Category Skew and Discriminant Validity With Likert-Type Items: Code and Results

Code and results accompanying: Zhang, J. (2026). Category skew can make identical constructs look distinct: Discriminant validity assessment with Likert-type items [Manuscript submitted for publication]. The archive contains the Python code for the exact population computations (Study 1); the R/lavaan code for the Monte Carlo simulation, with all seeds (Study 2; 174 conditions, 1,000 replications each); the code for the real-data check with the SAPA Personality Inventory (Study 3); the R function skew_htmt_check() printed in Appendix B; all condition-level results; the per-replication estimates of Study 2; and the figures. README.md maps each table and figure in the article to the file that produces it.