In an old fable, a nightingale issues a challenge to an inchworm to measure her song- to prevent being eaten. Fearful, the worm tricks the bird into singing while he inches away. Sound familiar? When marketers ask for what at the surface appear to be complex concepts, like engaged fans, measurers run! Given the tidy unit inherent to the worm, a simple solution could have been to measure the ground for the length of the song. Social and personality psychologists have been doing things like this for many years and have developed methods of overcoming the exact challenges marketers are grappling with today. They’ve developed common coins to help draw general conclusions and means of going beyond standard assessments with more innovative methodologies to capture different levels of behavior. We will present several basic lessons from social and personality psychology that marketers and social media analysts can learn to improve the integrity and trustworthiness of their findings.