For readers looking for personality scales relevant to Chapter 7, the two personality scales below have been carefully constructed through research. You can use them for yourself, but you can also use them to rate romantic partners.
For a short, 30-item personality measure, see this 538 article: Big Five Inventory-2
For a longer, 60-item version with more detailed results go to: PersonalityLab.org
Reference for scale development: Soto, Christopher J., and Oliver P. John. "Short and extra-short forms of the Big Five Inventory–2: The BFI-2-S and BFI-2-XS." Journal of Research in Personality, 68 (2017): 69-81.