“…The PDI reliably measures self-assessed functional ability in seven areas: occupational, home/family, recreational, social, sexual, activities of daily living, and life support (Gronblad et al, 1993;Tait, Chibnall, & Krause, 1990;Tait, Pollard, Margolis, Duckro, & Krause, 1987). Similar to the MMPI, both are useful for identifying patients whose physical symptom presentations and disability are influenced by non-organic factors (Petrak, Hardt, Kappis, Nickel, & Tiber Egle, 2003;Sikorski, Stampfer, Cole, & Wheatley, 1996). For instance, Brasseux, Greve, Gianoli, Soileau, and Bianchini (2008) found a positive correlation between MSPQ scores and aphysiologic (i.e., non-organic) computerized dynamic posturography sway patterns in a sample of 115 patients with complaints of vestibular dysfunction and hearing impairment.…”