ABSTRACT: Romantic relationships of hypercompetitive individuals are much more problematic with greater conflict compared to those not so hypercompetitive; however, relationship satisfaction and commitment do not covary with hypercompetitiveness (Ryckman et al., 2002). (scirp.org)
Do sleep and pigmentation covary in adult owls, and if so how does this influence their behavior and physiology? (sciencedaily.com)
Differential risks of covarying and pure components in mother and teacher reports of externalizing and internalizing behavior across ages 5 to 14. (frontiersin.org)