Using an alpha level of 0.05, two items were flagged for DIF, standards item 8, “I have high expectations for myself” and discrepancy item 20, “I am hardly ever satisfied with my performance.” Standards item 8 failed to reach significance at the “total DIF” level and is therefore possibly type 1 error.
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The Almost Perfect Scale in medical students: factor analysis, measurement invariance, and profile analysis.
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