A known groups design compared the ability of the 24-item MMPI-2 Restructured Clinical Demoralization Scale (RCd), the 57-item Depression Scale (Scale 2), and the 15-item Malingered Mood Disorder Scale (MMDS) to identify non-credible symptom response sets in 84 personal injury litigants and disability claimants compared to 77 non-litigating head-injured controls. All three scales showed large effect sizes (>0.80). Scale 2 was associated with the largest effect size (2.19), followed by the MMDS (1.65), and the RCd (0.85). Logistic regression analyses revealed that a cutscore of > or =28 on the 57-item Scale 2 was associated with high specificity (96.1%) and sensitivity (76.2%), while a cutscore of > or =16 on the 24-item RCd was less accurate (87% specificity and 50% sensitivity). Cutscores for the MMDS were not calculated as they were reported in a previous study. Results indicated that like the 15-item MMDS, the 57-item MMPI-2 Scale 2 may provide another empirically derived index with known error rates upon which examiners may rely to investigate hypotheses relative to exaggeration of illness-related behavior and impression management in forensic contexts involving PI litigants and disability claimants.
The University of Delaware Department of Mechanical Engineering curriculum includes a senior design project, where teams address real design challenges facing local firms. The SURVICE Engineering Company tasked a team to design an improved metrology vector bar for use with an indoor global positioning system (iGPS) computer system. This vector bar needed to be ergonomic, easy to use, and easy to manufacture. To fulfill these requirements, metrics for a smaller, lighter, and more ergonomically designed Multi-Function Vector Bar were established. To encompass these metrics, four different subsystems were identified and integrated into a final design. Of these systems, emphasis was placed on a new ergonomic handle designed through an iterative process. New features were added to the handle to facilitate a decrease in human error and an increase in functionality. Multiple handle models were designed and tested to accomplish this. The final handle design resulted in a balanced, lighter, and more comfortable prototype that had two control buttons and indicator lights.
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