“…The search results revealed the depressive personality was clearly the most studied of the group (with 125 citations), followed by self-defeating personality (69 citations), passive aggressive personality (27 citations), and sadistic personality (17 citations). Depressive PD has the most evidence for construct validity (see review by Maddux & Johansson, 2014). Few, if any, of these studies included older adults in the samples, revealing a significant dearth of knowledge about the impact and expression of these PD dimensions in later life.…”