To Lump or Split When Assessing Psoriatic Arthritis — Not Mutually Exclusive?

Seronegative spondyloarthropathies: to lump or split?

The advent of novel biological therapies for the treatment of rheumatic disease has renewed interest in the seronegative spondyloarthropathies (SpAs). International efforts are redefining disease classification and measures of disease activity, outcome, metrology, and imaging. However, opinion is divided between those who propose that the SpA group represents the same disease with variable expr...

Not Mutually Exclusive but Mutually Beneficial

There has been a long-standing debate about whether having accurate self-perceptions or holding positive illusions of self is more adaptive. This debate has recently expanded to consider the role of accuracy and bias of partner perceptions in romantic relationships. In the present study, we hypothesized that because accuracy, positivity bias, and similarity bias are likely to serve distinct fun...

Remembering when Words are Mutually Exclusive

During the second year of life, infants develop a ‘mutual exclusivity’ bias to attach novel object labels to novel, nameunknown objects, rather than familiar, name-known objects (Markman, 1989). In an intermodal preferential looking experiment with 19.5and 22.5-month-old infants, stimulus repetition was critical for observing mutual exclusivity. On the first occasion that a novel label was pres...

Psoriasis, psoriatic arthritis, or psoriatic disease?

In this issue of The Journal, Madland, et al report results of a 2 week pilot study on a dietary supplementation with seal oil compared to soy oil in patients with psoriatic polyarthritis1. Despite its short duration, several results of this research are significant. Mainly, 4 weeks after the treatment, subjects taking seal oil dietary supplementation reported improvement in patient’s global as...

The Difficult Task of Assessing Psoriatic Arthritis.