Using Person Fit Statistics to Detect Outliers in Survey Research

Felt JM, Castaneda R, Tiemensma J, Depaoli S. Using Person Fit Statistics to Detect Outliers in Survey Research. Front Psychol. 2017 May 26;8:863. doi: 10.3389/fpsyg.2017.00863. PMID: 28603512; PMCID: PMC5445123.

• The IRT likelihood-based approach to identify person-level outliers, also known as person fit, can be used in all types of survey research.
• we selected patients with Cushing’s syndrome (CS)
• The CushingQoL is the most commonly used diseasespecific health-related QoL questionnaire designed for patients diagnosed with CS (Webb et al., 2008). Webb et al. (2008)
• Using the person fit approach, patients with “atypical” response patterns are identified, even if their total
  scores are comparable to patients with more “typical” response patterns.

背景

• the person fit method is uncommon in the applied psychology literature

Materials and Methods