Also unique, it has three validity scales in order to assess the trauma victim's test-taking attitude, such as overreporting, underreporting and inconsistency.
Research shows that the TSI serves as a general validity screen but should be used cautiously in detecting malingered PTSD.
[3] Original psychometric data on the TSI demonstrated statistically adequate internal consistency (alphas ranging from .84 to .87).
[4] Validity with a civilian trauma-exposed sample has been demonstrated, with substantial relationships found between the TSI's clinical scale scores and other established measures of PTSD.
[6] In 2011 a second edition of the TSI was published (TSI-2),[7] Initial research demonstrated improved ability to detect simulated PTSD.