TOMM Trial 1 as a performance validity indicator in a criminal forensic sample.

Area of Science:

• Neuroscience
• Forensic Psychology
• Psychological Assessment

Background:

• Performance Validity Tests (PVTs) are crucial in forensic evaluations to detect response bias.
• The full Test of Memory Malingering (TOMM) is a widely used PVT, but its length can be a limitation.
• Shorter, efficient PVTs are needed in forensic settings.

Purpose of the Study:

• To evaluate the Test of Memory Malingering Trial 1 (TOMM1) as a standalone Performance Validity Test (PVT).
• To compare the effectiveness of TOMM1 against the full Test of Memory Malingering (TOMM) in a criminal forensic sample.

Main Methods:

• 119 individuals in a forensic hospital setting were evaluated.
• Criterion groups were established based on performance on other PVTs: Malingered Neurocognitive Dysfunction (+MND), possible MND (pMND), and no MND (-MND).
• Receiver Operating Characteristic (ROC) analyses compared TOMM1 and TOMM performance.

Main Results:

• TOMM1 demonstrated high predictive accuracy for the full TOMM decision rules (AUC = .92).
• TOMM1 showed robust accuracy in predicting failure on two PVTs (AUC = .80), with specific cutoffs yielding acceptable sensitivity and specificity.
• Adjusted analyses indicated improved TOMM1 diagnostic utility (AUC = .84).

Conclusions:

• The TOMM1 is a valid and effective PVT in criminal forensic evaluations.
• TOMM1 offers a more time-efficient alternative to the full TOMM without compromising accuracy.
• These findings support the use of TOMM1 to enhance efficiency in forensic evaluations.