Invalid Test Performance and Noncredible Symptom Report: Performance and Symptom Validity Tests in Mentally Disordered Offenders within the Criminal Justice System

This repository contains the open materials and dataset for the study on the Symptom Validity Test – Thai version (SVT-Th). The package includes: The 57 self-report items in Thai (clean version, excluding demographic questions) Coding scheme and scoring instructions (RS, SC, EP, ORV subscales) Confirmatory factor analysis (CFA) syntax at the subscale level (RS, SC, EP, ORV → UDS, ADS → SVT) The de-identified dataset (SPSS .sav file) used for psychometric evaluation The SVT-Th was originally developed and validated in 2019 and subsequently applied in forensic and clinical contexts in Thailand (Arin & Khowboonngam, 2019). The dataset has been fully anonymized and does not contain any personally identifying information. It is provided for reproducibility and secondary analyses in line with open science practices.