Thanks for the links but I remain unconvinced that Extraversion (describing people as either extrovert or introvert) is accurate or ultimately useful. From the

Thanks for the links but I remain unconvinced that Extraversion (describing people as either extrovert or introvert) is accurate or ultimately useful. From the 1st Wiki link I note that: 1. "Many studies have confirmed that in predicting actual behavior the more numerous facet or primary level traits are far more effective (e.g. Mershon & Gorsuch, 1988;[25] Paunonon & Ashton, 2001[26])" 2. Most measures are based on self-description. So we have a personality description which is not very accurate in terms of predicting behaviour and which also leads to a lot of disagreement (as witnessed by the comments here) about what it actually means in terms of behaviour and human interaction! If a "measure" is (a) not very accurate and (b) confuses rather than clarifies behaviour / human interaction then for me its not very useful no matter how seductive it is.