Fig. 1.

Relationship between perceived cognitive difficulty and task performance and fibromyalgia symptoms.

A) Perceived cognitive difficulty (MASQ verbal memory score) was negatively associated with Nback task performance (2back accuracy) in controls (n = 12, r = − 0.66, p = 0.02), but not in fibromyalgia patients (n = 15, r = 0.18, p = 0.52); controls, black; patients, red. B) In patients, perceived cognitive difficulty (MASQ verbal memory score) was positively associated with the severity of fibromyalgia (FIQ score), n = 16, r = 0.65, p = 0.005. (For interpretation of the references to color in this figure, the reader is referred to the online version of this chapter.)