Because some defendants undergoing evaluation of their competence to stand trial may feign limitations in their ability to understand and participate in the legal process, assessment of their response style is critical. Preliminary research indicates that the Inventory of Legal Knowledge (ILK) has some potential to identify persons feigning competence related impairments. This study examined the convergent validity of the ILK using a sample of criminal defendants who, while undergoing competency evaluations, were administered the ILK and other response style measures. Moderate correlations between the ILK and these other tools provided some support for the ILK as a measure of response style.