to two public data sets: Machiavellianism (five-point scale) and self-reported depression (four-point scale).

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Data Availability

Example 1 is available from https://openpsychometrics.org/_rawdata/. Example 2 is available from https://doi.org/10.5334/jopd.35. The LatentGOLD syntax for Example 1 is available from https://osf.io/rjc5p/.

Notes

  1. Other models allow nonuniform distributions of random responses (Meade & Craig, 2012).

  2. When simulees were generated with no IERs (i.e., πu = πv = [1, 0, 0]), EMMIER and GPCM are essentially equivalent.

  3. Based on Eq. 3 and item parameters in the Appendix Table 8, the generated responses do not need to be reverse-rescored.

  4. Sign-reversed δ-parameter estimates in LatentGOLD can be comparable to their true values.

  5. The data set is available from https://openpsychometrics.org/_rawdata/.

  6. Only 19 questions were included in the analyses, because the slope parameter for Q17 (“P.T. Barnum was wrong when he said that there's a sucker born every minute”) from any analytical model was very close to zero.

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Correspondence to Kuan-Yu Jin.

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Appendix

Appendix

Table 8 Generated item parameters in the simulation study

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Jin, KY., Chiu, M.M. Modeling insufficient effort responses in mixed-worded scales. Behav Res 56, 2260–2272 (2024). https://doi.org/10.3758/s13428-023-02146-w

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  • DOI: https://doi.org/10.3758/s13428-023-02146-w

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