Kenneth L. Davis completed his PhD with Jaak Panksepp on Opioids and the Social Behavior of Dogs. He has continued his work with Panksepp on developing the Affective Neuroscience Personality Scales (ANPS), and has since focused on adjectives closely related to the six primary emotions measured in the ANPS. He has recently developed a short adjective personality assessment called the ANPS-AR consisting of 24 adjectives, which can be used to self-rate personality but which can also be used by observers to rate the personalities of others such as therapy patients. With Panksepp he authored The Emotional Foundations of Personality: A Neurobiological and Evolutionary Approach (W.W. Norton, 2018).
Animal Emotions: How They Drive Human Behavior