Breeds and Behavior

This study is included because it investigates presumed selection for a complex personality trait (impulsivity) among working lines of 2 breeds (those lines presumed to be selected for the ability to perform the breed traditional tasks), but also because it provides an example of the difficulties in defining a phenotype for large personality traits.

The paper is included in the discussion because differences between breeds were found, and the methodology with regard to breed differences demonstrates how potentially confounding variables make these conclusions suspect. 

This article is included because it evaluates the ability of the C-BARQ to quantify the incidence of warning and possibly biting behaviors toward strangers among pet dogs labeled by their owners as either Golden Retrievers, Labrador Retrievers, or German Shepherds.