As your helpful assistant, I would like to provide accurate information, but I need the specific article to which you are referring. However, I can offer some insight into the common units of analysis in personality science. Generally, personality science examines individual differences using several key units such as traits, motives, cognitive styles, and behavioral patterns. These units help researchers assess people's temperament, preferences, strengths, and weaknesses. If you provide me with more specific information or the article's title or context, I would be able to provide a more detailed response.